EP1258695A1 - Geschossboden für eine mit einem elektrischen Zünder versehene Munition - Google Patents

Geschossboden für eine mit einem elektrischen Zünder versehene Munition Download PDF

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Publication number
EP1258695A1
EP1258695A1 EP02291111A EP02291111A EP1258695A1 EP 1258695 A1 EP1258695 A1 EP 1258695A1 EP 02291111 A EP02291111 A EP 02291111A EP 02291111 A EP02291111 A EP 02291111A EP 1258695 A1 EP1258695 A1 EP 1258695A1
Authority
EP
European Patent Office
Prior art keywords
base
igniter
ring
base according
conductive
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.)
Granted
Application number
EP02291111A
Other languages
English (en)
French (fr)
Other versions
EP1258695B1 (de
Inventor
Jean-François Pierrot
Jean-Luc Taillandier
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.)
Giat Industries SA
Original Assignee
Giat Industries SA
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 Giat Industries SA filed Critical Giat Industries SA
Publication of EP1258695A1 publication Critical patent/EP1258695A1/de
Application granted granted Critical
Publication of EP1258695B1 publication Critical patent/EP1258695B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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
    • F42B5/18—Caseless ammunition; Cartridges having combustible cases
    • F42B5/181—Caseless ammunition; Cartridges having combustible cases consisting of a combustible casing wall and a metal base; Connectors therefor
    • 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
    • F42C—AMMUNITION FUZES; ARMING OR SAFETY MEANS THEREFOR
    • F42C19/00—Details of fuzes
    • F42C19/08—Primers; Detonators
    • F42C19/12—Primers; Detonators electric

Definitions

  • the technical field of the invention is that of ammunition caps which are intended to receive a electric igniter.
  • Such bases are generally secured to a case ammunition and they are intended to ensure when firing sealing against propellant gases.
  • igniters usually have a axial touch to ensure a current supply
  • the current return is generally carried out by through the projectile in contact with ground weapon.
  • the mass of the weapon is used as return conductor there are insulation problems electric.
  • the weapon is energized during the initiation of ammunition which can degrade equipment, in particular electronic, attached to the weapon and also risks injuring the gunmen.
  • igniters high voltage electrical in the form of one or several plasma torches or ignitors.
  • the tensions are then in the order of a few tens of kilo volts.
  • the base according to the invention ensures a reliable electrical connection between an electrical igniter and a weapon system while ensuring an excellent level electrical insulation.
  • Contact resistances present at a base according to the invention are weak and reproducible from one base to another.
  • the invention relates to a base for ammunition intended to receive an electric igniter arranged in a axial bore, base characterized in that it is produced in a metallic material covered by an insulating material and in that it comprises at least one non-conductive zone isolated, constituted by an annular support zone of a shoulder of the base or by at least one conductive ring not insulated and set in a housing fitted on the base.
  • the axial bore includes a thread intended to ensure the fixing of the igniter, the thread being free from insulating material and ensuring an electrical connection between the non-insulated conductive area and the igniter through the base material.
  • the insulating material may be a plastic material or organic.
  • the ring housing can be a groove circular made at a rear face of the base.
  • the housing may have a trapezoidal profile in section.
  • the conductive ring can be made of copper or Brass.
  • the conductive area especially the support area annular of a shoulder of the base, may be covered a metallization of copper or copper alloy.
  • the base according to the invention can advantageously carry an electric igniter comprising at least one plasma igniter.
  • a base 1 according to a first embodiment of the invention comprises a background 2 massive and a cylindrical rim 3 at the end of which a rubber sealing lip 4 is arranged.
  • This base is intended to be fixed to an ammunition case not shown, case conventionally containing a propellant charge and carrying a projectile.
  • the base 1 has a threaded axial bore 5 which receives an igniter 6.
  • the igniter 6 shown here is a plasma igniter. This includes an extended metal tubular body 7 by a diffuser 8 for the plasma generated. This diffuser is drilled with radial holes 9.
  • the body 7 carries a thread 7a allowing its fixing in the thread 5 of the base.
  • the rear part 7b of the body 7 has an enlarged diameter and constitutes a collar axial stop being housed in a countersink 10 of the base.
  • the body 7 has an axial bore 11 inside which is arranged a cylindrical insulating case 12 made in a plastic material likely to ablate, it is say to generate light gases by the action of a plasma.
  • a cylindrical insulating case 12 made in a plastic material likely to ablate, it is say to generate light gases by the action of a plasma.
  • Such a case is generally called a capillary in known plasma torches.
  • Two metal electrodes 13 and 14 are separated by the case insulator 12.
  • the front end 13b of the rear electrode forms a point allowing to constitute a foot for the arch electric which will generate the plasma.
  • An annular front electrode 14 is applied against an internal counterbore 7c of the body 7. It has a peripheral shoulder which is adjusted tightly with the body 7.
  • the front 14 and rear 13 electrodes are separate axially by a distance which is chosen such that (for the chosen electric voltage) the electric field between the electrodes is of the order of 1 mega volt / meter. AT as an example for a voltage between electrodes of 10,000 Volts, the distance will be 10 mm.
  • the rear electrode 13 is held axially by relative to the body 7 by an insulating sleeve 15 which carries a thread 16 allowing its screwing at the level of a tapping rear of the body 7.
  • the socket is supported on a shoulder of the rear electrode 13 and apply this against the case 12, itself in abutment against the electrode before 14.
  • the sleeve 15 is made of an insulating material with high mechanical strength, for example polyoxymethylene.
  • the plasma igniter could also be replaced by another type of electric igniter, for example with wire hot, exploded wire, semiconductor bridge or projected layer (better known as “slapper”).
  • igniters will, however, all have for common points to include, on the one hand an axial touch 13a allowing the arrival of the current and on the other hand a conductive body 7 allowing current return and having a thread.
  • the base 1 is made of a metallic material and it comprises at least one conductive ring 17.
  • This ring 17 is set in a housing 18 arranged on the base.
  • the ring will be made of a malleable material and reduced electrical resistance, for example copper or Brass. The installation of the ring in its housing will be carried out by cold deformation of the ring in its housing by means of a press.
  • the ring is intended, like the touch 13a, for cooperate with a mobile contact integral with a system weapon (not shown).
  • the circular shape of the ring avoids any constraint of angular indexing of the base compared to the weapon.
  • the housing 18 for the ring 17 is a groove circular machined at a rear face 2a of the bottom 2 pellet 1.
  • This housing 18 has in section a profile trapezoidal inside which the material of the ring 17 penetrates when it is put in place. Such a arrangement ensures the attachment of the ring with the base while reducing the electrical resistance of the contact between the ring and the base.
  • the base 1 is covered by an insulating material (shown schematically by the dotted lines 19) which covers substantially its entire surface except for the ring 17 and axial thread 5.
  • This insulating material will for example be a vacuum deposit from 30 to 80 micrometers of a plastic material such as polytetrafluoroethylene (PTFE) or another material insulating organic, such as di-para-zylylene (DPXN).
  • PTFE polytetrafluoroethylene
  • DPXN di-para-zylylene
  • the insulating deposit will be produced after fitting of the ring 17 and the igniter 6. Thus it will also cover the outer surface of the body 7 of the igniter and the transition zones between the base and igniter.
  • a protective sheet for example a self-adhesive plastic
  • This protection will be removed manually after completion of the insulating deposit or else before using the base.
  • first contact mobile abuts against the axial touch 13a and a second movable contact bears against the ring 17.
  • These mobile contacts will for example be carried by the breech closing the chamber of the weapon.
  • the radial distance between the ring 17 and the touch axial 13a is of the order of 50 mm for a caliber of 120mm. There is therefore no risk of seeing an arc appear electric directly between ring and touch for a voltage between 10 and 30 kilo volts.
  • the electrical contact resistances are strongly reduced between ring 17 and base 1 due to the mutual contact surface between these elements which is important, the installation process ensuring by elsewhere an intimate contact between ring 17 and base 1.
  • the electrical contact resistances are also greatly reduced between the base 1 and the body 7 of igniter. In fact the current flows through the thread 7a and complementary thread 5, the surfaces again are relatively important and the tightening ensures the quality of the electrical contact.
  • Figure 3 shows schematically another embodiment of a base according to the invention.
  • This base differs from the previous one in that its rear face has no conductive ring 17.
  • the current return then takes place via a conductive area constituted by an annular bearing face 2b of a shoulder of the base, area which is intended to come into abutment against a conductive surface of the weapon chamber or well preferably against a touch carried by the weapon.
  • the bearing surface 2b of the shoulder is covered with a copper deposit.
  • the rest of the external surface of the base 1 is covered with an insulating material 19.
  • a material plastic such as polytetrafluoroethylene (PTFE) or di-para-zylylene (DPXN).
  • the current will reach the igniter via ground conductor of the base and the conductor body of the igniter, the electrical contact between these two elements being obtained by the threaded connection base / igniter.
  • the current return will be carried out by the axial touch of the igniter.
  • This embodiment of the invention is more particularly suitable for medium or small munitions caliber (caliber less than 50mm).

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Spark Plugs (AREA)
  • Fuses (AREA)
  • Ignition Installations For Internal Combustion Engines (AREA)
  • Lock And Its Accessories (AREA)
  • Catching Or Destruction (AREA)
EP02291111A 2001-05-18 2002-05-03 Geschossboden für eine mit einem elektrischen Zünder versehene Munition Expired - Lifetime EP1258695B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR0106688A FR2824898B1 (fr) 2001-05-18 2001-05-18 Culot pour munition destine a recevoir un allumeur electrique
FR0106688 2001-05-18

Publications (2)

Publication Number Publication Date
EP1258695A1 true EP1258695A1 (de) 2002-11-20
EP1258695B1 EP1258695B1 (de) 2006-08-09

Family

ID=8863512

Family Applications (1)

Application Number Title Priority Date Filing Date
EP02291111A Expired - Lifetime EP1258695B1 (de) 2001-05-18 2002-05-03 Geschossboden für eine mit einem elektrischen Zünder versehene Munition

Country Status (5)

Country Link
US (1) US6644204B2 (de)
EP (1) EP1258695B1 (de)
AT (1) ATE335985T1 (de)
DE (1) DE60213709T2 (de)
FR (1) FR2824898B1 (de)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6796243B2 (en) * 2002-03-26 2004-09-28 Rheinmetall W & M Gmbh Cartridge
FR2915564A1 (fr) * 2007-04-30 2008-10-31 Nexter Munitions Sa Dispositif electromecanique d'adaptation d'un obus
FR3092660A1 (fr) 2019-02-13 2020-08-14 Nexter Munitions Fusee pour un projectile destine a etre tire par un canon

Families Citing this family (34)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SE524623C2 (sv) * 2002-08-08 2004-09-07 Bofors Defence Ab Isolerad patronhylsa och ammunition, förfarande för tillverkning av dylika hylsor och ammunition samt användning av dylika hylsor och ammunition vid flera skilda vapensystem
DE102006017100B4 (de) * 2006-04-07 2012-10-31 Bae Systems Bofors Ab Zünder
US7878120B1 (en) * 2007-12-20 2011-02-01 The United States Of America As Represented By The Secretary Of The Army Ammunition data link
US8607702B1 (en) * 2010-01-15 2013-12-17 The United States Of America As Represented By The Secretary Of The Army Low energy ignition system for large and medium caliber ammunition
US11340050B2 (en) 2010-11-10 2022-05-24 True Velocity Ip Holdings, Llc Subsonic polymeric ammunition cartridge
US11047664B2 (en) 2010-11-10 2021-06-29 True Velocity Ip Holdings, Llc Lightweight polymer ammunition cartridge casings
US11313654B2 (en) 2010-11-10 2022-04-26 True Velocity Ip Holdings, Llc Polymer ammunition having a projectile made by metal injection molding
US8561543B2 (en) 2010-11-10 2013-10-22 True Velocity, Inc. Lightweight polymer ammunition cartridge casings
US10352670B2 (en) 2010-11-10 2019-07-16 True Velocity Ip Holdings, Llc Lightweight polymer ammunition cartridge casings
US10480915B2 (en) 2010-11-10 2019-11-19 True Velocity Ip Holdings, Llc Method of making a polymeric subsonic ammunition cartridge
US11231257B2 (en) 2010-11-10 2022-01-25 True Velocity Ip Holdings, Llc Method of making a metal injection molded ammunition cartridge
US10876822B2 (en) 2017-11-09 2020-12-29 True Velocity Ip Holdings, Llc Multi-piece polymer ammunition cartridge
US9885551B2 (en) 2010-11-10 2018-02-06 True Velocity, Inc. Subsonic polymeric ammunition
US11300393B2 (en) 2010-11-10 2022-04-12 True Velocity Ip Holdings, Llc Polymer ammunition having a MIM primer insert
US10408592B2 (en) 2010-11-10 2019-09-10 True Velocity Ip Holdings, Llc One piece polymer ammunition cartridge having a primer insert and methods of making the same
US9835427B2 (en) * 2016-03-09 2017-12-05 True Velocity, Inc. Two-piece primer insert for polymer ammunition
US10760882B1 (en) 2017-08-08 2020-09-01 True Velocity Ip Holdings, Llc Metal injection molded ammunition cartridge
US11733015B2 (en) 2018-07-06 2023-08-22 True Velocity Ip Holdings, Llc Multi-piece primer insert for polymer ammunition
WO2020010100A1 (en) 2018-07-06 2020-01-09 True Velocity Ip Holdings, Llc Three-piece primer insert for polymer ammunition
US10731957B1 (en) 2019-02-14 2020-08-04 True Velocity Ip Holdings, Llc Polymer ammunition and cartridge having a convex primer insert
US10704879B1 (en) 2019-02-14 2020-07-07 True Velocity Ip Holdings, Llc Polymer ammunition and cartridge having a convex primer insert
USD893668S1 (en) 2019-03-11 2020-08-18 True Velocity Ip Holdings, Llc Ammunition cartridge nose having an angled shoulder
USD893665S1 (en) 2019-03-11 2020-08-18 True Velocity Ip Holdings, Llc Ammunition cartridge nose having an angled shoulder
USD893667S1 (en) 2019-03-11 2020-08-18 True Velocity Ip Holdings, Llc Ammunition cartridge nose having an angled shoulder
USD893666S1 (en) 2019-03-11 2020-08-18 True Velocity Ip Holdings, Llc Ammunition cartridge nose having an angled shoulder
USD891567S1 (en) 2019-03-12 2020-07-28 True Velocity Ip Holdings, Llc Ammunition cartridge nose having an angled shoulder
USD891569S1 (en) 2019-03-12 2020-07-28 True Velocity Ip Holdings, Llc Ammunition cartridge nose having an angled shoulder
USD891570S1 (en) 2019-03-12 2020-07-28 True Velocity Ip Holdings, Llc Ammunition cartridge nose
USD892258S1 (en) 2019-03-12 2020-08-04 True Velocity Ip Holdings, Llc Ammunition cartridge nose having an angled shoulder
USD891568S1 (en) 2019-03-12 2020-07-28 True Velocity Ip Holdings, Llc Ammunition cartridge nose having an angled shoulder
WO2020197868A2 (en) 2019-03-19 2020-10-01 True Velocity Ip Holdings, Llc Methods and devices metering and compacting explosive powders
USD894320S1 (en) 2019-03-21 2020-08-25 True Velocity Ip Holdings, Llc Ammunition Cartridge
EP3999799A4 (de) 2019-07-16 2023-07-26 True Velocity IP Holdings, LLC Polymermunition mit ausrichthilfe, patrone und verfahren zu deren herstellung
US11988491B1 (en) * 2021-07-29 2024-05-21 Revolutionary Rounds L.L.C. Projectile and caseless cartridge

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2056631A (en) * 1979-08-14 1981-03-18 Buck Chem Tech Werke Contact head for projectiles capable of being fired from electrically actuable launcher
EP0310517A1 (de) * 1987-10-01 1989-04-05 GIAT Industries Geschossboden für eine mit einem elektrischen Zünder versehene Grosskalibermunition
US5355764A (en) 1992-05-04 1994-10-18 Fmc Corporation Plasma actuated ignition and distribution pump
WO1995030874A1 (en) * 1994-05-05 1995-11-16 General Dynamics Land Systems, Inc. Plasma generator for electrothermal gun cartridge
US5503081A (en) 1993-11-22 1996-04-02 Fmc Corp Annular plasma injector
EP0905470A1 (de) 1997-09-24 1999-03-31 Giat Industries Zündbauelement für pyrotechnische Zusammensetzungen oder Treibladungen
DE19853291A1 (de) * 1998-11-19 2000-05-31 Tzn Forschung & Entwicklung Aus einer großkalibrigen Waffe verschießbare Patrone

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5044278A (en) * 1989-07-03 1991-09-03 James E. Meagher Electrically ignitible cartridge system

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2056631A (en) * 1979-08-14 1981-03-18 Buck Chem Tech Werke Contact head for projectiles capable of being fired from electrically actuable launcher
EP0310517A1 (de) * 1987-10-01 1989-04-05 GIAT Industries Geschossboden für eine mit einem elektrischen Zünder versehene Grosskalibermunition
US5355764A (en) 1992-05-04 1994-10-18 Fmc Corporation Plasma actuated ignition and distribution pump
US5503081A (en) 1993-11-22 1996-04-02 Fmc Corp Annular plasma injector
WO1995030874A1 (en) * 1994-05-05 1995-11-16 General Dynamics Land Systems, Inc. Plasma generator for electrothermal gun cartridge
EP0905470A1 (de) 1997-09-24 1999-03-31 Giat Industries Zündbauelement für pyrotechnische Zusammensetzungen oder Treibladungen
DE19853291A1 (de) * 1998-11-19 2000-05-31 Tzn Forschung & Entwicklung Aus einer großkalibrigen Waffe verschießbare Patrone

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6796243B2 (en) * 2002-03-26 2004-09-28 Rheinmetall W & M Gmbh Cartridge
FR2915564A1 (fr) * 2007-04-30 2008-10-31 Nexter Munitions Sa Dispositif electromecanique d'adaptation d'un obus
FR3092660A1 (fr) 2019-02-13 2020-08-14 Nexter Munitions Fusee pour un projectile destine a etre tire par un canon
WO2020165699A1 (fr) 2019-02-13 2020-08-20 Nexter Munitions Fusee pour un projectile destine a etre tire par un canon
US11774225B2 (en) 2019-02-13 2023-10-03 Nexter Munitions Fuze for a projectile intended to be fired by a cannon

Also Published As

Publication number Publication date
US20020170455A1 (en) 2002-11-21
FR2824898A1 (fr) 2002-11-22
DE60213709D1 (de) 2006-09-21
US6644204B2 (en) 2003-11-11
ATE335985T1 (de) 2006-09-15
EP1258695B1 (de) 2006-08-09
DE60213709T2 (de) 2007-08-16
FR2824898B1 (fr) 2003-09-12

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