US3714728A - Compressible primer contact and fixed firing pin assembly - Google Patents

Compressible primer contact and fixed firing pin assembly Download PDF

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US3714728A
US3714728A US00100742A US3714728DA US3714728A US 3714728 A US3714728 A US 3714728A US 00100742 A US00100742 A US 00100742A US 3714728D A US3714728D A US 3714728DA US 3714728 A US3714728 A US 3714728A
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primer
bolt assembly
firing pin
assembly
propellant
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US00100742A
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W Perkins
A Schlack
T Ciccone
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US Department of Army
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US Department of Army
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F42—AMMUNITION; BLASTING
    • F42C—AMMUNITION FUZES; ARMING OR SAFETY MEANS THEREFOR
    • F42C19/00—Details of fuzes
    • F42C19/08—Primers; Detonators
    • F42C19/085—Primers for caseless ammunition
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F42—AMMUNITION; BLASTING
    • F42B—EXPLOSIVE CHARGES, e.g. FOR BLASTING, FIREWORKS, AMMUNITION
    • F42B5/00—Cartridge ammunition, e.g. separately-loaded propellant charges
    • F42B5/02—Cartridges, i.e. cases with charge and missile
    • F42B5/08—Cartridges, i.e. cases with charge and missile modified for electric ignition
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F42—AMMUNITION; BLASTING
    • F42B—EXPLOSIVE CHARGES, e.g. FOR BLASTING, FIREWORKS, AMMUNITION
    • F42B5/00—Cartridge ammunition, e.g. separately-loaded propellant charges
    • F42B5/02—Cartridges, i.e. cases with charge and missile
    • F42B5/18—Caseless ammunition; Cartridges having combustible cases
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S102/00—Ammunition and explosives
    • Y10S102/70—Combustilbe cartridge

Definitions

  • the primer contact is operationally interposed between a priming mixture and a firing pin or center electrode which is an integral part of a small arms weapon bolt assembly and is affixed thereto.
  • Undesirable propellant gas leakage is obviated in the firing pin area by the fixed firing pin bolt assembly which acts as an obturator during the ballistic cycle.
  • the primer contact plug is located slightly below flush with respect to the rear surface of the caseless cartridge and from that position, tolerates longitudinal compression to assure good electrical conduction to the sensitive priming mixture while compensating for variations in the seating depth of the primer assembly.
  • This invention relates to an electrical primer for actuation of caseless ammunition and more particularly to a primer contact plug that allows electrical ignition of a priming mixture while effectively prohibiting the undesirable leakage of propellant gases.
  • Electric primers usually consist of two electrodes a center contact as a positive pole and an outer contact cup as a negative pole or ground separated by an insulator with a bridge wire, graphite bridge or conductive mix to provide a conductive path between the positive and negative poles. In communication with this conductive path and between the two poles is charged a heat or voltage sensitive priming mix which is ignited when electrical energy is applied.
  • the primer was inserted below flush to prevent ignition by an accidental voltage application. Because of the tolerance allowed for the seating depth of the primer, coupled with the tolerances of an operational weapon, the firing pin (center electrode) must have been extendable from the bolt face and must have had the degree of freedom to overcome the combined aforementioned tolerances to thereby assure good electrical contact between the center electrode and the primer contact.
  • fixed firing pins have been successfully utilized with caseless ammunition due to the tolerances of the seating depth of the primer.
  • the use of fixed firing pins is desirable. It is also desirable to prevent this gas leakage to assure a durable and more reliable weapon, and to assure more consistent projectile ballistics.
  • the primer contact is constructed of an electrically conductive compressible material. This compressible primer contact is seated only as far below flush as will allow tolerable compression thereof while still assuring good electrical contact.
  • the primer contact in one embodiment, may be constructed of a solid core of rubberized propellant having means for electrical conduction between the caseless ammunition allows the weapon firing pin I (center electrode) to be fixed in a position slightly two conductive end layers of the core.
  • the primer contact may be constructed from a hollow cylinder of consumable material having bellows or accordian-like sidewalls and rigid conductive end layers or rigid sidewalls and at least one flexible conductive end layer both of these constructions also having means for electrical conduction between the two conductive end layers.
  • a round is pushed forward by the bolt assembly until the cartridge is firmly lodged in the chamber.
  • the foremost part of the bolt assembly, the firing pin compresses the primer contact (positive poles) until the bolt face contacts the outer annular position (negative pole) of the primer.
  • the trigger circuit is closed, electrical current flows through the center electrode to the primer contact, through the heat sensitive and conductive priming mixture to the propellant container, then back to the bolt (ground electrode).
  • the bolt with the integral or fixed firing pin acts as an obturator preventing the rearward leakage of the propellant gases in the primer area, thus contributing to the consistent ballistics of the weapon system.
  • FIG. I there is shown a gun chamber 21 which houses a bolt assembly 22, for electrical actua-' tion of a small caliber caseless cartridge '10 having a main propellant charge 11.
  • An electrical primer assembly 23 is seated in the base of the cartridge 10 and consists of an outer conductor cup 12, a voltage sensitive priming mixture 14 packed into the bottom of the cup 12 and an annular shaped electrical insulator 15 in communication with the internal sidewalls of the cup 12 and extending only as far as the lip thereof and dimensioned to receive a firing pin therewithin.
  • Outer cup edge 13 must extend slightly rearward of the cartridge base 10A to assure satisfactory electrical ground contact.
  • a plug of conductive rubberized propellant primer contact 16 such as a graphite added or lead dioxide added to rubberized propellant fills the remainder of the cup 12 and communicates with the annular insulator 1S and the priming mixture 14. As shown, the primer contact 16 is in a semi-compressed state, the compressive force being applied by the bolt assembly 22.
  • Bolt assembly 22 incorporates a firing pin 19 which functions as a positively poled electrode and which is insulated by an insulator seal 18 from a negative electrode 17 which is configured to communicate with the interval sidewalls of the gun chamber 21.
  • the firing pin 19 is fixed to the bolt assembly 22 and is encased thereby except for a portion which protrudes from the bolt face 20 and operationally bears upon the primer contact 16.
  • the primer contact plug described heretofore is illustrative only, many variations being realizable in light of the invention. Such variations are shown in FIG. 2A 2E inclusive, where there is shown modifications of the primer contact plug illustrated in FIG. 1.
  • a core of nonconductive rubberized propellant 25 having conductive end layers 26 and means for electrical conduction between the end layers such as a combustible metal wire 27 of FIG. 2A, a bridge of combustible conductive material 28 such as lead dioxide or zirconium of FIG. 2B or conductive outer layer 29 of FIG. 2C.
  • FIG. 2D Another modification of the primer contact plug as illustrated in FIG. 1 is shown in FIG. 2D.
  • hollow cylinder 30 with bellows-like sidewalls which in compression collapse much like the bellows of an accordian
  • rigid conductive end layers 34 at right angles thereto and the aforementioned combustible metal wire 27 for electrical conduction between the rigid end layers.
  • FIG. 2B A further modification of the invention illustrated in FIG. 1 is shown in FIG. 2B wherein a cup-shaped rigid consumable material 31 is encased within a like cupshaped outer conductive layer 32 to form a plug which is capped by a flexible conductive lid 33; upon compression, only lid 33 is deformed, the cup-shaped members remaining rigid.
  • firing pin 19 compresses the primer contact 16 (or any of the primer contacts shown in FIGS. 2A 2E, inclusive) until ground electrode face contacts the outer edge 13 of primer conductor Propellant gases are prevented from leaking rearward in the firing pin area by the fixed firing pin-bolt assembly 22. There being no gas leakage in the primer area, the output of the primer is fully utilized to ignite the propellant and thus provide more consistent ballistics.
  • the improvement comprising an electrically conductive compressible primer contact assembly operationally interposed between said bolt assembly and said priming mixture for compression by said bolt assembly until said bolt assembly abuts said cartridge to thereby prevent, upon the initiation of the ballistic cycle, the flow of propellant gases rearward in the firing pin area of said bolt assembly, said primer contact including a plug of rubberized propellant and a lead dioxide bridge extending therethrough.
  • the improvement comprising an electrically conductive compressible primer contact assembly operationally interposed between said bolt assembly and said priming mixture for compression by said bolt assembly until said bolt assembly abuts said cartridge to thereby prevent, upon the initiation of the ballistic cycle, the flow of propellant gases rearward in the firing pin area of said bolt assembly, said primer contact assembly including a substantially cylindrical plug of primer contact material, a pair of electrically conductive layers positioned one each at the respective ends of said plug and substantially perpendicular to a central axis thereon, and electrically conductive means operatively connected to said layers and substantially parallel to said central axis for carrying applied current to one of said layers, said plug being a core of rubberized propellant.

Abstract

A compressible primer contact plug and fixed firing pin assembly combination for use in small caliber electrically actuated caseless ammunition and small arms weapons. The primer contact is operationally interposed between a priming mixture and a firing pin or center electrode which is an integral part of a small arms weapon bolt assembly and is affixed thereto. Undesirable propellant gas leakage is obviated in the firing pin area by the fixed firing pin bolt assembly which acts as an obturator during the ballistic cycle. The primer contact plug is located slightly below flush with respect to the rear surface of the caseless cartridge and from that position, tolerates longitudinal compression to assure good electrical conduction to the sensitive priming mixture while compensating for variations in the seating depth of the primer assembly.

Description

United States Patent Perkins et al.
in] 3,714,728 [45] 'Feb. 6,- 1973 1 COMPRESSIBLE PRIMER CONTACT AND FIXED FIRING PIN ASSEMBLY [75] Inventors: William E. Perkins, 'Runnemede, N.J.; Allen F. Schlack, Churchville; Thomas Q. Ciccone, Langhome, both of Pa.
[73] Assignee: The United'States of America as represented by the Secretary of the Army [22] Filed: Dec. 22, 1970 21 Appl. No.: 100,742
[52] U.S. Cl ..42/84, 102/46, l02/DlG. 1 [51] Int. Cl ..F4lb 5/18 [58] Field of Search ...42/84; 89/26, 28, 135; 102/46, lO2/D1G. l
[56] References Cited UNlTED STATES PATENTS 365,842 7/1887 Monfort ..102/46 1,485,404 3/1924 Martin et a1 ..102/46 3,613,282 10/1971 Ramsay ..42/84 3,577,922 5/1971 Zehfeld et a1. ..102/46 712,826 11/1902 Mason ..102/46 Primary Examiner-Stephen C. Bentley Attorney-Edward .1. Kelly, Harry M. Saracovitz, Herbert Her] and Sheldon Kanars [57] ABSTRACT A compressible primer contact plug and fixed firing pin assembly combination for use in small caliber electrically actuated caseless ammunition and small arms weapons. The primer contact is operationally interposed between a priming mixture and a firing pin or center electrode which is an integral part of a small arms weapon bolt assembly and is affixed thereto. Undesirable propellant gas leakage is obviated in the firing pin area by the fixed firing pin bolt assembly which acts as an obturator during the ballistic cycle. The primer contact plug is located slightly below flush with respect to the rear surface of the caseless cartridge and from that position, tolerates longitudinal compression to assure good electrical conduction to the sensitive priming mixture while compensating for variations in the seating depth of the primer assembly.
6 Claims, 6 Drawing Figures Mitchell ..102/46 PATENTEDFEH 6 I975 3,714,728
FgZA F2 25 F2926 F2 20 1 2 .25
INVENTORSI ALLEN F. SCHLACK WILLIAM E. PERKlNS THOMAS Q.C.\CC.ONE
DY "23,1? M HMWATTJLZZNEY5 COM PRESSIBLE PRIMER CONTACT AND FIXED FIRING PIN ASSEMBLY The invention described herein may be manufactured, used, and licensed by or for the Government for governmental purposes without the payment to us of any royalty thereon.
BACKGROUND OF THE INVENTION This invention relates to an electrical primer for actuation of caseless ammunition and more particularly to a primer contact plug that allows electrical ignition of a priming mixture while effectively prohibiting the undesirable leakage of propellant gases.
Generally there are two approaches that can be taken to actuate combustible ammunition; mechanically, using percussion primers or electrically, using electric primers. Design and performance problems have been encountered in both approaches but only the latter is to be here considered.
Electric primers usually consist of two electrodes a center contact as a positive pole and an outer contact cup as a negative pole or ground separated by an insulator with a bridge wire, graphite bridge or conductive mix to provide a conductive path between the positive and negative poles. In communication with this conductive path and between the two poles is charged a heat or voltage sensitive priming mix which is ignited when electrical energy is applied.
I-Ieretofore with regard to electrically primed ammunition, the primer was inserted below flush to prevent ignition by an accidental voltage application. Because of the tolerance allowed for the seating depth of the primer, coupled with the tolerances of an operational weapon, the firing pin (center electrode) must have been extendable from the bolt face and must have had the degree of freedom to overcome the combined aforementioned tolerances to thereby assure good electrical contact between the center electrode and the primer contact.
The use of a moveable firing pin in electrically fired weapons using cased ammunition has presented no major problem. With caseless ammunition, however, a moveable firing pin does present a major problem since propellant gases can leak around the moveable firing pin to corrode the electrical insulation between the firing pin and the bolt and also corrode the pin movement assembly. Obturators have been used but with limited success in preventing leakage of the high pressured propellant gases past the firing pin.
Moreover, fixed firing pins have been successfully utilized with caseless ammunition due to the tolerances of the seating depth of the primer. However, the use of fixed firing pins is desirable. It is also desirable to prevent this gas leakage to assure a durable and more reliable weapon, and to assure more consistent projectile ballistics.
It is therefore the general purpose of the present in vention to reliably ignite a priming mixture by application of a voltage while effectively prohibiting the leakage of propellant gases past firing pin fixed with respect to the bolt.
SUMMARY OF THE INVENTION The use of a compressible primer contact plug in protruding from the bolt face, thus preventing the leakage of propellant gases in the firing pin area. The firing pin is electrically insulated from the bolt.
To assure good electrical connection between the firing pin and the primer,,the primer contact is constructed of an electrically conductive compressible material. This compressible primer contact is seated only as far below flush as will allow tolerable compression thereof while still assuring good electrical contact.
The primer contact, in one embodiment, may be constructed of a solid core of rubberized propellant having means for electrical conduction between the caseless ammunition allows the weapon firing pin I (center electrode) to be fixed in a position slightly two conductive end layers of the core. Alternatively, the primer contact may be constructed from a hollow cylinder of consumable material having bellows or accordian-like sidewalls and rigid conductive end layers or rigid sidewalls and at least one flexible conductive end layer both of these constructions also having means for electrical conduction between the two conductive end layers.
In the operation of a typical embodiment of this invention, a round is pushed forward by the bolt assembly until the cartridge is firmly lodged in the chamber. The foremost part of the bolt assembly, the firing pin, compresses the primer contact (positive poles) until the bolt face contacts the outer annular position (negative pole) of the primer. When the trigger circuit is closed, electrical current flows through the center electrode to the primer contact, through the heat sensitive and conductive priming mixture to the propellant container, then back to the bolt (ground electrode).
Current passing through the heat sensitive and conductive priming mixture generates resistive heat which ignites the priming mixture to initiate the ballistic cycle. During this cycle all the components of the primer are combusted so as to leave no harmful residue in the weapon chamber. The bolt with the integral or fixed firing pin acts as an obturator preventing the rearward leakage of the propellant gases in the primer area, thus contributing to the consistent ballistics of the weapon system.
DESCRIPTION OF THE DRAWING DESCRIPTION OF THE PREFERRED EMBODIMENT Referring now to the drawing and more particularly to FIG. I thereof, there is shown a gun chamber 21 which houses a bolt assembly 22, for electrical actua-' tion of a small caliber caseless cartridge '10 having a main propellant charge 11. An electrical primer assembly 23 is seated in the base of the cartridge 10 and consists of an outer conductor cup 12, a voltage sensitive priming mixture 14 packed into the bottom of the cup 12 and an annular shaped electrical insulator 15 in communication with the internal sidewalls of the cup 12 and extending only as far as the lip thereof and dimensioned to receive a firing pin therewithin. Outer cup edge 13 must extend slightly rearward of the cartridge base 10A to assure satisfactory electrical ground contact. A plug of conductive rubberized propellant primer contact 16 such as a graphite added or lead dioxide added to rubberized propellant fills the remainder of the cup 12 and communicates with the annular insulator 1S and the priming mixture 14. As shown, the primer contact 16 is in a semi-compressed state, the compressive force being applied by the bolt assembly 22.
Bolt assembly 22 incorporates a firing pin 19 which functions as a positively poled electrode and which is insulated by an insulator seal 18 from a negative electrode 17 which is configured to communicate with the interval sidewalls of the gun chamber 21. The firing pin 19 is fixed to the bolt assembly 22 and is encased thereby except for a portion which protrudes from the bolt face 20 and operationally bears upon the primer contact 16.
The primer contact plug described heretofore is illustrative only, many variations being realizable in light of the invention. Such variations are shown in FIG. 2A 2E inclusive, where there is shown modifications of the primer contact plug illustrated in FIG. 1. A core of nonconductive rubberized propellant 25 having conductive end layers 26 and means for electrical conduction between the end layers such as a combustible metal wire 27 of FIG. 2A, a bridge of combustible conductive material 28 such as lead dioxide or zirconium of FIG. 2B or conductive outer layer 29 of FIG. 2C. Another modification of the primer contact plug as illustrated in FIG. 1 is shown in FIG. 2D. There is shown hollow cylinder 30 with bellows-like sidewalls (which in compression collapse much like the bellows of an accordian) having rigid conductive end layers 34 at right angles thereto and the aforementioned combustible metal wire 27 for electrical conduction between the rigid end layers.
A further modification of the invention illustrated in FIG. 1 is shown in FIG. 2B wherein a cup-shaped rigid consumable material 31 is encased within a like cupshaped outer conductive layer 32 to form a plug which is capped by a flexible conductive lid 33; upon compression, only lid 33 is deformed, the cup-shaped members remaining rigid.
The operation of the invention will now be explained. When caseless cartridge is firmly lodged in the gun chamber 21 firing pin 19 compresses the primer contact 16 (or any of the primer contacts shown in FIGS. 2A 2E, inclusive) until ground electrode face contacts the outer edge 13 of primer conductor Propellant gases are prevented from leaking rearward in the firing pin area by the fixed firing pin-bolt assembly 22. There being no gas leakage in the primer area, the output of the primer is fully utilized to ignite the propellant and thus provide more consistent ballistics.
It has thus been shown that this invention reliably ignites an electrically sensitive priming mixture while effectively prohibiting the leakage of propellant gases past the firing pin.
We wish it to be understood that we do not desire to be limited to the exact details of construction shown and described, for obvious modifications will occur to a person skilled in the art.
We claim:
1. In combination with a priming mixture within a primer assembly and a fixed firing pin bolt assembly for the actuation of a caseless, small caliber electric cartridge, the improvement comprising an electrically conductive compressible primer contact assembly operationally interposed between said bolt assembly and said priming mixture for compression by said bolt assembly until said bolt assembly abuts said cartridge to thereby prevent, upon the initiation of the ballistic cycle, the flow of propellant gases rearward in the firing pin area of said bolt assembly, said primer contact including a plug of rubberized propellant and a lead dioxide bridge extending therethrough.
2. In combination with a priming mixture within a primer assembly and a fixed firing pin bolt assembly for the actuation of a caseless, small caliber electric cartridge, the improvement comprising an electrically conductive compressible primer contact assembly operationally interposed between said bolt assembly and said priming mixture for compression by said bolt assembly until said bolt assembly abuts said cartridge to thereby prevent, upon the initiation of the ballistic cycle, the flow of propellant gases rearward in the firing pin area of said bolt assembly, said primer contact assembly including a substantially cylindrical plug of primer contact material, a pair of electrically conductive layers positioned one each at the respective ends of said plug and substantially perpendicular to a central axis thereon, and electrically conductive means operatively connected to said layers and substantially parallel to said central axis for carrying applied current to one of said layers, said plug being a core of rubberized propellant.
3. The structure according to claim 2 wherein a lead dioxide bridge extends through said rubberized propellant core.
4. The invention according to claim 2 wherein said conductive means is encased by said core.
5. The invention according to claim 4 wherein said conductive means is a combustible metal wire.
6. The invention according to claim 2 wherein said conductive means is a conductive layer in communication -with the external surface of said core.
I I I! 1.! l

Claims (6)

1. In combination with a priming mixture within a primer assembly and a fixed firing pin bolt assembly for the actuation of a caseless, small caliber electric cartridge, the improvement comprising an electrically conductive compressible primer contact assembly operationally interposed between said bolt assembly and said priming mixture for compression by said bolt assembly until said bolt assembly Abuts said cartridge to thereby prevent, upon the initiation of the ballistic cycle, the flow of propellant gases rearward in the firing pin area of said bolt assembly, said primer contact including a plug of rubberized propellant and a lead dioxide bridge extending therethrough.
1. In combination with a priming mixture within a primer assembly and a fixed firing pin bolt assembly for the actuation of a caseless, small caliber electric cartridge, the improvement comprising an electrically conductive compressible primer contact assembly operationally interposed between said bolt assembly and said priming mixture for compression by said bolt assembly until said bolt assembly Abuts said cartridge to thereby prevent, upon the initiation of the ballistic cycle, the flow of propellant gases rearward in the firing pin area of said bolt assembly, said primer contact including a plug of rubberized propellant and a lead dioxide bridge extending therethrough.
2. In combination with a priming mixture within a primer assembly and a fixed firing pin bolt assembly for the actuation of a caseless, small caliber electric cartridge, the improvement comprising an electrically conductive compressible primer contact assembly operationally interposed between said bolt assembly and said priming mixture for compression by said bolt assembly until said bolt assembly abuts said cartridge to thereby prevent, upon the initiation of the ballistic cycle, the flow of propellant gases rearward in the firing pin area of said bolt assembly, said primer contact assembly including a substantially cylindrical plug of primer contact material, a pair of electrically conductive layers positioned one each at the respective ends of said plug and substantially perpendicular to a central axis thereon, and electrically conductive means operatively connected to said layers and substantially parallel to said central axis for carrying applied current to one of said layers, said plug being a core of rubberized propellant.
3. The structure according to claim 2 wherein a lead dioxide bridge extends through said rubberized propellant core.
4. The invention according to claim 2 wherein said conductive means is encased by said core.
5. The invention according to claim 4 wherein said conductive means is a combustible metal wire.
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Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5235129A (en) * 1991-11-01 1993-08-10 Hughes Aircraft Company High capacity electrical cartridge interconnect
US5608982A (en) * 1994-12-12 1997-03-11 Giat Industries Method and apparatus for an electric arc firing system for caseless ammunition
US6374525B1 (en) * 1999-04-14 2002-04-23 Nils Thomas Firearm having an electrically switched ignition system
US20090205484A1 (en) * 2005-05-03 2009-08-20 Bae Systems Bofors Ab Arrangement for electrical energy transmission in a gun

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US365842A (en) * 1887-07-05 Ments
US712826A (en) * 1902-06-09 1902-11-04 Winchester Repeating Arms Co Combined percussion and electric primer.
US1485404A (en) * 1920-09-03 1924-03-04 M L Ex Ltd Ammunition
US3577922A (en) * 1965-11-17 1971-05-11 Paul Zehfeld Combustible shell base
US3608492A (en) * 1969-10-02 1971-09-28 Gen Electric Ammunition high-voltage electrical ignition system
US3613282A (en) * 1969-09-15 1971-10-19 Olin Corp Electrical ignition shotgun for firing caseless ammunition

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US365842A (en) * 1887-07-05 Ments
US712826A (en) * 1902-06-09 1902-11-04 Winchester Repeating Arms Co Combined percussion and electric primer.
US1485404A (en) * 1920-09-03 1924-03-04 M L Ex Ltd Ammunition
US3577922A (en) * 1965-11-17 1971-05-11 Paul Zehfeld Combustible shell base
US3613282A (en) * 1969-09-15 1971-10-19 Olin Corp Electrical ignition shotgun for firing caseless ammunition
US3608492A (en) * 1969-10-02 1971-09-28 Gen Electric Ammunition high-voltage electrical ignition system

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5235129A (en) * 1991-11-01 1993-08-10 Hughes Aircraft Company High capacity electrical cartridge interconnect
US5329840A (en) * 1991-11-01 1994-07-19 Hughes Missile Systems Company High capacity electrical cartridge interconnect
US5608982A (en) * 1994-12-12 1997-03-11 Giat Industries Method and apparatus for an electric arc firing system for caseless ammunition
US6374525B1 (en) * 1999-04-14 2002-04-23 Nils Thomas Firearm having an electrically switched ignition system
US20090205484A1 (en) * 2005-05-03 2009-08-20 Bae Systems Bofors Ab Arrangement for electrical energy transmission in a gun
US7798051B2 (en) * 2005-05-03 2010-09-21 Bae Systems Bofors Ab Arrangement for electrical energy transmission in a gun

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