US3748770A - Ammunition high voltage electrical ignition system - Google Patents

Ammunition high voltage electrical ignition system Download PDF

Info

Publication number
US3748770A
US3748770A US00131404A US3748770DA US3748770A US 3748770 A US3748770 A US 3748770A US 00131404 A US00131404 A US 00131404A US 3748770D A US3748770D A US 3748770DA US 3748770 A US3748770 A US 3748770A
Authority
US
United States
Prior art keywords
round
conductor
face
aft
conductors
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
US00131404A
Inventor
J Mitchell
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
General Electric Co
Original Assignee
General Electric Co
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by General Electric Co filed Critical General Electric Co
Application granted granted Critical
Publication of US3748770A publication Critical patent/US3748770A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

Classifications

    • 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
    • F41—WEAPONS
    • F41A—FUNCTIONAL FEATURES OR DETAILS COMMON TO BOTH SMALLARMS AND ORDNANCE, e.g. CANNONS; MOUNTINGS FOR SMALLARMS OR ORDNANCE
    • F41A19/00—Firing or trigger mechanisms; Cocking mechanisms
    • F41A19/58—Electric firing mechanisms

Definitions

  • ABSTRACT An electrical ignition system for ammunition that utilizes two fixed electrical contacts in the bolt face; and a primer having an electrically conductive priming mix, and a consumable dielectric disc having two annular consumable conductors therethrough, the gap between the two conductors being significantly greater than twice any gap between the bolt face and the disc, the ignition system being completed and energized by a high voltage power source of sufficient voltage to overcome any air gap between the cartridge and the bolt face.
  • FIG. 2A 33 2a RELATED PATENT This is a division of application Ser. No. 863,076, filed Oct. 2, 1969, now U.S. Pat. No. 3,608,492.
  • This invention relates to the ignition of ammunition, and is especially adapted to combustible caseless ammunition.
  • Prior Art Modern firearms conventionally have utilized a movable firing pin in the bolt to actuate the igniter of the round of ammunition.
  • the case In a firearm utilizing cased ammunition, the case has served to seal the aft end of the chamber to prevent the flow of combustion gas to the face of the bolt.
  • movement of the firing pin relative to the bolt In the case of a percussion actuated igniter, movement of the firing pin relative to the bolt is required to percuss the igniter.
  • movement of the firing pin relative to the bolt is required to insure a good electrical connection between the pin and igniter contact.
  • the firing pin In each case the firing pin is disposed for movement in a passageway, and this passageway must be sealed from the combustion gases. In caseless ammunition, obviously, a case is not available for this function.
  • the advantages of this invention are: (l) the provision of a combustible electric primer for electric ignition in caseless ammunition systems; (2) the elimination of moving parts in the gun bolt, providing a sealed, flush bolt face; (3) the accommodation to a variable gap between the round and the bolt by use of a high voltage current source; and (4) the adaptability to multiple ignition systems with increased reliability of ammunition performance.
  • a feature of this invention is an electrical ignition system utilizing two electrical contacts in the bolt face; and a primer having an electrically conductive priming mix, and a consumable dielectric disc having two annular consumable conductors therethrough, the gap or effective impedance between the two conductors being significantly greater than twice any gap between the bolt face and the disc.
  • FIG. I is a partial view, in side elevation, in crosssection of an ignition system embodlying this invention.
  • FIG. 2A is a view in side elevation in cross-section of the igniter of FIG. 11;
  • FIG. 2B is a view in end elevation of the primer of FIG. 2A.
  • FIG. 3 is a view in side elevation of another embodiment of a primer embodying this invention.
  • FIG. 1 DESCRIPTION OF THE PREFERRED EMBODIMENT
  • the forward end of a bolt 10 is seated against the aft face of the barrel extension 12 to close the chamber 14.
  • a seal 16 may be disposed between the barrel extension and the bolt.
  • a caseless round 18 of ammunition is disposed in the chamber, and the aft end of the round, due to dimensional tolerance, is spaced from the bolt face 20 by a gap 22.
  • the aft end of the round is shown in the chamber and includes a main charge 24 of molded propellant, a booster charge 26 of booster powder disposed in an aft recess in the main charge and captured by a plug 27 of molded propellant, and a primer 28 disposed in an aft recess in the plug.
  • the primer communicates its flame and heat via a bore 29 in the plug in the powder of the booster charge, and to the propellant gains of the main charge and the plug.
  • the bolt 10 includes a central insulator 30 which may be made of a hard ceramic, a central electrode 31 which is disposed along the longitudinal axis of the insulator, and an annular ground electrode 32 which is spaced from the central electrode by the insulator.
  • the two electrodes and the insulator are ground flush with the bolt face.
  • the primer 28 may be composed of any suitable materials that are completely consumable during the interval of the combustion of the round in the chamber and the barrel, a matter of three to ten or more milliseconds. They may be moulded, extruded, or cut from colloided nitrocellulose of any typical propellant composition. Other self oxidizing consumable plastics that on combustion yield largely gaseous products are equally suitable, including composite materials compounded of separate fuel and oxidizers, such as some rocket propellants and some artillery gun propellants.
  • ()ther conductive materials may be used such as acetylene black or other forms of amorphous carbon, powdered copper or silver, although carbon has the advantage of being largely consumed or reduced to carbon dioxide/- monoxide when the nitrocellulose base material burns.
  • the bolt electrodes 31 and 32 are axially aligned with the primer disk electrically conductive portions 42 and 40 and serve as the conductive path for a high voltage current from a power supply, 44, which is coupled through the bolt electrodes, to the electrically conductive primer mix.
  • the radial distance between the primer disk electrically conductive portions 42 and 40, and between the bolt electrodes, is arranged to be sufficiently greater than twice the maximum air gap that may obtain between the bolt face and the primer disk so that arcing from the bolt electrodes to the primer disk electrically conductive portions will occur with high reliability and will result in igniting the primer mix at the selected firing voltage, without any possibility of arcing between the bolt electrodes.
  • the high voltage current source may be a capacitance circuit delivering a pulse of the order of l to 5Kv.
  • the invention can be applied to any type of electrically fired weapon, but is particularly suited to caseless ammunition wherein (l) the ground connection to the gun is not provided by a metallic case, and (2) the ammunition to weapon tolerances are large. Most importantly, the invention permits a complete sealing of the bolt face to provide an unbroken surface which obviates the conventional requirement for pressure seals around the moving parts of a conventional firing pin.
  • the combustible electric primer may be located elsewhere than on the outer aft surface of the round.
  • the firing current may be conducted from the bolt electrodes through short lengths of wire or metallic inserts 50 imbedded in through the combustible propellant bodies. These metallic inserts need not establish conventionally good electrical contacts, insolong as any gaps are small, and an efficient circuit path is provided which will avoid large power losses. Short lengths of aluminum, magnesium or other pyrophoric wire may be used as conductors, and will be consumed in the combustion of the propellant, at most leaving a powdered residue.
  • This advantage permits retention of a closed surface over the aft end of the round during the ignition and burning of the booster charge, thereby aiding this process by added confinement. Further a plurality of primers may be provided which are spaced from each other but electrically connected to the power supply by an efficient independent circuit and thus significantly increase the ignition reliability of the round.
  • a gun comprising:
  • said bolt face having first and second electrical conductors disposed therein, insulated from each other;
  • said round having an aft face having third and fourth electrical conductors disposed therein, insulated from each other,
  • a primer having an electrically conductive priming mixture coupled to and between said third and forth electrical conductors
  • said bolt face and said first and second conductors being spaced from said round aft face and said third and fourth conductors and defining an air gap therebetween;
  • the electrical impedance of the series circuit including said first conductor, said air gap, said third conductor, said electrically conductive primer mixture, said fourth conductor, said air gap, and said second conductor being less than the electrical impedance of the series circuit including said first conductor, said air gap and said second conductor.
  • said second electrical conductor as exposed at said bolt face, is annular in shape and concentric with and about said first electrical conductor.
  • a gun according to claim 2 wherein:
  • said fourth electrical conductor as exposed at said round aft face, is annular in shape and concentric with and about said third electrical conductor.
  • said round of ammunition is consumable and comprises a main charge made of moulded propellant
  • booster charge disposed in said main charge and made of booster powder
  • said primer communicates with said booster charge and includes an outer tubular casing of consumable material, a forward closure of consumable material, an aft closure disk, said electrically conductive priming mixture is disposed within said casing between said forward closure and said aft disk; said disk is made of consumable insulative material and has said third and fourth electrical conductorsmade of consumable material, trans- -versely spaced apart, and extending longitudinally through said disk. 5.
  • a gun wherein: said primer is disposed in said round with the aft face of said disk spaced forwardly from said aft face of said round; and further including fifth and sixth consumable conductors disposed in said round and respectively extending between said third conductor and said round aft face and said fourth conductor and said round aft face.

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Ignition Installations For Internal Combustion Engines (AREA)

Abstract

An electrical ignition system for ammunition that utilizes two fixed electrical contacts in the bolt face; and a primer having an electrically conductive priming mix, and a consumable dielectric disc having two annular consumable conductors therethrough, the gap between the two conductors being significantly greater than twice any gap between the bolt face and the disc, the ignition system being completed and energized by a high voltage power source of sufficient voltage to overcome any air gap between the cartridge and the bolt face.

Description

United States Patent 1 Mitchell [11] 3,743,770 51 July 31, 1973 AMMUNITION HIGH VOLTAGE ELECTRICAL IGNITION SYSTEM [75] Inventor: James W. Mitchell, Philadelphia,
[73] Assignee: General Electric Company,
Burlington, Vt.
221 Filed: Apr. 5, 1971 211 App]. No.: 131,404
Related US. Application Data [62] Division of Ser. No. 863,076, Oct. 2, 1969, Pat. No.
[52] U.S. Cl. 42/84 51] Int. Cl. F41c 19/12 [58] Field of Search 102/38, 46, 464; 42/ 14, 84
[56] References Cited UNITED STATES PATENTS 3,299,812 l/l967 Suh et al 102/46 X 389,448 9/1888 Day 102/46 11/1930 Ross 42/846 10/1960 Lovercheck 42/84 X Primary ExaminerBenjamin A. Borchelt Assistant Examiner-C. T. Jordan Attorney-Bailin L. Kuch et al.
[57] ABSTRACT An electrical ignition system for ammunition that utilizes two fixed electrical contacts in the bolt face; and a primer having an electrically conductive priming mix, and a consumable dielectric disc having two annular consumable conductors therethrough, the gap between the two conductors being significantly greater than twice any gap between the bolt face and the disc, the ignition system being completed and energized by a high voltage power source of sufficient voltage to overcome any air gap between the cartridge and the bolt face.
5 Claims, 4 Drawing Figures FIRING VOLTAGE SOURCE PATENTEBJULB 1 I975 FIG.|
FIRING VOLTAGE SOURCE FIG. 2A 33 2a RELATED PATENT This is a division of application Ser. No. 863,076, filed Oct. 2, 1969, now U.S. Pat. No. 3,608,492.
BACKGROUND OF THE INVENTION 1. Field of Art This invention relates to the ignition of ammunition, and is especially adapted to combustible caseless ammunition.
2. Prior Art Modern firearms conventionally have utilized a movable firing pin in the bolt to actuate the igniter of the round of ammunition. In a firearm utilizing cased ammunition, the case has served to seal the aft end of the chamber to prevent the flow of combustion gas to the face of the bolt. In the case of a percussion actuated igniter, movement of the firing pin relative to the bolt is required to percuss the igniter. Similarly, in the case of an electrically actuated igniter, movement of the firing pin relative to the bolt is required to insure a good electrical connection between the pin and igniter contact. In each case the firing pin is disposed for movement in a passageway, and this passageway must be sealed from the combustion gases. In caseless ammunition, obviously, a case is not available for this function.
In US. Pat. No. 3,114,290, issued Dec. 17, 1963, E. M. Harvey et al proposed a dished cup, similar to a Belleville washer, having a central protuberance, which would seal the aft end of the chamber, around the aft end of the caseless round, and which would be snapped forward by a firing pin, to percuss the igniter. In US. Pat. No. 3,354,780 issued Nov. 28, 1967, M. Ramsey proposed a true Belleville washer to seal the aft end of the chamber to the face of the bolt, and a protuberance integral from the bolt face passing through the center hole of the washer, to percuss the igniter.
SUMMARY OF THE INVENTION It is an object of this invention to provide a system for the ignition of caseless ammunition which obviates moving pins and firing pin seals, and that accommodates dimensional tolerances between the round of ammunition, the chamber and the bolt face of the gun.
The advantages of this invention are: (l) the provision of a combustible electric primer for electric ignition in caseless ammunition systems; (2) the elimination of moving parts in the gun bolt, providing a sealed, flush bolt face; (3) the accommodation to a variable gap between the round and the bolt by use of a high voltage current source; and (4) the adaptability to multiple ignition systems with increased reliability of ammunition performance.
A feature of this invention is an electrical ignition system utilizing two electrical contacts in the bolt face; and a primer having an electrically conductive priming mix, and a consumable dielectric disc having two annular consumable conductors therethrough, the gap or effective impedance between the two conductors being significantly greater than twice any gap between the bolt face and the disc.
BRIEF DESCRIPTION OF THE DRAWING These and other objects, features, and advantages of this invention will be apparent from the following specification thereof taken in conjunction with the accompanying drawing in which:
FIG. I is a partial view, in side elevation, in crosssection of an ignition system embodlying this invention;
FIG. 2A is a view in side elevation in cross-section of the igniter of FIG. 11;
FIG. 2B is a view in end elevation of the primer of FIG. 2A; and
FIG. 3 is a view in side elevation of another embodiment of a primer embodying this invention.
DESCRIPTION OF THE PREFERRED EMBODIMENT In FIG. 1, the forward end of a bolt 10 is seated against the aft face of the barrel extension 12 to close the chamber 14. A seal 16 may be disposed between the barrel extension and the bolt.
A caseless round 18 of ammunition is disposed in the chamber, and the aft end of the round, due to dimensional tolerance, is spaced from the bolt face 20 by a gap 22. The aft end of the round is shown in the chamber and includes a main charge 24 of molded propellant, a booster charge 26 of booster powder disposed in an aft recess in the main charge and captured by a plug 27 of molded propellant, and a primer 28 disposed in an aft recess in the plug. On ignition, the primer communicates its flame and heat via a bore 29 in the plug in the powder of the booster charge, and to the propellant gains of the main charge and the plug.
The bolt 10 includes a central insulator 30 which may be made of a hard ceramic, a central electrode 31 which is disposed along the longitudinal axis of the insulator, and an annular ground electrode 32 which is spaced from the central electrode by the insulator. The two electrodes and the insulator are ground flush with the bolt face.
The primer 28 may be composed of any suitable materials that are completely consumable during the interval of the combustion of the round in the chamber and the barrel, a matter of three to ten or more milliseconds. They may be moulded, extruded, or cut from colloided nitrocellulose of any typical propellant composition. Other self oxidizing consumable plastics that on combustion yield largely gaseous products are equally suitable, including composite materials compounded of separate fuel and oxidizers, such as some rocket propellants and some artillery gun propellants.
The primer 28 includes an outer tubular casing 33, an inner, forward, closure annulus 34, an electrically conductive priming mixture 35, which may be tableted, or if loose, then retained by a thin, forward, consumable disk and an outer aft closure disk 36. The disk 36 is made of consumable insulative material 38 such as nitrocellulose and has an annular, longitudinal portion 40 and a central, longitudinal portion 42 of electrically conductive material. The transverse cross-sections of the electrically conductive portions 40 and 42 are substantially congruent with the bolt face sections of the bolt electrodes 32 and 31 respectively. The conductive portions 40 and 42 may be composed of nitrocellulose mixed with 40 to percent powdered graphite. ()ther conductive materials may be used such as acetylene black or other forms of amorphous carbon, powdered copper or silver, although carbon has the advantage of being largely consumed or reduced to carbon dioxide/- monoxide when the nitrocellulose base material burns.
The bolt electrodes 31 and 32 are axially aligned with the primer disk electrically conductive portions 42 and 40 and serve as the conductive path for a high voltage current from a power supply, 44, which is coupled through the bolt electrodes, to the electrically conductive primer mix. The radial distance between the primer disk electrically conductive portions 42 and 40, and between the bolt electrodes, is arranged to be sufficiently greater than twice the maximum air gap that may obtain between the bolt face and the primer disk so that arcing from the bolt electrodes to the primer disk electrically conductive portions will occur with high reliability and will result in igniting the primer mix at the selected firing voltage, without any possibility of arcing between the bolt electrodes. The high voltage current source may be a capacitance circuit delivering a pulse of the order of l to 5Kv.
It will be appreciated that the invention can be applied to any type of electrically fired weapon, but is particularly suited to caseless ammunition wherein (l) the ground connection to the gun is not provided by a metallic case, and (2) the ammunition to weapon tolerances are large. Most importantly, the invention permits a complete sealing of the bolt face to provide an unbroken surface which obviates the conventional requirement for pressure seals around the moving parts of a conventional firing pin.
An additional advantage of the invention is illustrated in FIG. 3. The combustible electric primer may be located elsewhere than on the outer aft surface of the round. The firing current may be conducted from the bolt electrodes through short lengths of wire or metallic inserts 50 imbedded in through the combustible propellant bodies. These metallic inserts need not establish conventionally good electrical contacts, insolong as any gaps are small, and an efficient circuit path is provided which will avoid large power losses. Short lengths of aluminum, magnesium or other pyrophoric wire may be used as conductors, and will be consumed in the combustion of the propellant, at most leaving a powdered residue. This advantage permits retention of a closed surface over the aft end of the round during the ignition and burning of the booster charge, thereby aiding this process by added confinement. Further a plurality of primers may be provided which are spaced from each other but electrically connected to the power supply by an efficient independent circuit and thus significantly increase the ignition reliability of the round.
What is claimed is:
l. A gun comprising:
a barrel having a chamber in the aft end thereof;
a bolt having a face for obturating the aft end of said chamber,
said bolt face having first and second electrical conductors disposed therein, insulated from each other;
a source of high voltage current coupled to and between said conductors;
a round of ammunition disposed in said chamber,
said round having an aft face having third and fourth electrical conductors disposed therein, insulated from each other,
a primer having an electrically conductive priming mixture coupled to and between said third and forth electrical conductors;
said bolt face and said first and second conductors being spaced from said round aft face and said third and fourth conductors and defining an air gap therebetween;
the electrical impedance of the series circuit including said first conductor, said air gap, said third conductor, said electrically conductive primer mixture, said fourth conductor, said air gap, and said second conductor being less than the electrical impedance of the series circuit including said first conductor, said air gap and said second conductor.
2. A gun according to claim 1 wherein:
said second electrical conductor, as exposed at said bolt face, is annular in shape and concentric with and about said first electrical conductor.
3. A gun according to claim 2 wherein:
said fourth electrical conductor, as exposed at said round aft face, is annular in shape and concentric with and about said third electrical conductor.
4. A gun according to claim 1 wherein:
said round of ammunition is consumable and comprises a main charge made of moulded propellant;
a booster charge disposed in said main charge and made of booster powder;
said primer communicates with said booster charge and includes an outer tubular casing of consumable material, a forward closure of consumable material, an aft closure disk, said electrically conductive priming mixture is disposed within said casing between said forward closure and said aft disk; said disk is made of consumable insulative material and has said third and fourth electrical conductorsmade of consumable material, trans- -versely spaced apart, and extending longitudinally through said disk. 5. A gun according to claim 4 wherein: said primer is disposed in said round with the aft face of said disk spaced forwardly from said aft face of said round; and further including fifth and sixth consumable conductors disposed in said round and respectively extending between said third conductor and said round aft face and said fourth conductor and said round aft face.
4 4' i t l

Claims (5)

1. A gun comprising: a barrel having a chamber in the aft end thereof; a bolt having a face for obturating the aft end of said chamber, said bolt face having first and second electrical conductors disposed therein, insulated from each other; a source of high voltage current coupled to and between said conductors; a round of ammunition disposed in said chamber, said round having an aft face having third and fourth electrical conductors disposed therein, insulated from each other, a primer having an electrically conductive priming mixture coupled to and between said third and forth electrical conductors; said bolt face and said first and second conductors being spaced from said round aft face and said third and fourth conductors and defining an air gap therebetween; the electrical impedance of the series circuit including said first conductor, said air gap, said third conductor, said electrically conductive primer mixture, said fourth conductor, said air gap, and said second conductor being less than the electrical impedance of the series circuit including said first conductor, said air gap and said second conductor.
2. A gun according to claim 1 wherein: said second electrical conductor, as exposed at said bolt face, is annular in shape and concentric with and about said first electrical conductor.
3. A gun according to claim 2 wherein: said fourth electrical conductor, as exposed at said round aft face, is annular in shape and concentric with and about said third electrical conductor.
4. A gun according to claim 1 wherein: said round of ammunition is consumable and comprises a main charge made of moulded propellant; a booster charge disposed in said main charge and made of booster powder; said primer communicates with said booster charge and includes an outer tubular casing of consumable maTerial, a forward closure of consumable material, an aft closure disk, said electrically conductive priming mixture is disposed within said casing between said forward closure and said aft disk; said disk is made of consumable insulative material and has said third and fourth electrical conductors made of consumable material, transversely spaced apart, and extending longitudinally through said disk.
5. A gun according to claim 4 wherein: said primer is disposed in said round with the aft face of said disk spaced forwardly from said aft face of said round; and further including fifth and sixth consumable conductors disposed in said round and respectively extending between said third conductor and said round aft face and said fourth conductor and said round aft face.
US00131404A 1969-10-02 1971-04-05 Ammunition high voltage electrical ignition system Expired - Lifetime US3748770A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US86307669A 1969-10-02 1969-10-02
US13140471A 1971-04-05 1971-04-05

Publications (1)

Publication Number Publication Date
US3748770A true US3748770A (en) 1973-07-31

Family

ID=26829433

Family Applications (1)

Application Number Title Priority Date Filing Date
US00131404A Expired - Lifetime US3748770A (en) 1969-10-02 1971-04-05 Ammunition high voltage electrical ignition system

Country Status (1)

Country Link
US (1) US3748770A (en)

Cited By (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5233902A (en) * 1992-05-11 1993-08-10 The United States Of America As Represented By The Secretary Of The Navy Sliding breech block system for repetitive electronic ignition
US5235129A (en) * 1991-11-01 1993-08-10 Hughes Aircraft Company High capacity electrical cartridge interconnect
US5303495A (en) * 1992-12-09 1994-04-19 Harthcock Jerry D Personal weapon system
US5608982A (en) * 1994-12-12 1997-03-11 Giat Industries Method and apparatus for an electric arc firing system for caseless ammunition
WO1998002706A1 (en) * 1996-07-15 1998-01-22 Ronkainen James W Electrically insulated firing pin
US6374525B1 (en) * 1999-04-14 2002-04-23 Nils Thomas Firearm having an electrically switched ignition system
FR2848896A1 (en) * 2002-12-19 2004-06-25 Hilti Ag Threading device for cartridge film in tool to seal fixation units, has pin electrode placed in insulator where one point is in relation with channel, and annual electrode to hold channel near support holding insulator
US20050188872A1 (en) * 2004-02-25 2005-09-01 Oertwig Terrance D. Electronic ignition system for personal black powder firearms
US20070137470A1 (en) * 2004-02-25 2007-06-21 Oertwig Terrance D Sequential discharge electronic ignition system for blackpowder firearms
US20090205484A1 (en) * 2005-05-03 2009-08-20 Bae Systems Bofors Ab Arrangement for electrical energy transmission in a gun
US20100170930A1 (en) * 2006-08-22 2010-07-08 Max Co Ltd Gas combustion type driving tool
US20140162195A1 (en) * 2012-10-23 2014-06-12 Clearsign Combustion Corporation System for safe power loss for an electrodynamic burner
US10234248B1 (en) * 2017-06-12 2019-03-19 The United States Of America As Represented By The Secretary Of The Navy Micro-electric-pyrotechnic energy-harvesting apparatus for munitions
US10309743B2 (en) 2017-05-15 2019-06-04 Shyam Swaminadhan Rami Triggering mechanism for hybrid primer cartridges
WO2020072609A1 (en) * 2018-10-05 2020-04-09 Axon Enterprise, Inc. Systems and methods for ignition in a conducted electrical weapon

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US389448A (en) * 1888-09-11 Electric primer
US1782148A (en) * 1927-10-26 1930-11-18 Oscar A Ross Synchronized machine gun
US2957391A (en) * 1955-04-18 1960-10-25 Charles L Lovercheck Firing mechanism for firearms and the like
US3299812A (en) * 1965-01-29 1967-01-24 United Shoe Machinery Corp Electric ignition cartridges

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US389448A (en) * 1888-09-11 Electric primer
US1782148A (en) * 1927-10-26 1930-11-18 Oscar A Ross Synchronized machine gun
US2957391A (en) * 1955-04-18 1960-10-25 Charles L Lovercheck Firing mechanism for firearms and the like
US3299812A (en) * 1965-01-29 1967-01-24 United Shoe Machinery Corp Electric ignition cartridges

Cited By (26)

* 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
US5233902A (en) * 1992-05-11 1993-08-10 The United States Of America As Represented By The Secretary Of The Navy Sliding breech block system for repetitive electronic ignition
US5303495A (en) * 1992-12-09 1994-04-19 Harthcock Jerry D Personal weapon system
US5608982A (en) * 1994-12-12 1997-03-11 Giat Industries Method and apparatus for an electric arc firing system for caseless ammunition
WO1998002706A1 (en) * 1996-07-15 1998-01-22 Ronkainen James W Electrically insulated firing pin
US6374525B1 (en) * 1999-04-14 2002-04-23 Nils Thomas Firearm having an electrically switched ignition system
US7014086B2 (en) * 2002-12-19 2006-03-21 Hilti Aktiengesellschaft Ignition device for igniting a foil cartridge in an explosion-operated power tool
FR2848896A1 (en) * 2002-12-19 2004-06-25 Hilti Ag Threading device for cartridge film in tool to seal fixation units, has pin electrode placed in insulator where one point is in relation with channel, and annual electrode to hold channel near support holding insulator
US20040182906A1 (en) * 2002-12-19 2004-09-23 Tilo Dittrich Ignition device for igniting a foil cartridge in an explosion-operated power tool
US20070107591A1 (en) * 2004-02-25 2007-05-17 Oertwig Terrance D Electronic Ignition system for a Firearm
US20050188872A1 (en) * 2004-02-25 2005-09-01 Oertwig Terrance D. Electronic ignition system for personal black powder firearms
US20070137470A1 (en) * 2004-02-25 2007-06-21 Oertwig Terrance D Sequential discharge electronic ignition system for blackpowder firearms
US7197843B2 (en) * 2004-02-25 2007-04-03 Opg Gun Ventures, Llc Electronic ignition system for a firearm
US7798051B2 (en) * 2005-05-03 2010-09-21 Bae Systems Bofors Ab Arrangement for electrical energy transmission in a gun
US20090205484A1 (en) * 2005-05-03 2009-08-20 Bae Systems Bofors Ab Arrangement for electrical energy transmission in a gun
US8006879B2 (en) * 2006-08-22 2011-08-30 Max Co., Ltd. Gas combustion type driving tool
US20100170930A1 (en) * 2006-08-22 2010-07-08 Max Co Ltd Gas combustion type driving tool
US20140162195A1 (en) * 2012-10-23 2014-06-12 Clearsign Combustion Corporation System for safe power loss for an electrodynamic burner
US10309743B2 (en) 2017-05-15 2019-06-04 Shyam Swaminadhan Rami Triggering mechanism for hybrid primer cartridges
US10234248B1 (en) * 2017-06-12 2019-03-19 The United States Of America As Represented By The Secretary Of The Navy Micro-electric-pyrotechnic energy-harvesting apparatus for munitions
WO2020072609A1 (en) * 2018-10-05 2020-04-09 Axon Enterprise, Inc. Systems and methods for ignition in a conducted electrical weapon
US10782113B2 (en) 2018-10-05 2020-09-22 Axon Enterprise, Inc. Systems and methods for ignition in a conducted electrical weapon
US20200400416A1 (en) * 2018-10-05 2020-12-24 Axon Enterprise, Inc. Ignition device for a conducted electrical weapon
KR20210052594A (en) * 2018-10-05 2021-05-10 액손 엔터프라이즈 인코포레이티드 Systems and methods for ignition in conduction-type electric weapons
US11781847B2 (en) * 2018-10-05 2023-10-10 Axon Enterprise, Inc. Ignition device for a conducted electrical weapon

Similar Documents

Publication Publication Date Title
US3748770A (en) Ammunition high voltage electrical ignition system
US2926566A (en) Device for accelerating the ignition of the propellant for a projectile
US4493297A (en) Plasma jet ignition device
CA1125091A (en) Propellant charge igniter
CA1210276A (en) Ammunition for steep-angle fire
US6796243B2 (en) Cartridge
US7574960B1 (en) Ignition element
US3563177A (en) Caseless ammunition and ignition means therefor
US3299812A (en) Electric ignition cartridges
US319628A (en) samuel eussell
US6332403B1 (en) Ammunition cartridge with electrically ignited propellant charge
US3608492A (en) Ammunition high-voltage electrical ignition system
US667435A (en) Cartridge fired by electricity.
US3090310A (en) Conductive explosive primer mixture and device
EP1148314B1 (en) Ammunition cartridge
US2708877A (en) Low tension igniter for explosives
US4881463A (en) Electric igniter assembly
US3779167A (en) Electrical initiator
GB2343500A (en) Propulsive charge for ammunition
US3726222A (en) Ignition system for caseless ammunition
US5608982A (en) Method and apparatus for an electric arc firing system for caseless ammunition
US2464181A (en) Rocket device
US4170922A (en) Ignitor
US4771692A (en) Electric igniter assembly
US3089418A (en) Gas generator for guided missiles