EP0717256B1 - Système de mise à feu par arc électrique d'une munition sans douille - Google Patents
Système de mise à feu par arc électrique d'une munition sans douille Download PDFInfo
- Publication number
- EP0717256B1 EP0717256B1 EP95402531A EP95402531A EP0717256B1 EP 0717256 B1 EP0717256 B1 EP 0717256B1 EP 95402531 A EP95402531 A EP 95402531A EP 95402531 A EP95402531 A EP 95402531A EP 0717256 B1 EP0717256 B1 EP 0717256B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- anode
- insulating body
- firing system
- munition
- ring
- 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
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Classifications
-
- 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
- F41A19/63—Electric firing mechanisms having means for contactless transmission of electric energy, e.g. by induction, by sparking gap
Definitions
- the technical field of the present invention is that of ammunition firing systems without small caliber cartridge case, especially for weapons portable fire.
- US3859746 and US5074189 describe ammunition firing systems without arch holster electric.
- US3859746 does not specify which sealing and insulation must be provided at the level of the chamber of the weapon and US5074189 (which forms the basis of the preamble to claim main room) offers a fully closed room the rear of the weapon, gas tightness being ensured by the cooperation of the tube of the sliding weapon by compared to a front part of the room.
- Patent GB2234335 describes a device for updating ammunition fire not by electric arc but by magnetic or electric induction.
- the object of the invention is to design a system of firing which can in particular solve this problem sealing to allow the firing of ammunition without shell with portable type weapons, and of which the architecture and the constituent materials can also meet the requirements for thermo-mechanical behavior at instantaneous gas temperatures of combustion of the order of 2500 ° C.
- the invention proposes a system for updating fire from ammunition without a shell, especially small caliber for a portable firearm, by discharge of an electric arc which is produced in the vicinity of initiating ammunition from high voltage applied between two electrodes, the electrode forming the anode being mounted on a support fixed to the rear of the room, this support ensuring in particular the insulation the anode, and the electrode forming the cathode being constituted by the metallic chamber of tear.
- This system is characterized in that the support of the anode also ensures gas tightness of combustion and includes a cylindrical body electrically insulating which surrounds the anode, a ring made of an elastically deformable material mounted around insulating body, and an annular plug attached around the ring.
- the electrode forming the anode, the insulating body, the ring intermediate and the plug are assembled by brazing.
- the electrode forming the anode is a cylindrical rod pointed tip molybdenum mounted in the center of the body insulator so as to be axially aligned with the ammunition and next to the primer, a metallic glitter is applied to the primer of the ammunition, and the surface of the insulating body in contact with the ammunition is substantially equal to that of the base of the ammunition.
- a very first advantage of the invention lies in a system that has sufficient properties to be able to be used reliably and safely security, in particular without inadvertent risk of thermo-initiation.
- Another advantage of the firing system according to the invention resides in its compactness.
- the firing system 1 shown in Figure 1 is intended to initiate ammunition 2 without socket, whose propellant charge 3 is ignited by a primer 4.
- the ammunition is positioned so classic in a 5a chamber for loading and firing the breech 5 partially shown of a firearm.
- this firing system 1 is based on the principle of arc discharge electric produced in the vicinity of the primer 4 of the ammunition 2 from a high voltage applied between two electrodes, namely an anode A and a cathode C constituted by the metal chamber 5a of the weapon.
- the anode A is mounted on a support S fixed to the back of chamber 5.
- This support includes a body electrically insulating cylindrical 9 which surrounds the anode A, an intermediate ring 10 attached around the body 9 and an annular plug 11 which surrounds the ring 10.
- Anode A is a cylindrical stick which is mounted in the center of the insulating body 9 so as to be axially aligned with ammunition 2 and opposite the primer 4 being slightly recessed inside of body 9.
- This anode A is made of molybdenum, material that resists corrosion of gas combustion, and has a pointed end for promote the formation of the electric arc.
- anode A is connected to the chamber 5 by an electrical circuit 6 comprising a electric power source 12, of the capacitor type high voltage, and an I switch.
- the insulating body 9 is made of ceramic, in particular an alumina ceramic, material chosen in according to its electrical characteristics which ensure insulation of anode A, its characteristics which provide surface cooling for part 13 of the ceramic in contact with the base of ammunition 2 and its mechanical characteristics which offer good resistance to crushing. Indeed, a excessive heating of the ceramic surface 9 in contact with ammunition 2 could cause thermal initiation ammunition without cartridge 2.
- the ceramic of the insulating body 9 is subjected to pressure propellant charge 3 combustion gases, i.e. that it is mechanically stressed at each initiation and it must be avoided that it can crack.
- the ring 10 interposed between the insulating body 9 and the cap 11 made of steel is advantageously made of a material elastically deformable to absorb in particular mechanical stresses transmitted to the body 9 at each initiation of ammunition 2.
- This ring 10 is by example of a relatively soft material, such as steel stainless to homogenize the surfaces in contact and avoid stress concentrations due to surface irregularities. This allows to have a better mechanical resistance of the insulating body 9 and of limit the risk of cracking of the ceramic.
- the anode A, the body insulator 9, the intermediate ring 10 and the plug 11 are assembled together by brazing to ensure the sealing of the support S to the combustion gases.
- This brazing is referenced 17a, 17b and 17c in Figures 1 and 2.
- the ring 10 and the plug 11 are all two with respective chamfers 15 and 16 leaving a free space to receive the solder.
- the plug 11 has at its periphery a thread 18 which allows the support S of the anode A to be fixed at the rear of room 5a.
- the structure thus produced in particular meets the requirements of high thermo-mechanical resistance and sealing of the combustion gases with the outside, the chamber 5a of the weapon being subjected to pressures of the order of 5.10 8 Pa for a temperature instantaneous combustion gas of the order of 2500 ° C over 1 ms.
- the ammunition 2 When the ammunition is loaded into the chamber 5a and centered by its projectile in the barrel of the weapon, the ammunition 2 is supported on the support S of anode A without contact with the metal side wall of bedroom 5. For this purpose, a space is provided lateral 20 between the propellant charge and the internal wall of chamber 5a to avoid risks of thermo-initiation.
- primer 4 To promote dielectric breakdown between primer 4 and anode A, we plan to apply to any the surface of the base of the ammunition 2, a straw 22 in metallic peel paper for example with copper, the metallized side of the glitter being applied against primer 4.
- the composition of primer 4 must be sensitive to sparks, but not very sensitive to shock and friction.
- a known composition of the 4.5 Z model can be used.
- a protective coating 24 under form of varnish layers can be spread over the entire external surface of propellant charge 3 including at level of straw 22 to provide protection effective of the latter against the assaults of the environment.
- the switch 13 is closed so as to apply a 8 kV high voltage electrical pulse delivered by the capacitor 12 between the anode A and the cathode C constituted by chamber 5a.
- An electric arc then forms and the capacitor 12 almost discharges short circuit along a path with the lowest dielectric strength. This path goes through the coating protective 24, metallic glitter 22, space 20 between the propellant charge 3, and the chamber 5a.
- the discharge of capacitor 12 causes a breakdown between anode A and chamber 5a, breakdown which initiates initiation 4.
- the dissipation of the energy released at the level of metallized paillet 22 locally explodes the latter leading to a vaporization of the metal from its face metallic.
- the metallic and thermal shock thus created is transmitted to the initiating composition 4 which is initiated.
- the capacitor 12 is recharged after each initiation by a voltage V.
- V voltage
- the breakdown voltage required to initiate the primer 4 intervenes for a value of about 8 kV, while the dielectric breakdown between the anode A and the ring 10 would only intervene for a voltage greater than 20 kV, which is a factor of security.
- FIG 3 there is shown incorporating the firing system 1 into the breech 5 of a small caliber weapon.
- Cylinder head 5 is extended by the barrel 25, a seal 26 being placed between them.
- a cylinder head lock 28 conventionally locks the barrel 25 to the breech 5.
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Spark Plugs (AREA)
- Vertical, Hearth, Or Arc Furnaces (AREA)
- Electron Sources, Ion Sources (AREA)
- Connector Housings Or Holding Contact Members (AREA)
- Connecting Device With Holders (AREA)
Description
- le corps isolant est également un matériau thermiquement bon conducteur tel que la céramique et en particulier une céramique à base d'alumine,
- la bague intermédiaire est en matériau relativement mou tel que de l'acier inoxydable pour absorber notamment les contraintes mécaniques transmises au corps isolant après initiation de la munition, et
- le bouchon de fixation du support de l'anode est en acier et fixé par vissage à l'arrière de la chambre.
- la figure 1 est une vue en coupe axiale du système de mise à feu selon l'invention,
- la figure 2 représente le détail indiqué par un cercle sur la figure 1, et
- la figure 3 est une vue en coupe montrant l'incorporation du système de mise à feu dans une arme de petit calibre.
Claims (8)
- Système de mise à feu d'une munition sans douille (2), notamment de petit calibre pour une arme à feu portative, par décharge d'un arc électrique qui est produit au voisinage de l'amorce (4) de la munition (2) à partir d'une haute tension appliquée entre deux électrodes, l'électrode (A) formant l'anode étant montée sur un support (S) fixé à l'arrière (5) de la chambre de l'arme, ce support (S) assurant notamment l'isolation électrique de l'anode (A), et l'électrode formant la cathode étant constituée par la chambre métallique (5a) de l'arme, système caractérisé en ce que le support (S) de l'anode (A) assure également l'étanchéité aux gaz de combustion et comprend un corps cylindrique électriquement isolant (9) qui entoure l'anode (A), une bague (10) en un matériau élastiquement déformable montée autour du corps isolant (9), et un bouchon (11) de forme annulaire rapporté autour de la bague (10).
- Système de mise à feu selon la revendication 1, caractérisé en ce que l'anode (A), le corps isolant (9), la bague (10) et le bouchon (11) sont assemblés les uns aux autres par brasage.
- Système de mise à feu selon la revendication 1 ou 2, caractérisé en ce que le bouchon (11) du support (S) de l'anode est fixé par vissage dans la partie arrière de la chambre (5) de l'arme.
- Système de mise à feu selon l'une quelconque des revendications précédentes, caractérisé en ce que l'anode (A) est sous la forme d'un bâtonnet cylindrique à bout pointu monté au centre du corps isolant (9) de manière à être axialement aligné avec la munition (2) et en regard de l'amorce (4) de la munition (2).
- Système de mise à feu selon la revendication 4, caractérisé en ce que le corps isolant (9) est en matériau également thermiquement bon conducteur, tel que de la céramique.
- Système selon la revendication 5, caractérisé en ce que l'anode (A) est en molybdène, le corps isolant (9) en céramique à base d'alumine, la bague (10) en acier inoxydable et le bouchon (11) en acier.
- Système selon l'une quelconque des revendications précédentes, caractérisé en ce que la surface (13) du corps isolant (9) sur laquelle vient en appui la munition (2) est sensiblement égale à celle du culot de la munition (2).
- Système de mise à feu selon l'une quelconque des revendications précédentes, caractérisé en ce qu'un paillet métallisé (22) est appliqué sur l'amorce (4) des munitions.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR9414912 | 1994-12-12 | ||
FR9414912A FR2728066B1 (fr) | 1994-12-12 | 1994-12-12 | Systeme de mise a feu par arc electrique d'une munition sans douille |
Publications (2)
Publication Number | Publication Date |
---|---|
EP0717256A1 EP0717256A1 (fr) | 1996-06-19 |
EP0717256B1 true EP0717256B1 (fr) | 2000-03-15 |
Family
ID=9469698
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP95402531A Expired - Lifetime EP0717256B1 (fr) | 1994-12-12 | 1995-11-13 | Système de mise à feu par arc électrique d'une munition sans douille |
Country Status (5)
Country | Link |
---|---|
US (1) | US5608982A (fr) |
EP (1) | EP0717256B1 (fr) |
AT (1) | ATE190714T1 (fr) |
DE (1) | DE69515614T2 (fr) |
FR (1) | FR2728066B1 (fr) |
Families Citing this family (11)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5755056A (en) | 1996-07-15 | 1998-05-26 | Remington Arms Company, Inc. | Electronic firearm and process for controlling an electronic firearm |
US6374525B1 (en) * | 1999-04-14 | 2002-04-23 | Nils Thomas | Firearm having an electrically switched ignition system |
US6405473B1 (en) * | 2000-08-18 | 2002-06-18 | Smith & Wesson Corp. | Slide assembly for a firearm |
US6785996B2 (en) * | 2001-05-24 | 2004-09-07 | R.A. Brands, Llc | Firearm orientation and drop sensor system |
US6862996B2 (en) * | 2002-10-15 | 2005-03-08 | Mark Key | Projectile for rapid fire gun |
ATE544998T1 (de) * | 2003-05-23 | 2012-02-15 | Ra Brands Llc | Verschlussanordnung mit verriegelungssystem |
ITMI20111578A1 (it) * | 2011-09-02 | 2013-03-03 | Beretta Armi Spa | Barriera termica per armi da fuoco e arma da fuoco provvista di tale barriera termica |
KR101280863B1 (ko) * | 2011-11-08 | 2013-07-03 | 국방과학연구소 | 대전류 전달이 가능한 폐쇄기 및 이를 구비하는 화포 |
US10436540B2 (en) | 2016-01-13 | 2019-10-08 | Brian Edward Bascom | Auto-loading firearm with selectable live fire and training modes |
WO2019013806A1 (fr) | 2017-07-14 | 2019-01-17 | Mustang Industrial Design, Inc. | Arme à feu à marteau à chargement automatique fonctionnant en mode de tir réel ou en mode d'entraînement |
US10782113B2 (en) * | 2018-10-05 | 2020-09-22 | Axon Enterprise, Inc. | Systems and methods for ignition in a conducted electrical weapon |
Family Cites Families (22)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2677803A (en) * | 1950-09-12 | 1954-05-04 | Wallace G Rork | Proving process for primers of electrically fired ammunition |
US3299812A (en) * | 1965-01-29 | 1967-01-24 | United Shoe Machinery Corp | Electric ignition cartridges |
DE1578234A1 (de) * | 1965-05-05 | 1971-01-07 | Smith And Wesson Inc | Elektrisches Gewehr und dafuer geeignete Munition |
DE1291262B (de) * | 1965-11-17 | 1969-03-20 | Rheinmetall Gmbh | Verbrennbarer Kartuschboden |
US3777387A (en) * | 1968-06-14 | 1973-12-11 | Thiokol Chemical Corp | Firearm and cartridge therefor |
US3748770A (en) * | 1969-10-02 | 1973-07-31 | Gen Electric | Ammunition high voltage electrical ignition system |
US3779167A (en) * | 1970-01-21 | 1973-12-18 | Olin Corp | Electrical initiator |
US3685392A (en) * | 1970-02-12 | 1972-08-22 | Remington Arms Co Inc | Laser ignition system |
US3730094A (en) * | 1970-06-12 | 1973-05-01 | Us Army | Energetic protective coating for caseless ammunition |
DE2048743A1 (de) * | 1970-10-03 | 1973-05-30 | Mauser Werke Ag | Vorrichtung zum ausloesen einer initialzuendung fuer die treibladung von patronen auf elektrischem wege |
US3714728A (en) * | 1970-12-22 | 1973-02-06 | Us Army | Compressible primer contact and fixed firing pin assembly |
BE794600A (fr) * | 1972-01-28 | 1973-05-16 | Usel Hubert | Cartouche sans etui pour mise a feu electrique |
US4207796A (en) * | 1974-06-20 | 1980-06-17 | The United States Of America As Represented By The Secretary Of The Navy | Ordnance induction firing system |
DE3012497A1 (de) * | 1980-03-31 | 1981-10-08 | Hilti AG, 9494 Schaan | Verfahren zum herstellen einer zuendelektrode |
GB2234335B (en) * | 1980-07-07 | 1991-06-26 | Marconi Co Ltd | Systems for firing propellant charges |
US4377113A (en) * | 1981-02-09 | 1983-03-22 | Florence John R | Rocket firing system |
DE3237483A1 (de) * | 1982-10-09 | 1984-05-03 | Licentia Patent-Verwaltungs-Gmbh, 6000 Frankfurt | Anordnung zum kontaktlosen elektrischen anzuenden von explosiven ladungen |
US4481859A (en) * | 1983-03-09 | 1984-11-13 | General Electric Company | Gatling gun control system |
DE3836721A1 (de) * | 1988-10-28 | 1991-10-31 | Rheinmetall Gmbh | Induktive anzuendvorrichtung |
GB2241563B (en) * | 1989-04-18 | 1993-09-29 | Royal Ordnance Plc | The initiation of propellants |
US5074189A (en) * | 1989-12-22 | 1991-12-24 | Legend Ammunition, Inc. | Electrically-fired and magnetically actuated firearm |
US5301448A (en) * | 1992-09-15 | 1994-04-12 | Colt's Manufacturing Company Inc. | Firearm safety system |
-
1994
- 1994-12-12 FR FR9414912A patent/FR2728066B1/fr not_active Expired - Fee Related
-
1995
- 1995-11-13 AT AT95402531T patent/ATE190714T1/de active
- 1995-11-13 DE DE69515614T patent/DE69515614T2/de not_active Expired - Lifetime
- 1995-11-13 EP EP95402531A patent/EP0717256B1/fr not_active Expired - Lifetime
- 1995-12-05 US US08/567,584 patent/US5608982A/en not_active Expired - Lifetime
Also Published As
Publication number | Publication date |
---|---|
DE69515614T2 (de) | 2000-07-06 |
FR2728066A1 (fr) | 1996-06-14 |
FR2728066B1 (fr) | 1997-01-24 |
US5608982A (en) | 1997-03-11 |
EP0717256A1 (fr) | 1996-06-19 |
DE69515614D1 (de) | 2000-04-20 |
ATE190714T1 (de) | 2000-04-15 |
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