EP0656522A1 - Douille pour cartouche - Google Patents

Douille pour cartouche Download PDF

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Publication number
EP0656522A1
EP0656522A1 EP94118834A EP94118834A EP0656522A1 EP 0656522 A1 EP0656522 A1 EP 0656522A1 EP 94118834 A EP94118834 A EP 94118834A EP 94118834 A EP94118834 A EP 94118834A EP 0656522 A1 EP0656522 A1 EP 0656522A1
Authority
EP
European Patent Office
Prior art keywords
capsule
ignition
extension
side wall
bell
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
EP94118834A
Other languages
German (de)
English (en)
Other versions
EP0656522B1 (fr
Inventor
Friedrich Müller
Heinz Riess
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.)
Dynamit Nobel GmbH Explosivstoff und Systemtechnik
Original Assignee
Dynamit Nobel AG
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
Priority claimed from DE4341002A external-priority patent/DE4341002A1/de
Application filed by Dynamit Nobel AG filed Critical Dynamit Nobel AG
Publication of EP0656522A1 publication Critical patent/EP0656522A1/fr
Application granted granted Critical
Publication of EP0656522B1 publication Critical patent/EP0656522B1/fr
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
    • F42B5/26—Cartridge cases
    • F42B5/36—Cartridge cases modified for housing an integral firing-cap
    • 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
    • F42C19/10—Percussion caps

Definitions

  • the invention relates to a cartridge case, in particular for firing in small arms, according to the preamble of claim 1.
  • FIGS. 1 and 2 each show in section the rear end of a cartridge case according to the prior art with the primer cap inserted before (FIG. 1) and after the ignition (FIG. 2).
  • a cylindrical sleeve 1 is provided on its rear end face with a ignition bell 4 designed as a cylindrical recess.
  • An ignition cap is inserted flush into the ignition bell 4.
  • the primer consists of a cup-shaped capsule 6 with a capsule bottom and a cylindrical side wall.
  • An ignition charge 2 is pressed onto the capsule base inside the capsule 6. Above the ignition charge 2 there is an anvil 8 with openings for the ignition vapor.
  • the primer cap is anchored in the sleeve 1 by means of ring riveting 3.
  • the firing pin 5 of a weapon hits the capsule base (see FIG. 2), it deforms.
  • the ignition charge 2 is suddenly compressed between the capsule bottom and anvil 8, causing it to ignite.
  • the ignition fumes pass through the openings in the anvil 8 to the ignition channels 11 and from there to the propellant charge, not shown, and ignite it.
  • Cartridge casings in particular, which are fired in small arms, must be gas-tight in the direction of the weapon breech in order to reliably prevent the shooter from being endangered or from being damaged.
  • Primer caps that are particularly free of pollutants are more gas-rich than the previous ones that contain particles and some contain pollutants. This results in significantly higher gas pressures with a very short pressure increase in the development of the shot in the area of the ignition bell. This can lead to gas leakage in the area of the primer, which can be observed particularly in unlocked weapons with a mass lock and rigid firing pins.
  • This gas outlet is indicated by way of example in FIG. 2.
  • the material of the capsule bottom is deformed very strongly plastically in the critical area 7, between the fixed anvil 8 of the primer cap and the firing pin 5, which cannot move back due to its rigid connection to the closure at the moment of ignition. Due to the high gas pressure of the pollutant-free primer cap, the material of the capsule base can be stressed beyond the limit of elongation at break (constriction fracture) in area 7, which can then lead to gas escaping in the direction of the weapon breech or to migration of the primer cap and thus to a leak or one "Blower".
  • the invention has for its object to provide a cartridge case, in particular for firing in small arms, with which the gas tightness in the direction of the weapon breech is significantly improved, especially with gas-rich and pollutant-free igniter charges.
  • this object is achieved in that the ignition bell is provided in the region of the side wall of the capsule with an annular circumferential extension, so that the anvil has space to escape after the ignition charge has been fired and the capsule expanded.
  • the cartridge case according to the invention is not only suitable for small arms, but also for submachine guns, rifles or the like.
  • the side wall of the capsule When pressure is applied, the side wall of the capsule can move into the adjacent extension. This removes the anvil's seat so that it deforms in the radial direction, i.e. can dodge. The consequence of this is that the stresses in the critical area of the capsule base are reduced so significantly that no material constrictions occur and the deformations in the material of the capsule base remain within the range of the plastic expansion. This prevents gas escaping in the direction of the weapon lock.
  • the extension is arranged in the area adjacent to the upper side of the ignition bell, so that the free end of the capsule facing away from the capsule base can deflect into the extension under pressure.
  • the cross section is preferably wedge-shaped or conical. However, other shapes are also possible, such as a round profile, a triangular profile or other geometries. According to the invention, the greatest depth of the extension is provided in the area adjacent to the top of the ignition bell.
  • a stop acting in the radial direction for the free end of the cylindrical side wall of the capsule is arranged between the extension and the top of the ignition bell.
  • the extension advantageously encloses almost half the length of the side wall.
  • FIGS 1 and 2 show the prior art (see introduction to the description).
  • Fig. 3 shows a section of a cartridge case according to the invention before the ignition of the primer.
  • a cylindrical sleeve 1 is at its bottom end that leads to one in this Figure not shown firing pin is facing, provided with a cylindrical recess which forms an ignition bell 4.
  • An ignition cap is pressed into the ignition bell 4 flush with the bottom surface of the sleeve 1.
  • the primer cap is firmly anchored in the sleeve 1 via an additional ring rivet 3.
  • the primer or igniter consists of a cup-shaped capsule 6 with a capsule bottom and a cylindrical side wall. The opening of the capsule 6 faces the ignition channels 11.
  • An ignition charge 2 which is protected by a cover 12 is pressed onto the base of the capsule.
  • the cover 12 can e.g. a lacquer coating or a film.
  • An anvil 8 is seated on the ignition charge 2 or the cover 12. This anvil 8 is described in more detail in FIG. 5.
  • the anvil 8 is a separate component, i.e. not formed in one piece with the sleeve 1 and lies with its outer surface except for openings or recesses completely on the inner surface of the side wall of the capsule 6.
  • the anvil 8 is supported in the longitudinal direction of the sleeve 1 on the one hand on the top of the ignition bell 4 and on the other hand on the ignition charge 2.
  • the openings in the anvil 8 are arranged in such a way that the fumes can reach the ignition channels 11.
  • the ignition bell 4 is provided with an extension 9 in the region of the side wall of the capsule 6.
  • Fig. 3 shows an embodiment in which the extension 9 in Cross-section is wedge-shaped or conical.
  • the greatest depth of the extension 9 - viewed in the radial direction - is provided at the top of the ignition bell 4.
  • the top side means the end face of the ignition bell 4, into which the ignition channels 11 open.
  • the extension 9 represents a circumferential undercut of the ignition bell 4, which acts as a radial escape space, free space, extension space or undercut for the side wall of the capsule 6 and thus also for the anvil 8.
  • the extension 9 is set back somewhat axially towards the bottom of the capsule 6, so that a stop 10 for the front free end of the cylindrical side wall of the capsule 6 is formed between the extension 9 and the top of the ignition bell 4.
  • the stop 10 serves as a guide for the free end of the side wall and as a flow protection in the initial phase of the ignition, so that it is ensured that the pressure in the extension 9 is always less than the pressure in the capsule 6 and thus a proper expansion of the side wall is possible.
  • the extension 9 extends over almost half the axial length of the side wall of the capsule 6.
  • Fig. 5 shows in section and in plan view a known primer.
  • the primer is identical to that shown in FIG. 3.
  • the openings 13 in the anvil 8 can be seen, through which the ignition clouds reach the ignition channels 11 (see FIG. 3).
  • FIG. 4 is a longitudinal section of the rear end of a cartridge case according to the invention after ignition of the primer shown.
  • a firing pin 5 has pressed the capsule bottom of the capsule 6 and remains in this position in the case of a rigid, firmly connected firing pin 5. This is the case in unlocked, mass-locked weapons.
  • the ignition charge 2 arranged between the capsule bottom and the anvil 8 was ignited by the impact of the firing pin 5.
  • the deformation of the capsule base by the firing pin 5 causes the free end of the side wall of the capsule 6 to be pulled from the top of the ignition bell 4 or the stop 10 in the direction of the capsule base. The end can thus move into extension 9.
  • the anvil 8, which is severely deformed by the firing pin 5 or the capsule base, can thereby expand radially, as a result of which its height is reduced in the longitudinal direction and its region opposite the firing pin 5 can, so to speak, move forward.
  • In the capsule base in the area of reference number 7 ', there are no such high loads that would lead to a breakage of the capsule base. This ensures gas tightness in the direction of the weapon breech.
  • pressure peaks of up to approximately 2,000 bar occur with pollutant-free and gas-rich ignition charges, while pressure peaks of up to approximately 1,000 bar occur with pollutant-containing ignition charges.

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Air Bags (AREA)
  • Furnace Charging Or Discharging (AREA)
  • Portable Nailing Machines And Staplers (AREA)
EP94118834A 1993-12-01 1994-11-30 Douille pour cartouche Expired - Lifetime EP0656522B1 (fr)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
DE4340998 1993-12-01
DE4340998 1993-12-01
DE4341002 1993-12-02
DE4341002A DE4341002A1 (de) 1993-12-01 1993-12-02 Patronenhülse

Publications (2)

Publication Number Publication Date
EP0656522A1 true EP0656522A1 (fr) 1995-06-07
EP0656522B1 EP0656522B1 (fr) 2000-03-01

Family

ID=25931695

Family Applications (1)

Application Number Title Priority Date Filing Date
EP94118834A Expired - Lifetime EP0656522B1 (fr) 1993-12-01 1994-11-30 Douille pour cartouche

Country Status (3)

Country Link
US (1) US5481978A (fr)
EP (1) EP0656522B1 (fr)
AT (1) ATE190132T1 (fr)

Families Citing this family (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP3989563B2 (ja) * 1995-09-22 2007-10-10 ダイセル化学工業株式会社 エアバッグ用ガス発生器
AU2574899A (en) * 1998-02-05 1999-08-23 Olin Corporation Cartridge case
US6959647B2 (en) * 1999-10-25 2005-11-01 Mark A. Wistrom Cartridge for a firearm
US6367389B1 (en) * 1999-10-25 2002-04-09 Mark A. Westrom Cartridge for a firearm
US6360666B1 (en) * 2000-06-06 2002-03-26 Alliant Techsystems Inc. Alignment fixture
US7086336B2 (en) * 2000-09-28 2006-08-08 Superior Ballistics, Inc. Firearm cartridge and case-less chamber
US7210260B1 (en) 2000-09-28 2007-05-01 Robert B. Smalley, Jr. Firearm cartridge and case-less chamber
US7546805B2 (en) * 2001-07-17 2009-06-16 Schlumberger Technology Corporation Detonator
US7165496B2 (en) * 2003-11-06 2007-01-23 Reynolds S Paul Piston head cartridge for a firearm
US7581344B2 (en) * 2004-12-22 2009-09-01 Armalite, Inc. Weapon extractor and cartridge
US7841279B2 (en) * 2006-05-24 2010-11-30 Reynolds George L Delayed extraction and a firearm cartridge case
US8424646B2 (en) * 2006-07-10 2013-04-23 United Technologies Corporation Interruption tolerant lubrication system
US9267772B2 (en) * 2012-06-27 2016-02-23 Aai Corporation Ballistic sealing, component retention, and projectile launch control for an ammunition cartridge assembly
US20170328689A1 (en) * 2016-05-11 2017-11-16 U.S. Government As Represented By The Secretary Of The Army Lightweight Cartridge Case
US10976144B1 (en) 2018-03-05 2021-04-13 Vista Outdoor Operations Llc High pressure rifle cartridge with primer

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE73301C (de) * O. BÖKLEN in Lauffen a. Neckar Patronenhülse mit nach vorn erweiterter Zündhütchenkammer
US3306203A (en) * 1960-04-27 1967-02-28 Schaadt Franz Threaded percussion primer
EP0461095A1 (fr) * 1990-06-06 1991-12-11 Bofors AB Améliorations relatives aux amorces pour charges propulsives

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US431601A (en) * 1890-07-08 Wilhelm lorenz
US4173186A (en) * 1960-07-07 1979-11-06 The United States Of America As Represented By The Secretary Of The Army Ammunition

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE73301C (de) * O. BÖKLEN in Lauffen a. Neckar Patronenhülse mit nach vorn erweiterter Zündhütchenkammer
US3306203A (en) * 1960-04-27 1967-02-28 Schaadt Franz Threaded percussion primer
EP0461095A1 (fr) * 1990-06-06 1991-12-11 Bofors AB Améliorations relatives aux amorces pour charges propulsives

Also Published As

Publication number Publication date
US5481978A (en) 1996-01-09
ATE190132T1 (de) 2000-03-15
EP0656522B1 (fr) 2000-03-01

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