EP0310517B1 - Geschossboden für eine mit einem elektrischen Zünder versehene Grosskalibermunition - Google Patents

Geschossboden für eine mit einem elektrischen Zünder versehene Grosskalibermunition Download PDF

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Publication number
EP0310517B1
EP0310517B1 EP88402471A EP88402471A EP0310517B1 EP 0310517 B1 EP0310517 B1 EP 0310517B1 EP 88402471 A EP88402471 A EP 88402471A EP 88402471 A EP88402471 A EP 88402471A EP 0310517 B1 EP0310517 B1 EP 0310517B1
Authority
EP
European Patent Office
Prior art keywords
shell base
base
weapon
contact surface
axial housing
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
EP88402471A
Other languages
English (en)
French (fr)
Other versions
EP0310517A1 (de
Inventor
Jean-Claude Sauvestre
Patrick Carnis
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
Priority to AT88402471T priority Critical patent/ATE78333T1/de
Publication of EP0310517A1 publication Critical patent/EP0310517A1/de
Application granted granted Critical
Publication of EP0310517B1 publication Critical patent/EP0310517B1/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
    • F42B5/08—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
    • F42B5/38—Separately-loaded propellant charges, e.g. cartridge bags
    • 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 field of the present invention is that of caps or socket bases for ammunition and in particular for large caliber ammunition carrying an electric igniter.
  • the propellant charge is ignited by an igniter tube, integral with the base, receiving the electrical ignition current via an electrode on which a contact secured with the cylinder head; the return of current is ensured by the electrical ground of the weapon.
  • Such caps are heavy to handle, moreover they must fulfill a sealing function between the chamber of the weapon and the breech, and are thus provided with an additional sealing device of the type described in the patents.
  • These sealing devices do not always have all the guarantees of efficiency and the metal caps may present, after firing, permanent deformations making it difficult to extract them from the chamber.
  • it includes a metal insert whose function is to ensure good mechanical strength of the base and to control the radial elastic deformation thereof.
  • This insert is not to make any electrical connection between the igniter tuba and the weapon.
  • Patent DE-B-1029266 describes a combustible primer comprising a metallized sheet which after shaping is split by milling so as to produce the two conductors for supplying the current at the level of a priming composition.
  • the milled slot constitutes an interval at which the ignition spark occurs.
  • the patent US-A-3535978 also describes a primer in which the arrival of the electric current is done by two electrodes which are obtained from a metal clip, mounted in the insulating base, then split at its median part. so as to realize the interval at which the ignition spark occurs.
  • US-A-3779167 describes the mounting of a semiconductor film primer in a cartridge of hunting ammunition.
  • the cartridge includes a plastic case closed by a metal bottom.
  • the latter has an internal cylindrical part in which is disposed a metal tube receiving the primer as well as an electrode assembly.
  • the invention also provides a reliable electrical connection by providing electrical contacts chamber-base and base-igniter having a low contact resistance.
  • the base according to the invention may be secured to a socket comprising a case.
  • the subject of the invention is therefore a base for a large caliber ammunition intended to be placed in a chamber of a weapon, base made of a material which does not conduct electricity, comprising an axial housing intended to receive an igniter electrical and at least one metal insert extending radially between the axial housing and the periphery of the base, characterized in that at least one insert consists of a grid embedded in the non-conductive material and has a thickness of less than 2 mm, and in that the grid comprises at least one flush contact zone at a surface of the base, this zone constituting one of the means of electrical connection between the igniter and the weapon.
  • a flush contact area may be located at an interior contact surface of the axial housing
  • a flush contact area can be located at an external peripheral contact surface of the base coming into contact with the weapon.
  • the internal and / or external peripheral contact surface may be a flat annular surface.
  • the internal and / or external peripheral contact surface can be covered with a conductive varnish.
  • the internal and / or external peripheral contact surface can be metallized.
  • the invention also relates to a base for a large caliber ammunition intended to be placed in a chamber of a weapon, base made of a material which does not conduct electricity, comprising an axial housing intended to receive an electric igniter and at least one metal insert extending radially between the axial housing and the periphery of the base, characterized in that at least one insert consists of a plate forming a cup having a thickness of less than 2 mm, and in that the plate is pinched at its periphery between the non-conductive material and a ring integral with the base and coming into contact with the weapon, and also pinched at the axial housing between the non-conductive material and the igniter.
  • the invention will also apply to a socket comprising a case integral with a base, case and base which can be made of the same material and in a single piece.
  • the non-conductive material will preferably be a technopolymer.
  • a weapon 1 shown diagrammatically comprises a chamber 2 and a tube 13.
  • a munition constituted by a projectile 3 placed in the tube 13, a propellant charge 4 located in the chamber 2 and constituted for example by gargousses, and a base 5 comprising an axial housing 7 in which an electric igniter 6 is fixed.
  • Figure 2 shows an enlarged base 5 according to a first embodiment of the invention.
  • the base 5 made of non-conductive material, for example a thermoplastic, is in contact with the weapon on the one hand at the level of a cylindrical peripheral contact surface 9 fitted in the chamber, and on the other hand at the level of a planar peripheral contact surface 10 of a shoulder 14 formed on the base.
  • Other modes of connection between the igniter 6 and the base are conceivable; the igniter could be forcibly mounted in the axial housing, it would suffice to provide a tight fit between these two elements, the igniter 6 could then be in contact with a cylindrical inner contact surface 12 of the axial housing 7.
  • the contact surfaces 10 and 11 are here annular surfaces at which the metal constituting the grid appears, the electric igniter 6, screwed in its housing will come to bear on a annular metal zone which, although of reduced thickness (less than 2 mm, for example 0.3 mm) is an integral part of the base and has good mechanical strength; a vigorous clamping of the igniter is possible which guarantees a low contact resistance (of the order of 4 ohms).
  • the shoulder 14 applied strongly against the weapon by the breech will guarantee a low electrical resistance of contact with a strong mechanical resistance of the conductive zone.
  • the mass of the insert may represent only 0.2% to 10% of the total mass of the base.
  • Figure 3 is a perspective view of the base of Figure 2, this view clearly shows the internal and peripheral annular contact surfaces 10 and 11, as well as the corresponding flush contact areas integral with the grid.
  • Figures 4 and 5 show a second embodiment of the invention.
  • the base 5 of non-conductive material carries a metal ring 15 which has the function of mechanically reinforcing the shoulder 14, which can be useful with certain types of artillery.
  • the insert 8 is constituted here by a metal plate forming a bowl, pinched at its periphery between the ring 15 and the non-conductive material. This plate is flush with the cylindrical and flat internal contact surfaces (respectively 12 and 11) of the axial housing 7.
  • the electrical contact is also established between the insert 8 and the ring 15.
  • the latter is in contact with the weapon, thus the ring 15 acts as an electrical connection means between the insert and the weapon.
  • the ring 15 acts as an electrical connection means between the insert and the weapon.
  • it was the flush contact zone at the level of the peripheral contact surface 10 which played the role of means of electrical connection between insert and weapon.
  • This embodiment therefore makes it possible to reconcile the advantages linked to the invention (low thickness, therefore low mass, of the inserts and high quality of the electrical contacts) with an additional requirement in terms of the mechanical strength of the shoulder 14 on which will come act a weapon extractor (not shown).
  • FIGS. 6 to 8 illustrate such variants.
  • an insert 8 constituted by a flat metallic grid is flush with the level of the flat internal contact surface 11 of the axial housing 7, and in contact with a ring 15.
  • the base 5 does not have a ring 15
  • the insert 8 in the form of a grid
  • the insert 8 is flush both at the level of the plane peripheral contact surface 10 of the base, and at the level of the surface of cylindrical inner contact 12 of the axial housing.
  • the insert 8 has two flush contact zones at the level of the internal, cylindrical contact surface 12, and of the cylindrical peripheral contact surface 9.
  • FIG. 9 shows in half view a base comprising 4 inserts, regularly spaced from one another and each constituted by a strip of flush grid at the desired surfaces. This configuration can be combined with the contact areas shown in Figures 2, 6, 7, 8.
  • An advantageous embodiment of the invention will consist of injecting the non-conductive material (thermoplastic) on the insert (s), then making the latter flush by machining at the level of the intended contact zones. A conductive varnish or a metallization can then be applied to the latter.
  • the present invention will finally also apply to sockets constituted by a cylindrical case (made of plastic or combustible material) secured to a base.
  • the bottom of the socket plays the role of the base described above.

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Geophysics And Detection Of Objects (AREA)
  • Radar Systems Or Details Thereof (AREA)
  • Air Bags (AREA)
  • Floor Finish (AREA)
  • Elimination Of Static Electricity (AREA)
  • Conductive Materials (AREA)
  • Resistance Heating (AREA)
  • Fuses (AREA)

Claims (10)

  1. Bodensatz für großkalibrige Munition, die in die Kammer (2) einer Waffe (1 eingeführt werden soll, wobei der Bodensatz aus einem elektrisch nicht leitenden Material mit einer axialen Aufnahmevorrichtung (7) zur Aufnahme eines elektrischen Zünders (6) und mindestens einem metallischen Einschluß besteht, der sich radial zwischen der axialen Aufnahmevorrichtung und der Hülsenperipherie befindet, und die dadurch gekennzeichnet ist, daß mindestens ein Einschluß (8) aus einem in das nichtleitende Material eingelassenen Gitter besteht, dessen Dicke geringer als 2 mm ist, und daß das Gitter mindestens eine Oberflächenkontaktzone auf der Höhe einer der Hülsenoberflächen aufweist, wobei diese Zone eine der Möglichkeiten einer elektrischen Verbindung zwischen Zünder und Waffe bildet.
  2. Bodensatz entsprechend Patentanspruch 1, die dadurch gekennzeichnet ist, daß eine Oberflächenkontaktzone sich auf der Höhe einer inneren Kontaktoberfläche (11, 12) der axialen Aufnahmevorrichtung (7) befindet.
  3. Bodensatz entsprechend Patentanspruch 1 oder 2, die dadurch gekennzeichnet ist, daß eine Oberflächenkontaktzone sich auf der Höhe einer äußeren, peripheren Kontaktoberfläche (10) der Hülse befindet, die in Kontakt mit der Waffe kommt.
  4. Bodensatz entsprechend Patentanspruch 2 oder 3, die dadurch gekennzeichnet ist, daß eine innere Kontaktoberfläche (11, 12) und/oder eine externe periphere Kontaktoberfläche (10) eine flache, ringförmige Oberfläche ist.
  5. Bodensatz gemäß einem der Patentansprüche 2 bis 4, die dadurch gekennzeichnet ist, daß die innere Kontaktoberfläche (11, 12) und/oder die externe periphere Kontaktoberfläche (10) mit Leitlack überzogen sind.
  6. Bodensatz gemäß einem der Patentansprüche 2 bis 4, die dadurch gekennzeichnet ist, daß die innere Kontaktoberfläche (11, 12) und/oder die externe periphere Kontaktoberfläche (10) metallisiert sind.
  7. Bodensatz für großkalibrige Munition, die in die Kammer (2) einer Waffe (1) eingeführt werden soll, wobei der Bodensatz aus einem elektrisch nicht leitenden Material mit einer axialen Aufnahmevorrichtung (7) zur Aufnahme eines elektrischen Zünders (6) und mindestens einem metallischen Einschluß besteht, der sich radial zwischen der axialen Aufnahmevorrichtung und der Hülsenperipherie befindet, und die dadurch gekennzeichnet ist, daß mindestens ein Einschluß (8) aus einer schalenförmigen Platte besteht, deren Dicke geringer als 2 mm ist, und darin, daß die Platte auf der Höhe ihres Randes zwischen dem nichtleitenden Material und einem Ring (15) eingeklemmt ist, der fest mit der Hülse verbunden ist und in Kontakt mit der Waffe kommt, und auf der Höhe der axialen Aufnahmevorrichtung zwischen dem nichtleitenden Material und dem Zünder (6) eingeklemmt ist.
  8. Gehäuse für Munition, bestehend aus einem mit einer Hülze verbundenen Bodensatz, das dadurch gekennzeichnet ist, daß es ein Bodensatz gemäß den Patentansprüchen 1 bis 7 besitzt.
  9. Gehäuse entsprechend Patentanspruch 8, das dadurch gekennzeichnet ist, daß der Bodensatz und die Hülze aus demselben Material hergestellt sind.
  10. Gehäuse entsprechend Patentanspruch 9, das dadurch gekennzeichnet ist, daß der Bodensatz und die Hülze aus einem Stück hergestellt sind.
EP88402471A 1987-10-01 1988-09-30 Geschossboden für eine mit einem elektrischen Zünder versehene Grosskalibermunition Expired - Lifetime EP0310517B1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT88402471T ATE78333T1 (de) 1987-10-01 1988-09-30 Geschossboden fuer eine mit einem elektrischen zuender versehene grosskalibermunition.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR8713562 1987-10-01
FR8713562A FR2621388B1 (fr) 1987-10-01 1987-10-01 Culot pour munition de gros calibre comportant un allumeur electrique

Publications (2)

Publication Number Publication Date
EP0310517A1 EP0310517A1 (de) 1989-04-05
EP0310517B1 true EP0310517B1 (de) 1992-07-15

Family

ID=9355413

Family Applications (1)

Application Number Title Priority Date Filing Date
EP88402471A Expired - Lifetime EP0310517B1 (de) 1987-10-01 1988-09-30 Geschossboden für eine mit einem elektrischen Zünder versehene Grosskalibermunition

Country Status (6)

Country Link
EP (1) EP0310517B1 (de)
AT (1) ATE78333T1 (de)
DE (1) DE3872818T2 (de)
FR (1) FR2621388B1 (de)
IL (1) IL87872A0 (de)
NO (1) NO166675C (de)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2648223B1 (fr) * 1989-06-09 1994-03-25 Thomson Brandt Armements Inflammateur pyrotechnique pour charges militaires ou propulseur ou generateur de gaz
DE19853291C2 (de) * 1998-11-19 2001-10-11 Tzn Forschung & Entwicklung Aus einer großkalibrigen Waffe verschießbare Patrone
DE19853290C2 (de) * 1998-11-19 2001-10-11 Tzn Forschung & Entwicklung Aus einer großkalibrigen Waffe verschießbare Patrone
FR2824898B1 (fr) 2001-05-18 2003-09-12 Giat Ind Sa Culot pour munition destine a recevoir un allumeur electrique

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE47212C (de) * AMERICAN ELECTRIC ARMS AND AMMUNITION COMPANY in New-York City, 42 Broadway, V. St. A Neuerung an dem unter Nr. 33599 patentirten elektrischen Zündhütchen
DE1029266B (de) * 1956-02-27 1958-04-30 Dynamit Nobel Ag Elektrisches Zuendhuetchen fuer Patronen
US3535978A (en) * 1965-06-04 1970-10-27 Dynamit Nobel Ag Method for producing an electrically ignitable primer flement
DE1728411A1 (de) * 1966-10-20 1972-01-05 Kamson Res Ltd Patrone fuer Handfeuerwaffe
US3779167A (en) * 1970-01-21 1973-12-18 Olin Corp Electrical initiator
US4206707A (en) * 1977-11-22 1980-06-10 General Dynamics Corportation Electromagnetic hazard suppression techniques
GB2068087B (en) * 1980-01-25 1983-05-25 Wallop Ind Ltd Pyrotechnic cartridge
US4324060A (en) * 1980-03-17 1982-04-13 Lawrence George L Firearm system
FR2593908B1 (fr) * 1986-02-03 1990-04-20 France Etat Armement Dispositif d'allumage capacitif pour charge propulsive

Also Published As

Publication number Publication date
FR2621388B1 (fr) 1989-12-15
NO166675C (no) 1991-08-21
NO166675B (no) 1991-05-13
DE3872818D1 (de) 1992-08-20
NO884366D0 (no) 1988-09-30
NO884366L (no) 1989-04-03
IL87872A0 (en) 1989-03-31
EP0310517A1 (de) 1989-04-05
FR2621388A1 (fr) 1989-04-07
DE3872818T2 (de) 1993-01-21
ATE78333T1 (de) 1992-08-15

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