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United States Patent Application 20070056572
Kind Code A1
Frasca; Joseph Franklin March 15, 2007

Electromagnetic Propulsion Devices Utilizing Wall Conductors

Abstract

Electromagnetic propulsion devices having a barrel with a cavity its length, armatures for said cavity with a propulsion bus in and circumscribing said armature's body, orthogonal the axis thereof with power rail continuity on one end and propulsion bus-aft shunt circuit means continuity the other and an array of wall conductors orthogonal and circumscribing most of said barrel's cavity and distributed between said cavity's ends with contact means at the cavity at one end and a bus common to all wall conductors at the other and an armature forward shunt directs current between a power rail and forward wall conductors and an armature aft current shunt directs current between said circuit means and aft wall conductors and wherein the magnetic fields of current in the barrel wall conductors immediately before and immediately aft the armature's propulsion bus interact with the current therein creating forces propelling the armature through said cavity.


Inventors: Frasca; Joseph Franklin; (ATLANTA, GA)
Correspondence Name and Address:
    JOSEPH FRANKLIN FRASCA
479 EAST PACES FERRY ROAD, NE APT #1121
ATLANTA
GA
30305-3318
US
Serial No.: 308853
Series Code: 11
Filed: May 15, 2006

U.S. Current Class: 124/3; 89/8
U.S. Class at Publication: 124/003; 089/008
Intern'l Class: F41B 6/00 20060101 F41B006/00; F41F 1/00 20060101 F41F001/00


Claims



1. Electromagnetic propulsion devices comprising: a barrel; a cavity therein which extends the length of said barrel and having: a breech end opening at one end and a muzzle end opening at the other barrel end and a central axis which extends from said breech end opening to said muzzle end opening and a uniform right section profile to said central axis throughout said cavity; and two barrel rails which are: power rails, and parallel to one another and located in said barrel cavity's wall, and electrically insulated from direct electrical continuity with each other, and each said power rail has: continuous barrel cavity surface along its length and connection means to outside said barrel for attachment to a power source; and a wall conductor assembly comprised of: a barrel bus that is: located outside of said barrel cavity, and parallel said barrel power rails, and electrically insulated from direct electrical continuity with said barrel power rails, and located along the same length of the barrel as said power rails; and an array of wall conductors that are: located outside of said barrel cavity, and oriented orthogonal said barrel cavity axis, and parallel to one another, and separated from one another, and distributed along the length of said barrel bus, and each wall conductor of said wall conductor array: is a continuous insulated conductor between its ends, and has electrical continuity at one end with said barrel bus, and circumscribes most of the barrel cavity from said barrel bus to proximal said power rail distal said barrel bus, and circumscribes most of the barrel cavity in the same direction from said continuity with said barrel bus as all other wall conductors of said array of wall conductors; and contact means for each wall conductor of said array of wall conductors that: is located proximal said wall conductor's end that is distal said wall conductor's end with said barrel bus continuity, and has continuous electrical continuity with said wall conductor thereat, and extends through a mating opening in the barrel cavity wall, and has surface in the barrel cavity; and armatures for propulsion through said barrel cavity and each said armature has: a central axis that is, with said armature in said barrel cavity, coincident the central axis of said cavity or very close and parallel the cavity's central axis, and a muzzle end that is, with said armature in said barrel cavity, the armature's end closest the cavity's muzzle end, and a breech end that is, with said armature in said barrel cavity, the armature's end closest the cavity's breech end, and all right section profiles to said axis smaller than said barrel cavity's right section profile, and a portion of said profiles like said barrel cavity's right section profile but slightly undersized thereof; and a propulsion bus that is: a continuous conductor between its ends, and located midway between said armature's muzzle and breech ends, and oriented orthogonal said armature's central axis, and located in said armature where said cavity's right section profile and said armature's right section profiles are similar, and located within said armature, in, at or proximal said armature's surface that in said barrel cavity is proximal said cavity's surface, and said propulsion bus between its ends circumscribes most of said armature, and has, with said armature in said barrel cavity, surface at one end with continuous electrical continuity with said cavity surface of one of said power rails and continuous electrical continuity at its other end with propulsion bus-aft shunt circuit means; and a forward current shunt that: is located in said armature's surface between said propulsion bus and said armature's muzzle end, and, with said armature in said barrel cavity, is proximal the power rail without said propulsion bus continuity and has surface with continuous electrical continuity with the cavity surface of said power rail and is insulated from direct electrical continuity from said power rail with said propulsion bus continuity, and has surface at and with continuous electrical continuity with said contact means of said wall conductor assembly at the instant barrel cavity location of said shunt's surface; and said wall conductor assembly has additionally, with an armature in said barrel cavity, forward wall conductors comprised of: the group of one or more consecutive wall conductors of said wall conductor assembly whose contact means at any instant have said electrical continuity with said forward current shunt surface at said contact means; and each said armature also has an aft current shunt that: is located in the armature's surface between said propulsion bus and said armature's breech end, and, with said armature in said barrel cavity, has continuous electrical continuity with propulsion bus-aft shunt circuit means, and has surface at and with continuous electrical continuity with said contact means of said wall conductor assembly at the instant barrel cavity location of said shunt's surface; and said wall conductor assembly has additionally, with an armature in said barrel cavity, aft wall conductors comprised of: the group of one or more consecutive wall conductors of said wall conductor assembly whose contact means at any instant have said electrical continuity with said aft current shunt surface at said contact means; and said propulsion bus-aft shunt circuit means is comprised: an electric current bus in said armature that is located: proximal said current shunts therein, and between and connecting said aft current shunt and the end of said propulsion bus distal said propulsion bus's end with said power rail continuity; and wherein with power supplied to the power rails by an outside power supply so that: the magnetic fields of current in said forward wall conductors interact with the current in said propulsion bus creating forces in said propulsion bus with cavity axis parallel, muzzle directed components, and the magnetic fields of current in said aft wall conductors interact with the current in said propulsion bus creating forces in said propulsion bus with cavity axis parallel, muzzle directed components, and said cavity axis parallel, muzzle directed force components, propel the armature through said barrel's cavity from breech to muzzle.

2. Electromagnetic propulsion devices as claimed in claim 1 wherein said barrel has a twist so that consecutive right sections through the barrel have a constant rate of angular rotation about said cavity axis per unit cavity axis distance; and said armatures for use in said barrel cavity have a twist so that consecutive right sections through said armatures have the same constant rate of angular rotation about the armature axis per unit axis distance; and said twist imparts rotation to said armatures during their traverse from said barrel cavity's breech end to muzzle end.

3. Electromagnetic propulsion devices as claimed in claim 1 but wherein said propulsion bus-aft shunt circuit means is comprised: a third barrel rail that: is located in said barrel wall, and has continuous barrel cavity surface along its length, and is electrically isolated from said barrel power rails, and is parallel said barrel power rails, and is located along the same barrel cavity length as said power rails; and additional surface on said propulsion bus that: is proximal said bus's end that is distal said bus's end with power rail continuity, and with said armature in said barrel cavity, is at and has continuous electrical continuity with the barrel cavity surface of said third barrel rail; and additional surface on said aft current shunt that: with said armature in said barrel cavity, is at and has continuous electrical continuity with the barrel cavity surface of said third barrel rail.

4. An electromagnetic propulsion device as claimed in claim 3 wherein the barrel cavity has a twist so that: consecutive right sections through the barrel have a constant rate of angular rotation about the cavity axis per unit cavity distance; and armatures for use in said barrel cavity have a twist so that: consecutive right sections through said armatures have the same constant angular rotation rate about the armature axis per unit axis distance, and said twist imparts rotation to said armatures during their barrel cavity traverse.

5. Electromagnetic propulsion devices comprising: a barrel; a cavity therein which extends the length of said barrel and having: a breech end opening at one end, and a muzzle end opening at the other barrel end, and a central axis which extends from said breech end opening to said muzzle end opening, and a uniform right section profile to said central axis throughout said cavity; and two barrel rails which are: power rails, and parallel to one another and located in said barrel cavity's wall, and electrically insulated from direct electrical continuity with each other, and each said power rail has: continuous barrel cavity surface along its length and connection means to outside said barrel for attachment to a power source; and a wall conductor assembly comprised of: a barrel bus that is: located outside of said barrel cavity, and parallel to said barrel power rails, and electrically insulated from direct electrical continuity with said barrel power rails, and located along the same length of the barrel as said power rails; and an array of wall conductors that are: located outside of said barrel cavity, and oriented orthogonal said barrel cavity axis, and parallel to one another, and separated from one another, and distributed along the length of said barrel bus, and each wall conductor of said wall conductor array: is a continuous insulated conductor between its ends, and has electrical continuity at one end with said barrel bus, and circumscribes most of the barrel cavity from said barrel bus to proximal said power rail thereto distal, and circumscribes most of the barrel cavity in the same direction from said continuity with said barrel bus as all other wall conductors of said array of wall conductors; and contact means for each wall conductor of said array of wall conductors that: is located proximal the end of said wall conductor that is distal said wall conductor's end with said barrel bus continuity, and has continuous electrical continuity with said wall conductor's barrel bus distal end, and extends through a mating opening in the barrel cavity wall and has surface in the barrel cavity; and armatures for propulsion through said barrel cavity and each said armature has: a central axis that is, with said armature in said barrel cavity, coincident the central axis of said cavity or very close and parallel the cavity's central axis, and a muzzle end that is, with said armature in said barrel cavity, the armature's end closest the cavity's muzzle end, and a breech end that is, with said armature in said barrel cavity, the armature's end closest the cavity's breech end, and all right section profiles to said axis smaller than said barrel cavity's right section profile, and a portion of said profiles like said barrel cavity's right section profile but slightly undersized thereof; and a propulsion bus that is: a continuous conductor between its ends, and located midway between said armature's muzzle and breech ends, and oriented orthogonal said armature's central axis, and located in said armature where said cavity's right section profile and said armature's right section profiles are similar, and located within said armature, in, at or proximal said armature's surface that in said barrel cavity is proximal said cavity's surface, and said propulsion bus between its ends circumscribes most of said armature, and has, with said armature in said barrel cavity, surface at one end with continuous electrical continuity with said cavity surface of one of said power rails and with armature movement in said barrel cavity said electrical continuity is continuous sliding electrical continuity, and continuous electrical continuity at its other end with propulsion bus-aft shunt circuit means; and a forward current shunt that: is located in said armature's surface between said propulsion bus and said armature's muzzle end, and, with said armature in said barrel cavity, is proximal the barrel power rail without propulsion bus continuity, and has surface with continuous electrical continuity with the cavity surface of said power rail and with armature movement in said barrel cavity said electrical continuity is continuous sliding electrical continuity, and is insulated from direct electrical continuity with the power rail with propulsion bus continuity, and has surface at and with continuous electrical continuity with said contact means of said wall conductor assembly at the instant barrel cavity location of said shunt surface and said continuity is sliding electrical continuity with armature movement in the barrel cavity; and said wall conductor assembly has additionally, with an armature in said barrel cavity, forward wall conductors comprised of: the group of one or more consecutive wall conductors of said wall conductor assembly whose contact means at any instant have said electrical continuity with said forward current shunt surface at said contact means; and said forward current shunt of an armature in said barrel cavity, via said shunt's continuous electrical continuity with said power rail and said shunt's continuous electrical continuity with said forward wall conductors of said wall conductor assembly, maintains continuous electrical continuity between said barrel power rail and said forward wall conductors; and each said armature also has: an aft current shunt that: is located in the armature's surface between said propulsion bus and said armature's breech end, and, with said armature in said barrel cavity, has continuous electrical continuity with propulsion bus-aft shunt circuit means, and has surface at and with continuous electrical continuity with said contact means of said wall conductor assembly at the instant barrel cavity location of said shunt's surface and said continuity is sliding electrical continuity with armature movement in the barrel cavity, and said aft current shunt of an armature in the barrel cavity is electrically insulated from direct electrical continuity with said barrel power rails; and said wall conductor assembly has additionally, with an armature in said barrel cavity, aft wall conductors comprised of: the group of one or more consecutive wall conductors of said wall conductor assembly whose contact means at any instant have said electrical continuity with said aft current shunt surface at said contact means; and said aft current shunt of an armature in said barrel cavity, via said shunt's continuous electrical continuity with said propulsion bus-aft shunt circuit means and said shunt's continuous electrical continuity with said aft wall conductors of said wall conductor assembly, maintains continuous electrical continuity between said propulsion bus-aft shunt circuit means and said aft wall conductors; and said barrel bus of said wall conductor assembly, with an armature in said barrel cavity, maintains continuous electrical continuity between said forward wall conductors and said aft wall conductors of said wall conductor assembly; and said propulsion bus-aft shunt circuit means is comprised: an electric current bus in said armature that is located: proximal said current shunts therein, and between and connecting said aft current shunt and the end of said propulsion bus distal said propulsion bus's end with said power rail continuity; and wherein with power supplied to the power rails by an outside power supply so that: the magnetic fields of current in said forward wall conductors interact with the current in said propulsion bus creating forces in said propulsion bus with cavity axis parallel, muzzle directed components, and the magnetic fields of current in said aft wall conductors interact with the current in said propulsion bus creating forces in said propulsion bus with cavity axis parallel, muzzle directed components, and said cavity axis parallel, muzzle directed force components, propel the armature through the barrel cavity from breech to muzzle.

6. Electromagnetic propulsion devices as claimed in claim 5 wherein said barrel has a twist so that consecutive right sections through the barrel have a constant rate of angular rotation about said cavity axis per unit cavity axis distance; and said armatures for use in said barrel cavity have a twist so that consecutive right sections through said armatures have the same constant rate of angular rotation about the armature axis per unit axis distance; and said twist imparts rotation to said armatures during their traverse from said barrel cavity's breech to muzzle.

7. Electromagnetic propulsion devices as claimed in claim 5 but wherein said propulsion bus-aft shunt circuit means is comprised: a third barrel rail that: is located in said barrel wall, and has continuous barrel cavity surface along its length, and is electrically isolated from said barrel power rails, and is parallel said barrel power rails, and is located along the same barrel cavity length as said power rails; and additional surface on said propulsion bus that is: proximal said bus's end that is distal said bus's end with power rail continuity, and, with said armature in said barrel cavity, at and has continuous electrical continuity with the barrel cavity surface of said third rail and said continuity is sliding electrical continuity with armature movement in the barrel cavity; and additional surface on said aft current shunt that is, with said armature in said barrel cavity, at and has continuous electrical continuity with the barrel cavity surface of said third barrel rail and said continuity is sliding electrical continuity with armature movement in the barrel cavity; and said propulsion bus-aft shunt circuit means, with said armature in said barrel cavity, maintains continuous electrical continuity between said propulsion bus and said aft current shunt.

8. An electromagnetic propulsion device as claimed in claim 7 wherein the barrel has a twist so that consecutive right sections through the barrel have a constant rate of angular rotation about the cavity axis per unit cavity distance; and armatures for use in said barrel cavity have a twist so that consecutive right sections through said armatures have the same constant angular rotation rate about the armature axis per unit axis distance, and said twist imparts rotation to said armature during their barrel cavity traverse.

9. Electromagnetic propulsion devices comprising: a barrel; a cavity therein which extends the length of said barrel and having: a breech end opening at one end, and a muzzle end opening at the other barrel end, and a central axis which extends from said breech end opening to said muzzle end opening, and a uniform right section profile to said central axis throughout said cavity; and two barrel rails which are: power rails, and parallel to one another, and located in said barrel cavity's wall, and electrically insulated from direct electrical continuity with each other, and each said power rail has: continuous barrel cavity surface along its length and connection means to outside said barrel for attachment to a power source; and a wall conductor assembly comprised of: a barrel bus that is: located outside of said barrel cavity, and parallel said barrel power rails, and electrically insulated from direct electrical continuity with said barrel power rails, and located along the same length of the barrel as said power rails; and an array of wall conductors that are: located outside of said barrel cavity, and oriented orthogonal said barrel cavity axis, and parallel to one another, and separated from one another, and distributed along the length of said barrel bus, and each wall conductor of said wall conductor array: is a continuous insulated conductor between its ends, and has electrical continuity at one end with said barrel bus, and circumscribes most of the barrel cavity from said barrel bus to said power rail thereto distal and circumscribes most of the barrel cavity in the same direction from said continuity with said barrel bus as all other wall conductors of said array of wall conductors; and contact means for each wall conductor of said array of wall conductors that: is located proximal the end of said wall conductor that is distal said wall conductor's end with said barrel bus continuity, and has continuous electrical continuity with said wall conductor's barrel bus distal end, and extends through a mating opening in the barrel cavity wall and has surface in the barrel cavity; and armatures for propulsion through said barrel cavity and each said armature has: a central axis that is, with said armature in said barrel cavity, coincident the central axis of said cavity or very close and parallel the cavity's central axis, and a muzzle end that is, with said armature in said barrel cavity, the armature's end closest the cavity's muzzle end, and a breech end that is, with said armature in said barrel cavity, the armature's end closest the cavity's breech end, and all right section profiles to said axis smaller than said barrel cavity's right section profile, and a portion of said profiles like said barrel cavity's right section profile but slightly undersized thereof; and a propulsion bus that is: a continuous conductor between its ends, and located midway between said armature's muzzle and breech ends, and oriented orthogonal said armature's central axis, and located in said armature where said cavity's right section profile and said armature's right section profiles are similar, and located within said armature, in, at or proximal said armature's surface, and with the armature in said barrel's cavity, said propulsion bus: is proximal said cavity's surface, and between its ends circumscribes most of said armature, and has surface at one end with continuous electrical continuity with the cavity surface of one of said power rails and with armature movement in said barrel cavity said electrical continuity is continuous sliding electrical continuity, and has continuous electrical continuity at its other end with propulsion bus-aft shunt circuit means; and a forward current shunt that: is located in said armature's surface between said propulsion bus and said armature's muzzle end, and, with said armature in said barrel cavity, is proximal the said barrel power rail without propulsion bus continuity, and has surface with continuous electrical continuity with the cavity surface of said power rail and with armature movement in said barrel cavity said electrical continuity is continuous sliding electrical continuity and is insulated from direct electrical continuity with the said power rail with propulsion bus continuity, and has surface at and with continuous electrical continuity with said contact means of said wall conductor assembly at the instant barrel cavity location of said shunt surface and said continuity is sliding electrical continuity with armature movement in the barrel cavity; and said wall conductor assembly has additionally, with an armature in said barrel cavity, forward wall conductors comprised of: the group of one or more consecutive wall conductors of said wall conductor assembly whose contact means at any instant have said electrical continuity with said forward current shunt surface at said contact means; and said forward current shunt of an armature in said barrel cavity, via said shunt's continuous electrical continuity with said power rail and said shunt's continuous electrical continuity with said forward wall conductors of said wall conductor assembly, maintains continuous electrical continuity between said barrel power rail and said forward wall conductors, and, with power supplied by an outside power supply to said power rails, maintains a current path between said barrel power rail, and said forward wall conductors; and each said armature also has an aft current shunt that: is located in the armature's surface between said propulsion bus and said armature's breech end, and, with said armature in said barrel cavity, has continuous electrical continuity with propulsion bus-aft shunt circuit means, and has surface at and with continuous electrical continuity with said contact means of said wall conductor assembly at the instant barrel cavity location of said shunt's surface and said continuity is sliding electrical continuity with armature movement in the barrel cavity, and is electrically insulated from direct electrical continuity with said barrel power rails; and said wall conductor assembly has additionally, with an armature in said barrel cavity, aft wall conductors comprised of: the group of one or more consecutive wall conductors of said wall conductor assembly whose contact means at any instant have said electrical continuity with said aft current shunt surface at said contact means; and said aft current shunt of an armature in said barrel cavity, via said shunt's continuous electrical continuity with said propulsion bus-aft shunt circuit means and said shunt's continuous electrical continuity with said aft wall conductors of said wall conductor assembly, maintains continuous electrical continuity between said propulsion bus-aft shunt circuit means and said aft wall conductors, and, with power supplied by an outside power supply to said power rails, maintains a current path between said propulsion bus-aft shunt circuit means, and said aft wall conductors; and said barrel bus of said wall conductor assembly, with an armature in said barrel cavity, provides continuous electrical continuity between said forward wall conductors and said aft wall conductors of said wall conductor assembly and with power supplied by an outside power supply to said power rails, provides a current path between said forward wall conductors and said aft wall conductors; and said propulsion bus-aft shunt circuit means is comprised: an electric current bus in said armature that is located: proximal said current shunts therein, and between and connecting said aft current shunt and the end of said propulsion bus distal said propulsion bus's end with said power rail continuity; and wherein with power supplied to the power rails by an outside power supply so that: the magnetic fields of current in said forward wall conductors interact with the current in said propulsion bus creating forces in said propulsion bus with cavity axis parallel, muzzle directed components, and the magnetic fields current in said aft wall conductors interact with the current in said propulsion bus creating forces in said propulsion bus with cavity axis parallel, muzzle directed components, and said cavity axis parallel, muzzle directed force components, propel the armature through the barrel cavity from breech to muzzle.

10. Electromagnetic propulsion devices as claimed in claim 9 wherein said barrel cavity has a twist so that consecutive right sections through the barrel have a constant rate of angular rotation about said cavity axis per unit cavity axis distance; and said armatures for use in said barrel cavity have a twist so that consecutive right sections through said armatures have the same constant rate of angular rotation about the armature axis per unit axis distance; and said twist imparts rotation to said armatures during their traverse from said barrel cavity's breech to muzzle.

11. Electromagnetic propulsion devices as claimed in claim 9 but wherein said propulsion bus-aft shunt circuit means is comprised: a third barrel rail that: is located in said barrel wall, and has continuous barrel cavity surface along its length, and is electrically isolated from said barrel power rails, and is parallel said barrel power rails, and is located along the same barrel cavity length as said power rails; and additional surface on said propulsion bus that: is proximal said bus's end that is distal said bus's end with power rail continuity, and, with said armature in said barrel cavity, is at and has continuous electrical continuity with the barrel cavity surface of said third rail and said continuity is sliding electrical continuity with armature movement in the barrel cavity; and additional surface on said aft current shunt that, with said armature in said barrel cavity, is at and has continuous electrical continuity with the barrel cavity surface of said third barrel rail and said continuity is sliding electrical continuity with armature movement in the barrel cavity; and said propulsion bus-aft shunt circuit means, with said armature in said barrel cavity, maintains continuous electrical continuity between said propulsion bus and said aft current shunt and maintains a current path between said propulsion bus and said aft current shunt, with power supplied by an outside power supply to said power rails.

12. An electromagnetic propulsion device as claimed in claim 11 wherein the barrel has a twist so that consecutive right sections through the barrel have a constant rate of angular rotation about the cavity axis per unit cavity distance; and armatures for use in said barrel's cavity have a twist so that consecutive right sections through said armatures have the same constant angular rotation rate about the armature axis per unit axis distance, and said twist imparts rotation to said armature during their barrel cavity traverse.
Description



CROSS REFERENCE TO RELATED APPLICATIONS

[0001] This application is a divisional application of patent application: Ser. No. 10/707,607 filed Dec 24, 2003 and claims the benefit of the filing dates of provisional patent application: 60/319,820 filed Dec. 30, 2002, provisional patent application: 60/320,208 filed May 21, 2003, and provisional patent application: 60/481,159. This application is also related to sister divisional application: Ser. No. 11/164,727 filed Dec. 2, 2005, sister divisional application: Ser. No. 11/306,245 filed Dec. 20, 2005 and sister divisional application Ser. No. 11/308,565 filed Apr. 7, 2006.

BACKGROUND OF THE INVENTION

[0002] 1. Field of the Invention

[0003] The following invention is related electromagnetic propulsion devices such as rail devices. In rail devices a magnetic field perpendicular to an electrical current path through an armature, interacts with the path current, creating force on the armature which is perpendicular to both the current path and the magnetic field. The armature of a rail device is located between and has electrical continuity with the device's parallel power rails. In the rail device, armature current flow is resultant a voltage potential between the power rails.

[0004] 2. Description of Related Art

[0005] The source of the armature accelerating magnetic fields in a rail device is often only its very large rail currents. Among the oldest patented rail device inventions are those of Fauhon-Villeplee which include U.S. Pat. No. 1,370,200. The Fauhon-Villeplee devices have, in addition to the magnetic fields of the rail currents, magnetic fields for armature acceleration supplied by electromagnets and/or permanent magnets arranged along the armature's path between the power rails. The power rails primary function is the supply of armature current. These devices, though more cumbersome, permit more latitude in accelerator design.

[0006] Pyrotechnic armature acceleration means such as gun powders and more esoteric explosives pervasive civilian and military armaments today have upper armature velocity limits. These upper velocity limits are determined by the molecular velocity of the armature propelling explosion gases at the maximum pressure and temperature permitted in the barrel. Rail devices do not share this limitation. Therefore, the massive power generation and distribution systems--which can include cryogenic equipment--needed to meet a rail device's immense electric current requirements to propel armatures to hyper velocities are seen as acceptable overhead.

[0007] With the effective development of gas cartridge fired power sources similar to those used for emergency power in some commercial and military aircraft, a significant reduction in the mass of rail gun support equipment should be possible.

[0008] The equations and examples herein are intended as aides to practitioners of the arts relevant to the topic devices and are not part of the claimed devices, and the degree of their veracity is not intended to reflect adversely on the veracity, spirit, intent, merit or scope of this application for letters of patent.

[0009] A simplified equation for the incremental force due to one rail in a rail device is:df=dq(U.times.B)=(dQdl/dt.times.B)=I dl.times.B=I dl.times..mu.I(2.pi.r), where .mu.=4.pi..times.10.sup.-7 H/m. 1) The force on the armature due to the current in both rails is then: Force = 2 .function. [ I 2 .function. ( 4 .times. .pi. .times. 10 - 7 ) ] .times. .intg. r 0 r 1 .times. .times. d r / ( 2 .times. .pi. .times. .times. r ) = I 2 .function. ( 4 .times. 10 - 7 ) .times. ln .function. ( r 2 / r 0 ) .times. Newton 2 ) where r.sub.o is effective radius of one of the rails and r.sub.a is the straight line distance from that rail to the second rail.

[0010] The following example illustrates the magnitude of the currents required by conventional rail devices.

[0011] A hypothetical device with a 11.43 mm cylindrical bore (0.45 inches) and an approximate 0.6264 m (24 inches) barrel length, fires a 6.48 gram (100 grain) bullet with muzzle velocity of 1524 m/s (5000 ft/s). Ignoring air and barrel friction, a like muzzle velocity would also result from a steady force of 12344.2 N (2775 lbf) applied to the bullet during its 0.0008 second barrel traverse. At the muzzle the bullet has 7525 J (5550 ft-lbf) kinetic energy.

[0012] Applying equation 2, above, for the rail device force (with an r.sub.a/r.sub.o ratio of 5.4) for like performance of a 0.6264 m (24 inches) long rail device propelled bullet and ignoring air and barrel friction and circuit losses, a current of approximately 135,065 Amperes at a rail potential of 69.6 Volts is required to produce the 12344.2 N force on the armature for the 0.8 millisecond barrel traverse time.

[0013] For a like performance in a rail device that has a 0.6264 m long barrel (24 inches) cavity with a rectangular right section and a r.sub.a/r.sub.o ratio of 15, propelling a 6.48 gram (100 grain) flat armature with a 0.0422 m (1.66 inches) long propulsion bus, an approximate current of 106,751 Amperes at a rail potential of 88.1 volts is required to produce the 12344.2 Newton (2775 lbf) force on the armature for its 0.0008 second barrel traverse.

[0014] The magnetic fields of the electromagnetic propulsion devices in the above noted parent application Ser. No. 10/707,607 and its divisional applications are attributable to both the power rails and the forward and aft wall conductors of wall conductor assembles. Reliance on the power rail's magnetic fields requires the barrel cavity's location between the power rails and the armature's propulsion bus (i.e. the armature's current path between the power rails) to a path between and orthogonal said rails and when coupled with the use of wall conductors magnetic fields which for best effect need to be as close as possible the propulsion bus with as small as possible a deflection angle therewith, requires said cavity to be fairly narrow.

BRIEF SUMMARY OF THE INVENTION

[0015] In the topic invention, the barrel power rails are located proximal and parallel and electrically isolated from each other and when there is a barrel rail used in the propulsion bus-aft shunt circuit means said rail is also located proximal, parallel and electrically isolated from said power rails. With this arrangement of barrel rails the magnetic fields of the currents in said rails interacting with the current in an armature's propulsion bus largely cancel each other, and the net force on the propulsion bus resultant said magnetic fields interaction with the current in said bus is negligible.

[0016] The electromagnetic forces which propel an armature in the invention are resultant the interaction with the electric current (hereinafter current) in the armature's propulsion bus with the magnetic fields of the currents in the forward and aft wall conductors of the wall conductor assembly. Without the constraints imposed by the requirement of a rail device that of the armature and its propulsion bus be between the power rails, a very large variety of barrel cavity and armature profiles, both symmetric and asymmetric become possible. As long as a continuous propulsion bus at the armature's circumferential surface closely proximal the cavity's wall and the wall conductors therein is possible, the motive force propelling the armature in the barrel cavity is possible and the longer the armature's propulsion bus and the wall conductor assembly's wall conductors, the greater the propelling force will be per ampere current.

BRIEF DESCRIPTION OF THE SEVERAL VIEWS OF THE DRAWINGS

[0017] FIG. 1 is a oblique view of the breech end of a shortened device of the invention with a armature;

[0018] FIG. 2 is an oblique partially cut away view illustrating elements of the FIG. 1 device and their arrangement with an armature in the barrel cavity;

[0019] FIG. 3 is a oblique view into the barrel's cavity towards the breech;

[0020] FIG. 4 is an oblique view of the barrel in FIG. 1 shortened and disassembled;

[0021] FIG. 5 is an oblique view of an armature for the device in FIG. 1;

[0022] FIG. 6 is an oblique view of the armature in FIG. 5 disassembled;

[0023] FIG. 7 is an oblique cutaway view of the device in FIG. 1 with an armature in its barrel cavity to illustrate the current path therein;

[0024] FIG. 8 is an oblique view of a breech end section of the rail assembly used in the FIG. 1 device;

[0025] FIG. 9 is an oblique view of an armature which include a current bus as the propulsion bus aft shunt circuit means;

[0026] FIG. 10 is an oblique view of the armature in FIG. 9 disassembled;

[0027] FIG. 11 is an oblique view of a breech end section of the rail assembly used in the FIG. 1 device that uses FIG. 9 armatures;

DETAILED DESCRIPTION OF THE INVENTION

[0028] Slight variations in the cavity's profiles in barrel cavity right sections taken at the openings in the barrel cavity walls for wall conductor's contact means and said means therein, are disregarded and sections taken to the central cavity axis throughout the cavity are considered alike; i.e. cavity's profiles in right section planes to said cavity axis are alike.

[0029] The cavity's central axis is through the centroid centers of the cavity's profile in said right sections. Generally the central axis of an element is the line through the centroid centers of right sections taken through said element along a path in which said element's structure is uniform; e.g. the central axis of a barrel power rail is through the centroid centers of right sections (profiles) to the rail taken along its length other then where said rail has power take input means.

[0030] In this invention, an armature is electromagnetically propelled from breech to muzzle in the barrel cavity by the interaction of the armature's propulsion bus current with the magnetic fields of the currents in barrel wall conductors located immediately forward and aft said bus during the armature's barrel cavity traverse.

[0031] The propulsion bus of the armatures for the devices is oriented orthogonal the armature's axis and, when in the barrel cavity, to the armature's direction of barrel cavity traverse and the barrel cavity's axis. Said propulsion bus extends around most of the armature's perimeter at its surface proximal the barrel cavity's wall surface.

[0032] Armatures for the device also includes a forward current shunt and an aft current shunt in its surface proximal the barrel cavity surface. With an armature in the barrel cavity, the armature's forward current shunt is located on the muzzle side of the propulsion bus and is electrically insulated from direct electrical continuity with the rest of the armature and the aft current shunt is located on the breech side of the propulsion bus and is also insulated from direct electrical continuity with the rest of the armature except when the propulsion bus-aft shunt circuit means of the device is a current bus in the armature connecting the aft current shunt with the shunt proximal end of the armature's propulsion bus.

[0033] The device includes a wall conductor assembly in its barrel cavity wall. The wall conductor assembly is comprised of an array of parallel, spaced, equal length barrel wall conductors; i.e. wall conductors. The wall conductors are oriented orthogonal the barrel cavity axis and located at or very close to the barrel cavity surface. Said assembly extends the length of the barrel cavity in which the device is extant and includes a barrel bus in the barrel cavity wall. The barrel bus extends parallel the barrel power rails its length.

[0034] Each wall conductor of said array of wall conductors has electrical continuity at one end with the barrel bus and at its other end with a contact means in a mating opening into the barrel cavity. During an armature's traverse of the barrel cavity, wall conductors that are forward the armature's propulsion bus and which have electrical continuity with the armature's forward current shunt are forward wall conductors. Said electrical continuity is extant during the forward shunt's traverse past the cavity locations of each said wall conductor's contact means. Wall conductors that are aft the armature's propulsion bus and which have electrical continuity with the armature's aft current shunt are aft wall conductors. Said electrical continuity is extant during the aft shunt's traverse past the cavity locations of each said wall conductor's contact means. The barrel bus maintains electrical continuity between the group of one or more wall conductors comprising the forward wall conductors and the group of one or more wall conductors comprising the aft wall conductors, at any instant, during an armature's traverse of the barrel cavity.

[0035] The topic device also has two barrel power rails, each with a connection means for connection to the terminals of an outside power supply. During an armature's traverse of the barrel cavity one of the power rails has continuous sliding electrical continuity with forward current shunt surface and the second barrel power rail has continuous sliding electrical continuity with the end of the armature's propulsion bus thereto proximal.

[0036] With an armature in the barrel cavity, a series circuit comprised of the barrel power rail that has sliding continuity with the armature's forward current shunt, the armature's forward current shunt, the forward wall conductors, the wall conductor assembly' barrel bus, the aft wall conductors, the armature's aft current shunt, the propulsion bus-aft shunt circuit means--said circuit means maintains electrical continuity between the armature's aft current shunt and the end of the armature's propulsion bus-, the propulsion bus there to proximal and the second barrel power rail is extant. With power supplied to the device via the power rails' connection means, the magnetic fields of the forward and aft wall conductors' currents interact with the current in the armature's propulsion bus propelling the armature through the barrel cavity from breech to muzzle.

[0037] With the device energized and an armature in the barrel cavity, the magnetic fields of a current element at the intersection of an axis plane [i.e. a plane containing the cavity axis] with a conducting wall conductor interacts with the current element at the intersection of said plane with the propulsion bus, creating forces therein with cavity axis parallel muzzle directed components that propel the armature in the barrel cavity. The axis plane intersects the propulsion bus a second time where said bus is extant at Tr radians distance about the armature's axis from the first intersection and the magnetic fields of the topic wall conductor current element interacts with the current element at the second intersection creating forces therein with components parallel the cavity axis and breech directed. The current element at the second intersection is at a significantly greater radius and has a greater deflection angle from the topic wall conductor's current element; therefore, the forces produced in the second intersection can usually be ignored. One of the advantages of this embodiment is that it permits electromagnetic propulsion in a vast array of symmetric and asymmetric cavity and armature profile designs.

[0038] The force in newtons on armatures for the topic device with a cylindrical cavity is given by the general simplified equation with a cross product integrand: Force = 2 .function. [ .9 .times. .intg. .beta. 0 .beta. 1 .times. I pb .times. r pb .times. d .theta. .times. ( .mu. 0 .times. I wc / ( 2 .times. .pi. ) ) .times. ( Cos .times. .times. .alpha. / d wc - pb ) ] 3 )

[0039] l.sub.pb is the armature's propulsion bus current. l.sub.wc is the total aft wall conductors' current or the total forward wall conductors' current; i.e. l.sub.pb=l.sub.wc. The 2 before the bracketed terms accounts for the interaction with the armature's propulsion bus current, l.sub.pb, with the magnetic fields' of the currents in both the forward and aft wall conductors creating the armature's propulsion force. The 0.9 in the bracketed term is an attenuation term compensating for the effect of the magnetic field of a wall conductor's current element on the second propulsion bus's current element, when extant, located Tr radians arc distance about the armature's axis from the primary intersection. The propulsion bus is at the cylindrical surface of the armature and oriented orthogonal the cavity's and armature's axes at radius r.sub.pb. The length in meters of the armature's propulsion bus on whose current the wall conductors' magnetic fields act is the integral of r.sub.pb d.theta. through angle .beta..sub.1-.beta..sub.0, where .beta..sub.0 is the angular location about the armature's axis of the propulsion bus where it has electrical continuity with the propulsion bus-aft shunt circuit means, and .beta..sub.1 is the angular location about the armature's axis of the propulsion bus at its sliding continuity with the barrel power rail. Permeability of free space, .mu..sub.0, is 4.pi..times.10.sup.-7 Henries/meter. The distance between a current element at an axis plane's intersection with a wall conductor and the current element at said axis plane's intersection with armature's propulsion bus is d.sub.wc-pb and said distance has deflection angle .alpha. from a cavity axis parallel line. The Cos .alpha. term is the force component directed parallel the cavity axis. Both d.sub.wc-pb and Cos .alpha. in the (Cos .alpha.)/d.sub.wc-pb term vary for each wall conductor as said conductor's contact means are traversed by the armature's current shunt and a mean effective value approximation for (Cos .alpha.)/d.sub.wc-pb may best be achieved by computer iteration.

[0040] The topic device has a barrel and a cavity through the barrel with a breech end and a muzzle end. The cavity profile in right section planes through the barrel cavity throughout the cavity's length are uniform and slight variations in said profiles at sections taken through the contact means and said means openings into the cavity are disregarded; i.e. throughout the length of the cavity, the cavity profile in planes perpendicular the cavity axis are alike. With power supplied to the device, an armature in or inserted into the breech end of the cavity is propelled through the cavity towards and out of the cavity's muzzle end. The central axis of an armature in the barrel cavity is parallel and close or coincident with the barrel cavity's central axis. All armature profiles in right section planes taken to the armature's axis are smaller than the barrel cavity's right section plane profile and a portion of said armature's right section plane profiles are similar to said barrel cavity's profile in shape and slightly undersized thereof to permit unobstructed traverse of the barrel cavity by the armature.

[0041] The device has two barrel rails that are power rails. The power rails extend from proximal the barrel cavity's breech end to proximal the barrel cavity's muzzle end and are located in the barrel cavity wall along the same length of barrel, parallel each other, and proximal and electrically insulated from each other and each power rail has a continuous surface along its length that is part of the barrel cavity surface and extends the length of the barrel through which the device propels an armature. Each power rail has a connection means for the attachment of circuitry to an outside power source.

[0042] The barrel walls also contain a wall conductor assembly. The wall conductor assembly includes a barrel bus that is located in the barrel wall and, like said power rails, extends from proximal the barrel cavity's breech end to said cavity's muzzle end and is parallel the power rails. Said barrel bus is in close proximity one of said power rails and electrically insulated from both power rails.

[0043] The wall assembly also includes an array (i.e. a plurality) of like length parallel wall conductors in the barrel cavity wall which are separated from each other in a distribution along the length of the barrel bus and located at or very near the barrel cavity surface and each wall conductor has at one end electrical continuity with said barrel bus. Said wall conductors might have slight variations in length to better distribute the wear of a cavity traversing armature's current shunts.

[0044] Each wall conductor extends from proximal the barrel bus, circumscribing within the barrel cavity wall most of the cavity, to close proximity without contact with the barrel power rail distal the barrel bus. At said power rail proximal location, each wall conductor has and is electrically continuous with an electrical contact means in a mating opening into the barrel cavity. Except when an armature's current shunt is located at a wall conductor's contact means, the wall conductors, beyond the barrel bus, are electrically insulated from their surroundings.

[0045] An armature for the device has a propulsion bus which when in the barrel cavity is oriented therein to travel in close proximity to the wall conductors of the wall conductor assembly and carry current in a direction parallel to said wall conductors and orthogonal to said cavity's central axis. During an armature's barrel cavity traverse its propulsion bus's current flow is orthogonal the direction of the armature's barrel cavity traverse.

[0046] The propulsion bus of an armature in the barrel cavity is within and very close to or at the armature's surface proximal the barrel cavity's surface and extends from its end with electrical continuity the barrel power rail proximal the barrel bus to its end at the propulsion bus-aft shunt circuit means with which it also has electrical continuity. With armature's movement in the barrel cavity, said barrel power rail continuity is sliding.

[0047] An armature for the device has a forward current shunt that when in the barrel cavity is located on the muzzle side of the propulsion bus and proximal the power rail distal the wall assembly's barrel bus. Said forward current shunt has surface in the armature that has continuous electrical continuity with the wall conductor assembly via the contact means of each wall conductor of the group of one or more wall conductors comprising the forward wall conductors, at any instant, at the barrel cavity location of said shunt's surface. Said forward current shunt also has surface with continuous electrical continuity with its proximal power rail via said rail's barrel cavity surface. With an armature's movement in the barrel cavity the above said continuous electrical continuities are continuous sliding electrical continuities.

[0048] During an armature's barrel cavity traverse, surface of its forward current shunt has continuous sliding electrical continuity with the wall conductor assembly from breech to muzzle. Said continuity is resultant the continuous sliding electrical continuity said surface has sequentially with successive wall conductors comprising the forward wall conductors of the wall conductor assembly via their contact means as said contact means pass with continuous sliding electrical continuity across the forward current shunt's surface as said surface passes the barrel cavity locations of said contact means. The forward current shunt of an armature in or traversing the barrel cavity thus maintains continuous electrical continuity between the proximal power rail and each wall conductor comprising at any instant the forward wall conductors of the wall conductor assembly.

[0049] The forward current shunt, except for its electrical continuity with the proximal power rail and its electrical continuity via the contact means of each wall conductor of the group of wall conductors comprising the forward wall conductors at any instant, is electrically insulated from the rest of the armature and barrel.

[0050] The armature also has an aft current shunt that is, with the armature in the barrel cavity, located on the breech side of the armature's propulsion bus. Said aft current shunt maintains continuous electrical continuity with propulsion bus-aft shunt circuit means and when said means includes a third rail, said shunt has surface that, when in the barrel cavity, has continuous electrical continuity said third rail.

[0051] The aft current shunt has surface in the armature that, when in the barrel cavity, has continuous electrical continuity with the wall conductor assembly via the contact means of each wall conductor of the group of one or more wall conductors comprising the aft wall conductors, at any instant, at the barrel cavity location of said shunt surface. With an armature's movement in the barrel cavity the above said continuous electrical continuities are continuous sliding electrical continuities.

[0052] During an armature's barrel cavity traverse, surface of its aft current shunt has continuous sliding electrical continuity with the wall conductor assembly from breech to muzzle and said continuity is resultant the continuous sliding electrical continuity said surface has sequentially with successive wall conductors comprising the aft wall conductors of the wall conductor assembly via their contact means as said contact means pass with continuous sliding electrical continuity across the aft current shunt's surface as said surface passes the barrel cavity locations of said contact means.

[0053] The aft current shunt of an armature in or traversing the barrel cavity thus maintains continuous electrical continuity between the propulsion bus-aft shunt circuit means and the wall conductors comprising the aft wall conductors, at any instant, of the wall conductor assembly.

[0054] The device has a propulsion bus-aft shunt circuit means that is either a short current bus in the armature that has physical and electrical continuity with both the aft current shunt and the end of the armature's propulsion bus thereto proximal, or a third barrel rail that: extends from proximal the barrel cavity's breech end to said cavity's muzzle end, has continuous barrel cavity surface its length, is parallel to, and insulated from the power rails.

[0055] When the propulsion bus-aft shunt circuit means includes a third barrel rail, and an armature is in the barrel cavity, continuous electrical continuity is maintained between the armature's propulsion bus and aft current shunt via the continuous electrical continuity of the third rail's cavity surface with surface on the aft current shunt and surface on the propulsion bus thereto proximal.

[0056] With an armature in the barrel cavity, the armature's propulsion bus, except for its electrical continuity with the barrel power rail and its electrical continuity with the propulsion bus-aft shunt circuit means, is electrically insulated from the rest of the armature and barrel. The armature's aft current shunt, except for its electrical continuity with each wall conductor comprising the aft wall conductors, at any instant, via said conductors' contact means and its electrical continuity with the propulsion bus via the propulsion bus-aft shunt circuit means, is electrically insulated from the rest of the armature and barrel.

[0057] With an outside power source connected to the terminals of the power rails and an armature in or inserted into the barrel cavity of the device where said barrel rails and wall assembly are, the electric current path in the device effecting electromagnetic propulsion of the armature in the barrel cavity towards the muzzle is extant and remains so while the armature is completely in the barrel cavity where said rails and wall assembly are. The magnetic fields resultant the electric current in the forward and aft wall conductors of the wall conductor assembly interact with the current flow through the armature's propulsion bus creating forces therein with cavity axis parallel, muzzle directed components which propel the armature in the barrel cavity towards the muzzle.

Current path Description

[0058] With an armature in the barrel cavity and the connection means of the power rail with continuous electrical continuity the armature's forward current shunt connected to the positive terminal of an outside power supply and the other said power rail's connection means connected to said power rail's return terminal, the current's path through the device is complete. The current path is from said power rail connected to the positive terminal of the outside power supply, through said forward current shunt to the group of one or more wall conductors of the wall conductor assembly comprising the forward wall conductors of said assembly, at any instant, via the continuous electrical continuity of said wall conductors contact means with the armature's forward current shunt's surface at their barrel cavity location.

[0059] The current path continues in the forward wall conductors--which are always located immediately in front (i.e. on the muzzle side) of the propulsion bus of an armature in the barrel cavity--to the wall conductor assembly's barrel bus wherein it has a breech direction and the magnetic fields of the currents in the forward wall conductors interact with the armature's propulsion bus current creating forces in said propulsion bus With cavity axis parallel, muzzle directed components; i.e. the armature's propulsion bus appears to be attracted to the forward wall conductors.

[0060] The current path continues from said assembly's barrel bus to the group of one or more wall conductors of said wall conductor assembly comprising the aft wall conductors--which are always located immediately aft (i.e. on the breech side) of the propulsion bus of an armature in the barrel cavity--and therefrom via the electrical continuity of said aft wall conductors contact means with the armature's aft current shunt surface at their barrel cavity location to the propulsion bus-aft shunt circuit means. The magnetic fields of the currents in said aft wall conductors interact with the armature's propulsion bus current creating forces in said propulsion bus with cavity axis parallel, muzzle directed components; i.e. the armature's propulsion bus appears to be repelled by said aft wall conductors.

[0061] The current's path continues in said propulsion bus-aft shunt circuit means from said aft current shunt to the propulsion bus's end distal its end with power rail continuity and in said propulsion bus to its end with continuous power rail continuity. The current path through said propulsion bus has the same direction about the armature as the current path in forward wall conductors and opposite the current path direction in aft wall conductors. The current path continues in said power rail through its connection means to the return terminal of the outside power supply.

[0062] Said propulsion bus-aft shunt circuit means is either a current bus between and connecting the aft current shunt and the propulsion bus's end thereto proximal or comprised: an additional barrel rail which extends between the cavity's breech and muzzle ends with cavity surface its length and located proximal, isolated from and parallel said power rails, and an additional surface on the aft current shunt of an armature in the barrel cavity that has continuous electrical continuity with said addition rail's cavity surface, and a surface on the propulsion bus of said armature that also has continuous electrical continuity with said additional rail's cavity surface.

[0063] With the positive terminal of the outside power supplied connected to the connection means of the power rail with continuous electrical continuity with the armature's propulsion bus, the current path is from said power rail to the propulsion bus and therein towards the propulsion bus-aft shunt circuit means proximal the armature's current shunts.

[0064] The current path continues from the propulsion bus through the propulsion bus-aft shunt circuit means to the aft wall conductors of the wall conductor assembly wherein it has barrel bus direction; i.e. the current direction in the aft wall conductors is opposite its direction in the armature's propulsion bus. The magnetic fields of the currents in the aft wall conductors interact with the propulsion bus current creating therein forces with barrel cavity axis parallel, muzzle directed components; i.e. the aft wall conductors appear to repel the armature's propulsion bus.

[0065] Current path continues from the aft wall conductors via the wall conductor assembly's barrel bus to the forward wall conductors of said assembly and therein towards said conductors' electrical continuity with the armature's forward current shunt and the direction of current in the forward wall conductors is the same as the current direction in the armature's propulsion bus. The magnetic fields of the currents in the forward wall conductors interact with the current in the propulsion bus creating forces in the propulsion bus with cavity axis parallel, muzzle directed components; i.e. the armature's propulsion bus appears to be attracted to the wall conductor assembly's forward wall conductors. The current path continues through said forward current shunt to its proximal power rail and therein, via said rail's connection means to the return terminal of said outside power supply.

[0066] Regardless the polarity of the power rails with respect to each other, the current in the aft wall conductors of the wall conductor assembly is always oppositely directed the current in the armature's propulsion bus and the current in the forward wall conductors of said assembly is always like directed the current in said propulsion bus. The collection of said cavity axis parallel muzzle directed force components in the armatures propulsion bus due to the interaction of the magnetic fields of the currents in the forward and aft wall conductors of the wall conductor assembly with said propulsion bus current propels the armature in the barrel cavity towards the cavity's muzzle end.

General Design Considerations

[0067] The right section barrel cavity profiles at the contact means and their cavity surface ports may have slight irregularities; however, these irregularities are disregarded herein and said right section barrel cavity profiles, regardless said irregularities, are regarded as the same as all other right section barrel cavity profiles.

[0068] Mathematical expressions used herein; e.g. perpendicular, tangent, parallel, etc., to describe physical characteristics, spacial orientations etc., are limited in their accuracy to the practical limitation of any of the manufacturing and assembly methods that might be used for the device.

[0069] The figures herein are not drawn to scale but are sized and shaped to better illustrate the invention's arrangement of parts and their functions. For example the wall conductors of the wall conductor assembly could be arranged as a single row of tightly packed thinly insulated magnetic wires rigidly fixed to the cavity shell (or comprising the shell) and the armature's propulsion bus a larger diameter rigidly fixed wire at the armature's surface and circumscribing the armature's body. This arrangement reduces the radius at which the magnetic fields of the wall conductors' currents act on the propulsion bus.

[0070] The barrel power rails might extend beyond the invention in either direction as a source of power for operations in the barrel and barrel cavity not part of the invention. The barrel bus in like manner might extend beyond the invention as a possible signal source for operations in the barrel and barrel cavity not part of the invention.

[0071] When the propulsion bus-aft shunt circuit means is a short current bus in the armature between the aft current shunt and the end of the propulsion bus proximal said shunt, the magnetic fields of the barrel power rails interact with said bus's current creating forces therein with components orthogonal to the barrel cavity's axis. When armature's current bus is oriented parallel to the armature's axis and when in the barrel cavity located in the barrel cavity midway between the barrel power rails, said orthogonal force components collectively resolve into a tangential force about the armature's axis at the current bus center line radius. Said tangential force is always directed towards the power rail at the forward current shunt and away from the power rail at the armature's propulsion bus. This force might therefore be used to aid armature rotation during traverse of the barrel cavity, rotation which is otherwise effected by the barrel cavity surface. When the propulsion bus-aft shunt circuit means for a barrel cavity traversing armature is comprised of a third barrel rail that has continuous sliding continuity with both the aft current shunt and the armature's propulsion bus said tangential force on the armature is eliminated.

[0072] Beyond the barrel bus of the wall conductor assembly, wall conductors are isolated from one another throughout their length when not sharing a common current shunt at their ends distal the barrel bus. Said isolation is effected by insulating barrel material, and/or insulating coating, and/or sleeves, or less preferably clearance gaps (air).

[0073] There can be one or more wall conductors or the equivalent sum in cross section areas to one or more wall conductors in contact with the each armature current shunt.

[0074] The forward and the aft wall conductors are each comprised of a group of one or more wall conductors or the equivalent sum in cross section areas to one or more wall conductors whose contact means have continuity with the forward and aft current shunts, respectively, at any instant.

[0075] Although the wall conductors of the wall conductor assembles herein illustrated are distributed uniformly along the length of the wall assembly's barrel bus and have constant cross section areas, the wall conductor cross section areas and their spacing might vary along the length of the assembly. E.g. In a device where barrel mass and durability are design constraints, to avoid wall conductor failure due to prohibitive heat and resistance build up, the cross section area of a wall conductor at the breech end of the cavity might be many times a wall conductor's cross section area at the muzzle. This area variation compensates for the longer wall conductor conduction time intervals at the cavity's breech region. The wall conductor distribution density along the barrel bus might also be greater at the breech than the muzzle end of the barrel cavity; i.e. the wall conductors would no longer have a uniform distribution along the barrel bus.

[0076] For clarity of presentation, the invention embodiments portrayed in the included figures are chemically bonded together in assembly. In practical applications and for quick refurbishment or repair, the embodiments would be assembled using mechanical fastening means well known in the arts.

[0077] Molding methods also well known in the arts can be used for barrel, armature fabrication and coil encasement.

[0078] An armature's propulsion bus and current shunts whose operational life is measured in milliseconds and fractions thereof can be simple formed pieces of sheet Aluminum or Copper alloy or, mass restrictions permitting, other conducting alloy.

[0079] As a safety measure the propulsion bus could be designed to melt or burst open from heat after the anticipated armature's barrel cavity traverse time has elapsed.

[0080] Voids and masses necessary to locate an armature's center of mass for in flight stability are not shown in the figures.

[0081] The armatures and barrel for the devices are made of electrically non-conducting materials such as SiC or high strength proprietary plastics. The wall conductor assembly and barrel rails are made of good conducting material such as copper, aluminum or iron alloys.

[0082] The wall conductors experience rapid field reversal during barrel cavity traverse by an armature and any residual magnetic energy (polarization) stored in proximal structure material will have attenuating effects on the wall conductor's magnetic field.

[0083] Generally, in regards the various embodiments of the invention, surfaces of elements of the invention having sliding electrical continuity with other elements thereof might be treated and/or machined and/or formed to effect a smooth more effect sliding continuity; e.g. a surface with boundary edges could have those edged rounded and the surface could be treated with low friction conducting substances and/or textured to assure a correct current path when elevated voltages are extant in the invention.

[0084] The armature may have variations in its surface extruded parallel to its axis; e.g. Corrugated surfaces with troughs parallel to the armature's axis.

[0085] The barrel and its cavity used by the device may extend at the muzzle and/or breech beyond the electromotive propulsion elements of the invention and in said extensions the armature may or may not be acted on by additional motive, orientation, and material modifying devices or other devices not part of the invention; i.e. the invention may share a common barrel and barrel cavity with other devices not necessary to or part of the invention.

Terminology

[0086] AFT CURRENT SHUNTS: An aft current shunt is a conductor carried in the armature's breech section and with the armature in the barrel cavity an aft current shunt is proximal the barrel bus distal power rail and has surface proximal the barrel cavity's surface and the wall conductor assembly therein and said surface has electrical continuity with said assembly's contact means at its barrel cavity location and thereby the wall conductors of said contact means and said wall conductors are the aft wall conductors when said continuity is extant.

[0087] AFT WALL CONDUCTOR: With an armature for the device in the barrel cavity, the aft wall conductors is the group of one or more consecutive wall conductors which have at any instant continuous, or continuous sliding electrical continuity, via their contact means at the barrel cavity, with an armature's aft current shunt surface at the barrel cavity location of said contact means.

[0088] ARMATURE CENTRAL AXIS: The armature's central axis is the line through the area centroid centers of right sections of that portion of the armature in the barrel cavity which has right sections identical in shape to barrel cavity's right sections but slightly undersized thereof. The armature's central axis in the barrel cavity is coincident with the barrel cavity's central axis or parallel and closely proximal said axis. Alternatively the armature's central axis is the line at the armature that, when in the barrel cavity, is coincident the barrel cavity's central axis.

[0089] AXIAL PLANE or AXIS PLANE: A plane that is coincident with an axis; e.g. an axial plane of the barrel cavity completely contains the barrel cavity axis.

[0090] BARREL AXIS: A barrel axis is any line through the barrel that is parallel or coincident with the barrel cavity's central axis and said central axis is a barrel axis.

[0091] BARREL AND BARREL CAVITY: As the barrel and barrel cavity containing the invention might extend beyond the array of wall conductors of the wall conductor assembly in both the breech and muzzle directions, the right section plane through the muzzle proximal edge of the wall conductor assembly's wall conductor closest to the muzzle is designated the muzzle end or muzzle end opening of the barrel and barrel cavity of the invention, as electric circuit effecting an armature's acceleration through the barrel cavity of the invention is open when the armature's forward current shunt is beyond this point in its barrel cavity traverse.

[0092] The right section plane through the breech proximal edge of said assembly's wall conductor closest to the breech is designated the breech end or breech end opening of the barrel and barrel cavity of the invention as the armature's aft current shunts must have electrical continuity with said wall conductor to initially complete the electric circuit for the armature's acceleration through the barrel cavity of the invention. Therefore, the length along the barrel's length occupied by the wall conductor assembly's array of wall conductors is the invention's length and location along the length of a barrel and barrel cavity which includes the invention.

[0093] BARREL BUS AND RAIL LENGTH AND LOCATION: The length and location along the barrel cavity length of the two power rails and the additional barrel rail, when extant, might vary slightly from one another in a design. Therefore, the spacial and size relationships between barrel rails and barrel bus herein are described using the terms `like` or `similar`.

[0094] E.g. The barrel bus distal power rail (i.e. the power rail that has sliding continuity with an armature's forward current shunt) might at the breech be shortened or displaced in the muzzle direction by as much as the distance between the breech proximal edge of an armature's aft current shunt and the breech proximal edge of said armature's forward current shunt. The barrel bus proximal power rail (i.e. the power rail that has sliding continuity with an armature's propulsion bus) might at the breech be shortened or displaced in the muzzle direction by as much as the distance between the breech proximal edge of an armature's propulsion bus and the breech proximal edge of said armature's aft current shunt. The third rail, when extant, of the propulsion bus-aft shunt circuit means might be shortened at the muzzle or displace in the breech direction by as much as the distance between the muzzle proximal edge of an armature's forward current shunt and the muzzle proximal edge of said armature's propulsion bus. The barrel buses might be shortened at their breech and muzzle ends by as much as the width of the wall conductors at said ends while retaining continuity therewith.

[0095] BARREL RAIL: A barrel rail is a conductor in the barrel cavity wall, which is parallel to all other barrel rails and can have a twist at constant radius about said axis, and extends the length of the barrel of the invention and has barrel cavity surface along its length. The power rails and the addition rail of the propulsion bus-aft shunt circuit means, when extant, are barrel rails.

[0096] CAVITY AXIS: A cavity axis is a line through the barrel cavity that is parallel or coincident with the cavity's central axis. The cavity's central axis is a cavity axis.

[0097] CAVITY'S CENTRAL AXIS: The cavity's central axis is the line through all barrel cavity right section area centroid centers.

[0098] CONTACT MEANS: Although shown herein as a surface on a wall conductor's projection into the barrel cavity, a wall conductor contact means can be a separate entity such as a pin, electric motor type brush assembly or other structure mounted on the wall conductor or mounted in the cavity wall proximal the barrel bus distal end of the wall conductor with a lead for electrical continuity therewith.

[0099] DIAMETRIC PLANE: A diametric plane is any plane perpendicular to an axis; i.e. a right section plane

[0100] ELECTRICAL ISOLATION: An element that is electrically isolated or an isolated element is limited in meaning to lacking low resistance direct electrical paths to a neighboring element; i.e. the electrically isolated element is electrically insulated from its neighbor; however, an element can be electrically isolated from one element while having electrical continuity therewith through another element that it is not electrically isolated from and that in turn has direct or indirect continuity with said isolated element. Magnetic and electric fields couplings are ignored.

[0101] FORWARD CURRENT SHUNTS: A forward current shunt is a conductor carried in the armature's muzzle section and with the armature in the barrel cavity its forward current shunt is proximal the barrel bus distal power rail and has surface with electrical continuity therewith and has surface proximal the barrel cavity's surface and the wall conductor assembly therein and said surface has electrical continuity with said assembly's contact means at its barrel cavity location and thereby the wall conductors of said contact means and said wall conductors are the forward wall conductors when said continuity is extant.

[0102] FORWARD WALL CONDUCTOR: With an armature for the device in the barrel cavity, the forward wall conductors are the group of one or more consecutive wall conductors that have at any instant continuous, or continuous sliding electrical continuity, via its contact means at the barrel cavity, with an armature's forward current shunt's surface at the barrel cavity location of said contact means.

[0103] LFMTB: Looking from the muzzle towards the breech.

[0104] ORTHOGONAL: The terms `orthogonal` and `orthogonal to` indicate perpendicular orientation of the space occupied by one element to the space occupied by a second element with or without intersection there between or perpendicular orientation in space between two direction vectors with or without intersection there between or perpendicular orientation in space between the space occupied by one element and a direction vector with or without intersection there between or perpendicular orientation in space of a line with another line or an element's space or vector with or without intersection there between.

[0105] POWER RAIL: A power rail is a barrel rail which has connection means to outside the device for attachment of the outside power supply which supplies the electric power required for operation of the claimed device.

[0106] RIGHT SECTIONS: The lines formed, and their shape and enclosed area, in a diametric plane or right section plane to an object by the intersection of the object's surfaces with said plane are referred to herein as right sections and right section profiles.

[0107] TWIST: Normally, the collection of differential area elements (rd.theta.dr) comprising the profiles of the barrel in consecutive right section planes taken at incrementally increasing distance from a barrel reference point have like shape and area at fixed radii to a barrel cavity's axis common to all said differential area elements [the axis about which each differential area element (rd.theta.dr) is generated] and constant angles about said axis relative to each other and relative to a fixed axial reference plane of the barrel.

[0108] In armatures for use in said barrel, the collection of differential area elements (rd.theta.dr) comprising the profiles in consecutive right section planes taken at incrementally increasing distance from a reference point on the armature have like shape and area at fixed radii to the armature's axis common to all said differential area elements [the axis about which each differential area element (rd.theta.dr) is generated] and constant angles about said axis relative to each other and a fixed axial reference plane of the armature.

[0109] The collection of differential areas (rd.theta.dr) comprising the profiles in consecutive right sections of a barrel with a twist taken at incrementally increasing distance from a barrel reference point have like shape and area at fixed radii to the barrel cavity axis common to all said differential area elements [the axis about which each differential element (rd.theta.dr) is generated] and constant angles about said axis relative to each other and incrementally increasing angular displacement about said axis with reference said axial reference plane. The rate of increasing angular displacement of the collection of differential areas (rd.theta.dr) comprising said right section profiles relative to said axial reference plane is constant; i.e. [.phi..sub.i-.phi..sub.o]/[d.sub.i-d.sub.o]=constant, where .phi..sub.o and d.sub.o are any initial angle of said group of differential area elements comprising said right section profile about their axis relative to the axial reference plane and its distance along the axis, respectively, and .phi..sub.i and d.sub.i are said group's instant angle to said axial reference plane about said axis and instant distance along the axis, respectively.

[0110] In armatures with a twist for use in said barrel with a twist, the collection of differential area elements (rd.theta.dr) comprising the profiles in consecutive right section planes taken at incrementally increasing distance from an armature reference point have like shape and areas at fixed radii to the armature axis common to all said differential area elements [the axis about which each differential area element (rd.theta.dr) is generated] and constant angles about said axis relative to each other and incrementally increasing angular displacement about said axis with reference said armature's axial reference plane. The rate in angle increase per axis distance between said profiles and said armature's axial reference plane is constant and equal to the rate of angle increase between said barrel profiles and said barrel axial reference plane.

DETAILED DESCRIPTION OF THE DRAWINGS

[0111] FIG. 1 is portrays the invention's barrel with an armature 32 for the use therein located at the breech end of the device. Indicated are the barrel's two sections 11 and 11a and the barrel cavity 33 and its extension 33a at the breech end of the barrel. Also indicated are the power connection means 31 and 28 of power rails 30 and 27, respectively, to outside the device.

[0112] FIG. 2 is the device in FIG. 1 shortened and cutaway to illustrate the arrangement of its various parts with an armature 32 in the barrel's cavity 33. In the figure cavity shell 20 with barrel cavity 33 is retained within the wall conductor assembly 16 which in turn, along with barrel rail subassembly 25, is rigidly retained in mating open channeling (best seen in FIG. 4) in barrel sections 11 and 11a in the assembled device.

[0113] Barrel rail subassembly 25 along with power rails 27 and 30 and barrel rail 24 of the propulsion bus-aft shunt circuit means mounted therein is indicated. Wall conductor assembly 16 is indicated circumscribing barrel cavity shell 20 with its wall conductors 18 extending from barrel bus 17 and circumscribing most of the barrel cavity shell 20 and the barrel cavity 33 and armature 32 therein.

[0114] One of the array of wall conductors 18 of said assembly 16 is indicated along with one of the array of contact means 19 of said assembly 16. Each wall conductor 18 has a contact means 19 which extends into the barrel cavity 33 through a mating opening 21 in the cavity shell 20. The forward and aft current shunts, 34 and 37, respectively, along propulsion bus 41 of armature 32 in the barrel cavity 33 are indicated.

[0115] Each contact means 19 at the barrel cavity location of the armature's forward current shunt 34 has continuous electrical continuity with surface of said shunt and the wall conductor for each said contact means is a forward wall conductor of the wall conductor assembly while said continuity is extant. Each contact means 19 at the barrel cavity location of the armature's aft current shunt 37 has continuous electrical continuity with surface of said shunt and the wall conductor for each said contact means is an aft wall conductor of the wall conductor assembly while said continuity is extant.

[0116] FIG. 3 is a view into the barrel cavity towards the breech and the barrel power rail subassembly at slightly staggered sections to the barrel to better portray the various parts of the invention and their relationships to one another. Indicated is one of the array of wall conductors 18 extending from barrel bus 17 of wall conductor assembly 16, and circumscribing barrel cavity's shell 20 and barrel cavity 33 therein and ending at contact means 19 through opening 21 in shell 20 into the barrel cavity 33. An armature's forward or aft current shunt at the location of a contact means 19 in the barrel cavity has continuous electrical continuity with said contact means and the wall conductor 18 of said means 19. Also indicated is cavity surface 20i of cavity shell 20. Barrel rail subassembly 25 is indicated with power rails 30 and 27 along with barrel rail 24 of the propulsion bus-aft shunt circuit means.

[0117] With an armature in barrel cavity 33, cavity surface 29 of power rail 30 has continuous electrical continuity with surface 36 of the armature's forward current shunt 34 and cavity surface 26 of power rail 27 has continuous electrical continuity with surface 42 of the armature's propulsion bus. Cavity surface 23 of barrel rail 24 has continuous electrical continuity with surface 39 of the armature's aft current shunt 37 and surface 40 of said propulsion bus. Barrel rail 24 and its cavity surface 23 and surface 39 of aft current shunt 37 and surface 40 of the propulsion bus 41 comprise the propulsion bus-aft shunt circuit means in the topic design.

[0118] Also indicated on the barrel rail subassembly 25 or guides 5a, 6a, 7a and 8a, which aid electrical isolation between said rails and which are in guide ways 5, 6, 7 and 8 of an armature in the barrel cavity and therein aid alignment of said armature during its traverse of the barrel cavity.

[0119] FIG. 4 is the barrel of the device in FIG. 1 shortened and disassembled. Indicated are the major barrel elements: barrel sections 11 and 11a, barrel cavity shell 20, wall conductor assembly 16, barrel rail subassembly 25 and the barrel rails 24, 27 and 30, which mount in barrel rail subassembly 25. Barrel sections 11 and 11a have open channels 10 and 10a, respectively, in which wall conductor assembly 16 is retained in the assembled device's barrel and open channels 10b and 10ab in which barrel rail subassembly 25 is retained in the assembled device's barrel. Barrel sections 11 also has channel 10c for connection means 31 of power rail 30 to outside the barrel and barrel section 11a has a similar channel 10d for connection means 28 of barrel power rail 27 to outside the barrel.

[0120] Cavity shell 20 has channels 21 through which mating contact means 19 of the wall conductor assembly extend into the barrel cavity 33. The internal surface 21i of cavity shell 20 is the surface of barrel cavity 33 and external surface 21e of the cavity shell 20 is circumscribed by wall conductor assembly 16 in the assembled barrel.

[0121] Wall conductor assembly 16 is indicated along with said assembly's barrel bus 17 and one wall conductor 18 of said assembly's array of wall conductors 18 along with one contact means 19 of said assembly's array of contact means 19.

[0122] Barrel rail subassembly has open channels 25a, 25b, and 25c along its length in which mount barrel power rail 27, barrel power rail 30 and barrel rail 24, respectively. Barrel rail subassembly 25 also has channel 25d which in the assembled barrel aligns with channel 10c in barrel section 11 and through which extends connection means 31 of barrel power rail 30 and said assembly also has channel 25e which in the assembled barrel aligns with channel 10d in barrel section 11a and through which extends connection means 28 of power rail 27.

[0123] FIG. 5 is an armature 32 for the device in FIG. 1. Indicated are forward current shunt 34, propulsion bus 41 and aft current shunt 37. With armature 32 in the barrel cavity 33, indicated surface 35 of forward current shunt 34 has continuous electrical continuity with the contact means 19 of the group of one or more wall conductors 18 of the wall conductor assembly 16 at said shunt surface's barrel cavity location and said group of wall conductors comprise the forward wall conductors of the wall conductor assembly.

[0124] Forward current shunt 34 has insulator 9 protecting it from continuity with barrel rail 24 of the propulsion bus-aft shunt circuit means where said shunt crosses said rails path between guide ways 7 and 8 in the armature. Surface 36 of forward current shunt 34 is located between armature guide ways 6 and 7 and thereat has continuous electrical continuity with cavity surface 29 of power rail 30.

[0125] Propulsion bus 41 is located between said forward current shunt 34 and aft current shunt 37 and has insulator 98 which protects it from electrical continuity with the contact means of wall conductors when in the barrel cavity. Surface 40 of propulsion bus 41 is located between guide ways 7 and 8 and with the armature 32 in the barrel cavity 33 the propulsion bus's surface 40 has continuous electrical continuity with the cavity surface 23 of barrel rail 24 of said propulsion bus-aft shunt circuit means. Surface 42 of propulsion bus 41 is located between guide ways 5 and 6 and with the armature 32 in the barrel cavity 33 the propulsion bus's surface 42 has continuous electrical continuity with the cavity surface 26 of barrel power rail 27.

[0126] Indicated surface 38 of aft current shunt 37 has continuous electrical continuity with the contact means 19 of the group of one or more wall conductors 18 of the wall conductor assembly 16 at said shunt surface's barrel cavity location and said group of wall conductors comprise the aft wall conductors of the wall conductor assembly. Surface 39 of aft current shunt 37 is between guide ways 7 and 8 and with armature 32 in barrel cavity 33 has thereat continuous electrical continuity with cavity surface 23 of barrel rail 24.

[0127] With armature 32 in the barrel cavity 33, guides 5a, 6a, 7a and 8a with power rail 27 between guides 5a and 6a and power rail 30 between guides 6a and 7a and barrel rail 24 between guides 7a and 8a of barrel rail subassembly 25 are in and travel in guide ways 5, 6, 7, and 8, respectively, in the armature's surface.

[0128] With armature 32 in barrel cavity 33, barrel rail 24 maintains continuous electrical continuity between the aft shunt's surface 39 and the propulsion bus's surface 40 and said rail and said surfaces constitute the propulsion bus-aft shunt circuit means of the device and power rail 30 maintains continuous electrical continuity with the forward current shunt's surface 36 and the power rail 27 maintains continuous electrical continuity with the propulsion bus's surface 42. The propulsion bus's surface 40, is the propulsion bus's surface proximal its end distal its end with power rail continuity and its surface 42 is its surface with power rail continuity.

[0129] FIG. 6 is the armature in FIG. 5 disassembled. Indicated in addition to features already discussed is open channel 50 which, in the assembled armature, retains forward current shunt 34. Insulator 9 is retained in open channel 9a in forward current shunt 34 and therein protects shunt 34 from continuity with barrel rail 24 when the armature is in the barrel cavity. Forward current shunt with insulator 9 when mounted in the armature supplants and continues the armature's surfaces and guide ways 7 and 8. In the assembled armature propulsion bus 41 is retained in open channel 54 and insulator 98 protects the propulsion bus 41 for electrical continuity with the contact means of wall conductors at or passing across it. In the assembled armature, aft current shunt 37 is retained in open channel 52 and therein supplants and continues the armature's surfaces and guide way 8.

[0130] FIG. 7 is a cutaway view of the armature in the barrel's cavity near the breech to illustrate the currents path through the device. In the figure, the current's path is indicated by italicized letters: `a`, `b`, `c`, `d`, `e`, `f,`, `g`, `h`, `i`, `j`, `k`, `l`, `m`, `n`, and `o`.

[0131] With the positive terminal of an outside power supply connected to power connection means 31, `a` in the figure, of power rail 30 and the return terminal of said power supply connected to power connection means 28, `o` in the figure, of power rail 27, the current path in power rail 30 is from `a` to `b` and continues therein to `c` at the continuous electrical continuity of the cavity surface 29 of power rail 30 with surface 36 of the forward current shunt 34. The current's path continues in forward current shunt 34 from said shunt's surface 36, under said shunt's insulating element 9, which insulates said shunt from barrel rail 24, to said shunt's surface 35; i.e. the current's path continues from `c` to `d` in the figure.

[0132] The current's path continues from the forward current shunt's surface 35 to the group of one or more wall conductors 18 comprising the forward wall conductors of the wall conductor assembly 16, at any instant, via said surface's continuous electrical continuity with each said wall conductor's contact means 19 at or passing across it; i.e. from `d` to `e` in the figure.

[0133] In the forward wall conductors the current's path circumscribes most of the barrel cavity and armature therein immediately forward the armature's propulsion bus 41 in the clockwise direction, LFMTB, and continues from the forward wall conductors to the wall conductor assembly's barrel bus 17; i.e. from `e` to `f` in the figure. The magnetic fields of the currents in the wall conductors comprising the forward wall conductors at any instant, interact with the current in the armature's propulsion bus, which also has clockwise direction, creating forces in the propulsion bus with cavity axis parallel, muzzle directed components; i.e. apparent forces of attraction to the forward wall conductors are created in the armature's propulsion bus.

[0134] In barrel bus 17 the current's path is breech directed to the wall conductors of the wall conductor assembly, comprising the aft wall conductors at any instant, by virtue of the electrical continuity of their contact means 19 with surface 38 of aft current shunt 37; from `f` to `g` to `h` to `i` in the figure. The currents' paths in the wall conductors comprising the aft wall conductors at any instant has counter clockwise direction, LFMTB, about the barrel cavity and armature therein and is always immediately aft the armature's propulsion bus. The magnetic fields of the currents in the aft wall conductors interact with the armature's propulsion bus current creating forces in the propulsion bus with cavity axis parallel, muzzle directed components; i.e. apparent forces of repulsion from the aft wall conductors are created in the propulsion bus.

[0135] The current's path in aft current shunt 37 is from said shunt's surface 38 to surface 39; i.e. from `i` to `j` in the figure. Aft shunt's surface 39 has continuous electrical continuity with cavity surface 23 of the additional barrel rail, barrel rail 24, use in the propulsion bus-aft shunt circuit means in the topic design and the current's path continues in barrel rail 24 to its cavity surface's continuous continuity with surface 40 of the propulsion bus 41; i.e. from `j` to `k` in the figure.

[0136] Surface 39 of aft current shunt 37, `j` in the figure, and surface 40 of propulsion bus 41, `k` in the figure, are the aft current shunt's additional surface and the propulsion bus's additional surface, respectively, which, along with barrel rail 24, comprise the propulsion bus-aft shunt circuit means in the topic design.

[0137] The current's path continues in the armature's propulsion bus from its surface 40, `k` in the figure, passing under propulsion bus insulator 98, which protects the propulsion bus from continuity with the contact means of wall conductors passing across it, to `l`, then circumscribes most of the body of the armature and exits the propulsion bus at said bus's surface 42, `m` in the figure. The current's direction, LFMTB, about the body of the armature in propulsion bus 41 is always the same as the currents' direction in the forward wall conductors and opposite the currents' direction in the aft wall conductors. As noted above, the magnetic fields of the currents in the forward and aft wall conductors interact with the propulsion bus current creating forces in the propulsion bus. Said propulsion bus forces propel the armature in the barrel cavity towards and out of the barrel cavity's muzzle opening. The current's path continues from propulsion bus surface 42, `m` in the figure, to cavity surface 26 of power rail 27 with which it has continuous electrical continuity. The current's path in power rail 27 has breech direction to said rail's connection means 28 and therefrom to the return terminal of the outside power supply. The current's path is from `m` to `n` to `o` in the figure.

[0138] With the polarities of the power rails reversed, the current's path in power rail 27 is from connection means 28 to said rail's continuity with surface 42 of the armature's propulsion bus 41; i.e. from `o` to `n` to `m` in the figure. The current's path continues in propulsion bus 41 in a counter clockwise direction, LFMTB, to the propulsion bus's surface 40 and therefrom to barrel rail 24 of the propulsion bus-aft shunt circuit means; i.e. from `m` to `l` to `k` in the figure. The current's path continues with breech direction in barrel rail 24 to the continuity of its surface 23 with surface 39 of the aft current shunt 37; i.e. from `k` to `j` in the figure.

[0139] The current's path continues in aft current shunt 37 from said shunt's surface 39 to surface 38 whereat it continues in the aft wall conductors, via said conductors contact means 19, in a clockwise direction to the barrel bus 17 of the wall conductor assembly 16; i.e. from `j` to `i` to `h` to `g` in the figure. The magnetic fields of the currents in the aft wall conductors interact with the propulsion bus current creating therein forces with cavity axis parallel, muzzle directed components; i.e. apparent forces of repulsion to the aft wall conductors are created in the propulsion bus.

[0140] The currents path continues in the wall conductor assembly's barrel bus in the muzzle direction to the forward wall conductors wherein said path has a counter clockwise direction about the barrel cavity and armature therein to electrical continuity of the contact means 19 of said wall conductors with surface 35 of forward wall conductor 34; i.e. from `g` to `f` to `e` to `d` in the figure. The magnetic fields of the currents in the forward wall conductors interact with the propulsion bus current creating in the propulsion bus forces with cavity axis parallel, muzzle directed components; i.e. apparent forces of attraction to the forward wall conductors are created in the propulsion bus.

[0141] The current's path continues through forward current shunt 34 from surface 35, under insulator 9, to surface 36. The current's path continues from forward current shunt's surface 36 through barrel rail 30 to said rails connection means 31 to the outside power rail; i.e. from `d` to `c` to `b` to `a` in the figure.

[0142] As indicated above, regardless the instant polarity of the power rails, the forces created in the propulsion bus of an armature in the barrel cavity due to the interaction with said bus's current of the magnetic fields of the currents in the forward and aft wall conductors propel the armature in the barrel's cavity towards the muzzle.

[0143] FIG. 8 is a breech end section of the barrel rail subassembly 25 with its various features indicated. Guides 5a, 6a, 7a, and 8a of the rail subassembly are in guide ways 5, 6, 7 and 8, respectively, of an armature in the barrel cavity and travel therein while the armature traverses said cavity to maintain the proper orientation of the armature. Guides 5, 6, 7 and 8 also maintain electrical isolation between of the power rails 27 and 30 and barrel rail 24 of the propulsion bus-aft shunt circuit means. Barrel cavity surface 23 of barrel rail 24 with an armature in the barrel cavity maintains continuous electrical continuity with propulsion bus surface 40 and aft current shunt surface 39 of said armature. Aft current shunt surface 39 and propulsion bus surface 40 along with barrel rail 24 and its cavity surface 23 comprise the propulsion bus-aft shunt circuit means of the design. Indicated also are cavity surface 29 of power rail 30 and cavity surface 26 of power rail 27. With an armature in the barrel cavity, cavity surface 29 of power rail 30 maintains continuous electrical continuity with surface 36 of said armature's forward current shunt 34 and cavity surface 26 of power rail 27 maintains continuous electrical continuity with surface 42 of said armature's propulsion bus.

[0144] FIG. 9 portrays an armature which contains a current bus as the propulsion bus-aft shunt circuit means for use with the barrel in FIG. 1 that has its barrel rail subassembly 25 replaced with barrel rail subassembly 125. A breech end section of subassembly 125 is indicated in FIG. 11. Aft current shunt 137 has only surface 138 and propulsion bus 141 has only surface 142 and there is no barrel rail 24 in this design. Current bus 140 in the armature extending between and connecting the aft current shunt 137 and the propulsion bus 141 replaces these features of the propulsion bus-aft shunt circuit means used in the preceding design.

[0145] In the topic armature there are only 3 guide ways, 105, 106 and 107 and the forward current shunt requires no insulator element. Insulator 199 protects the aft current shunt and the armature's current bus from electrical continuity with power rail 130. Surface 129 of power rail 130 is between guide ways 106 and 107 of an armature in the barrel cavity and has thereat continuous electrical continuity with forward current shunt surface 136 and surface 126 of power rail 127 is between guide ways 105 and 106 of an armature in the barrel's cavity and has thereat continuous electrical continuity with surface 142 of propulsion bus 141.

[0146] FIG. 10 is a oblique view of the topic armature disassembled. Indicated are forward current shunt 134 which mounts in open channel 150 and therein supplants and continues the armature's surface and guide way 107. Current bus 140 of the propulsion bus-aft shunt circuit means extends between and connects aft current shunt 137 and propulsion bus 141 at its end distal its end with power rail continuity. In the assembled armature, aft current shunt 137 mounts in open channel 152 and therein supplants and continues the armature's surface and the propulsion bus 141 mounts in open channel 154 and therein supplants and continues the armature's surface and current bus 140 mounts in channel 153 which communicates with both channels 152 and 154. In the assembled armature insulator 199 covers part of channel 152 and part of channel 154 and all of channel 153 and current bus 140 therein and supplants and continues the armature's surface and the guide ways 106 and 107 thereat. Propulsion bus insulator 198 of an armature in the barrel's cavity, which protects said bus from continuity with the contact means of wall conductors at or crossing over said bus, mounts on said bus in channel 154 and therein supplants and continues the armature's surface thereat.

[0147] FIG. 11 is an oblique view of a breech end section of the barrel rail subassembly 125 replacing barrel rail subassembly 25 in the barrel in FIG. 1 to adapt it for use in propelling armatures of the design in FIGS. 9 and 10. With an armature in the barrel's cavity, guides 105a, 106a, and 107a are in and travel in armature guide ways 105,106 and 107, respectively, maintaining proper armature orientation and electrical isolation between power rail 127 and 130 mounted in said assembly.

[0148] It should be noted that armatures with a current bus for the propulsion bus-aft shunt circuit means can be designed for used in the barrel in FIG. 1 with barrel rail subassembly 25, making the barrel with said barrel rail subassembly suitable to both armatures with and without a current bus for the propulsion bus-aft shunt circuit mean. When the barrel is used with an armature with a current bus, the barrel rail 24 has a passive roll as a spacer.

[0149] Although the invention has been described herein with reference to the presently preferred embodiments, a great number of modifications, changes and alterations, including alternative configurations of said embodiments, are possible without departing from the spirit and scope of the invention as defined in the appended claims and equivalents thereof.

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