US3899974A - Electric propulsive charge igniter - Google Patents

Electric propulsive charge igniter Download PDF

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Publication number
US3899974A
US3899974A US384389A US38438973A US3899974A US 3899974 A US3899974 A US 3899974A US 384389 A US384389 A US 384389A US 38438973 A US38438973 A US 38438973A US 3899974 A US3899974 A US 3899974A
Authority
US
United States
Prior art keywords
shoulder
disc
primer
chamber
boss
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
US384389A
Other languages
English (en)
Inventor
Hans-Dieter Harnau
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.)
Rheinmetall Industrie AG
Original Assignee
Rheinmetall GmbH
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 Rheinmetall GmbH filed Critical Rheinmetall GmbH
Application granted granted Critical
Publication of US3899974A publication Critical patent/US3899974A/en
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
    • F42C—AMMUNITION FUZES; ARMING OR SAFETY MEANS THEREFOR
    • F42C19/00—Details of fuzes
    • F42C19/08—Primers; Detonators
    • F42C19/12—Primers; Detonators electric

Definitions

  • An electric propulsive charge igniter comprising a primer body having a first shoulder.
  • the primer body has a central bottom opening and an outer thread and is adapted to be screwed into a cartridge.
  • the primer body has further a continuous axial opening provided with shoulders.
  • a central contact is insulated from the primer body and combined with its ignition piece.
  • a steel supporting annular disk and a central contact has a narrow shoulder and is associated with the steel supporting annular disk. The latter has a wide shoulder.
  • the narrow shoulder is taken up by the wide shoulder.
  • the supporting annular shoulder rests via its entire shoulder width against the shoulder of the primer body, and the primer body has a sleeve-like extension, passing through the central bottom opening up to the vicinity of the bottom guide for the central contact.
  • the present invention relates to an electric propulsive charge igniter consisting of a primer body which is adapted to be screwed into the bottom of the cartridge and has a continuous axial opening provided with shoulders. In the opening there are arranged in succession, starting from the bottom, a central contact, which is insulated from the primer body and combined with an ignition piece, the primer composition and a transmission composition.
  • the central contact is a part of the ignition piece, which is combined to form a mounting unit, there is no possibility for any significant change in the central contact.
  • the bore within the breechblock, which receives the movable firing pin cannot be arbitrarily narrowed, so that narrow limits are established in this case also with respect to the structural possibilities.
  • an electric propulsive charge igniter which is characterized by an extremely flat construction, which makes possible the use of the previously customary central contact and of the breechblock, and which has an internal arrangement self-supporting in such a manner that it withstands maximum gas pressures.
  • a steel annular supporting disk is associated with the central contact in such a manner, that the narrow shoulder of the central contact is taken up by a broad shoulder of the supporting annular disk, the full shoulder width of which rests against a shoulder on the primer body and the sleeve-like extension of which passes through an opening of the primer body up into the vicinity of the bottom of the primer to form a guide for the central contact.
  • the central contact is provided via the supporting annular disk with an insulation from the primer body, which insulation has reinforcing layers serving as a seal.
  • the high gas pressure acting on the inner device of the propulsive charge igniter is taken up via the narrow shoulder of the central contact, both by the wide shoulder of the steel supporting annular disk and by a shoulder on the primer body, which in its turn fully supports the supporting annular disk.
  • the propulsive charge igniter comprises essentially a cylindrical primer body 1, preferably of brass, on which there are provided an outer thread 2 for screwing it into an outer cartridge bottom, a stop shoulder 3 and a wrench surface 4.
  • the primer body 1 On its inside, the primer body 1 has a continuous axial opening with a plurality of shoulders.
  • the inwardly facing shoulder 5 adjacent the bottom 1a of the primer body 1 terminates at a comparatively narrow central bottom opening or bore 6.
  • a steel annular supporting disk 7, whose diameter corresponds approximately to the outside diameter of the shoulder 5 rests on the latter and has the downwardly directed sleevelike extension or boss 7a which extends almost to the bottom or end face of bore 6.
  • the central contact 8 In the interior there is inserted the central contact 8, which terminates flush with end of the sleeve-like extension 7a approximately in the vicinity of the bottom and whose narrow shoulder 8a rests on the wide shoulder or upper face of the supporting annular disk 7.
  • the central contact 8 is, as is known, combined with an ignition piece 9 adjoining the top of which are the primer and transmission compositions.
  • the upper end of the propulsive charge igniter is closed by a moisture-proof covering plate.
  • the outer surfaces of the supporting annular disk 7, which come into contact with the primer body 1, are insulated.
  • the insulation 10 comprises preferably a thin layer of plastic or synthetic material, which has a reinforcing layer 10a of a fiber-reinforced plastic or synthetic material, merely in the region of the transition from the end surface to the lower disk surface, and on the outside on the sleeve-like extension 7a.
  • the breechblock l l of the weapon system requires a bore, serving to receive and advance the electric firing pin 12, which is larger than the diameter of the central contact 8 and practically as large as the central bottom opening 6 of the primer body 1.
  • a breechsided supporting of the internal arrangement is not possible.
  • the gas pressure which builds up in the charge chamber upon the ignition of the cartridge charge and which acts with the same force also rearward on the inner arrangement of the propulsive charge igniter can be distributed from the small surface of the central contact 8 to the large disk surface of the steel supporting annular disk 7, in which connection it has been found by tests that the entire inner arrangement retains its position unchanged upon firing.
  • a primer body formed at one end with an external thread receivable in said cartridge, an external shoulder at the other end forming a stop for said body, and a end face at said other end adapted to rest against said breechblock,
  • said body being formed with an axially extending chamber and with an internal shoulder defining said chamber at said other end, said other end being provided with an axially extending bore terminating at said internal shoulder and said face communicating with said chamber;

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Aiming, Guidance, Guns With A Light Source, Armor, Camouflage, And Targets (AREA)
  • Air Bags (AREA)
  • Portable Nailing Machines And Staplers (AREA)
  • Common Detailed Techniques For Electron Tubes Or Discharge Tubes (AREA)
  • Filling Or Discharging Of Gas Storage Vessels (AREA)
US384389A 1972-08-10 1973-07-31 Electric propulsive charge igniter Expired - Lifetime US3899974A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE2239325A DE2239325C2 (de) 1972-08-10 1972-08-10 Elektrischer Treibladungsanzünder

Publications (1)

Publication Number Publication Date
US3899974A true US3899974A (en) 1975-08-19

Family

ID=5853201

Family Applications (1)

Application Number Title Priority Date Filing Date
US384389A Expired - Lifetime US3899974A (en) 1972-08-10 1973-07-31 Electric propulsive charge igniter

Country Status (7)

Country Link
US (1) US3899974A (enrdf_load_stackoverflow)
JP (1) JPS5652240B2 (enrdf_load_stackoverflow)
AU (1) AU5902173A (enrdf_load_stackoverflow)
BE (1) BE803229A (enrdf_load_stackoverflow)
DE (1) DE2239325C2 (enrdf_load_stackoverflow)
FR (1) FR2197155B1 (enrdf_load_stackoverflow)
GB (1) GB1393656A (enrdf_load_stackoverflow)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20060011090A1 (en) * 2004-04-09 2006-01-19 Pepperball Technologies, Inc., A Delaware Corporation Primer launched projectile systems
US20080017179A1 (en) * 2004-05-12 2008-01-24 Pepperball Technologies, Inc. Compressed Gas Cartridge Puncture Apparatus
US20090071459A1 (en) * 2007-09-18 2009-03-19 Pepperball Technologies, Inc. Systems, methods and apparatus for use in distributing irritant powder
US20090314178A1 (en) * 2008-06-12 2009-12-24 South Joseph T Lightweight cartridge case

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2932921C2 (de) * 1979-08-14 1984-10-31 Buck Chemisch-Technische Werke Gmbh & Co, 8230 Bad Reichenhall Kontaktkopf für aus elektrisch betätigbaren Wurfbechern verschießbare Wurfkörper
SE442674B (sv) * 1984-05-14 1986-01-20 Bofors Ab Anordning vid inbyggnad av eltenddon
DE10213465A1 (de) 2002-03-26 2003-10-16 Rheinmetall W & M Gmbh Patrone

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US372046A (en) * 1887-10-25 Stuart
US520116A (en) * 1894-05-22 William mason
US712826A (en) * 1902-06-09 1902-11-04 Winchester Repeating Arms Co Combined percussion and electric primer.
US2696191A (en) * 1951-10-17 1954-12-07 William E Sheehan Electrically operated primer
US2960032A (en) * 1955-12-13 1960-11-15 Remington Arms Co Inc Electric primer
US3062146A (en) * 1956-03-15 1962-11-06 Olin Mathieson Primer
US3295446A (en) * 1964-03-12 1967-01-03 Rheinmetall Gmbh Electric primer

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US372046A (en) * 1887-10-25 Stuart
US520116A (en) * 1894-05-22 William mason
US712826A (en) * 1902-06-09 1902-11-04 Winchester Repeating Arms Co Combined percussion and electric primer.
US2696191A (en) * 1951-10-17 1954-12-07 William E Sheehan Electrically operated primer
US2960032A (en) * 1955-12-13 1960-11-15 Remington Arms Co Inc Electric primer
US3062146A (en) * 1956-03-15 1962-11-06 Olin Mathieson Primer
US3295446A (en) * 1964-03-12 1967-01-03 Rheinmetall Gmbh Electric primer

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20060011090A1 (en) * 2004-04-09 2006-01-19 Pepperball Technologies, Inc., A Delaware Corporation Primer launched projectile systems
US20080017179A1 (en) * 2004-05-12 2008-01-24 Pepperball Technologies, Inc. Compressed Gas Cartridge Puncture Apparatus
US20090071459A1 (en) * 2007-09-18 2009-03-19 Pepperball Technologies, Inc. Systems, methods and apparatus for use in distributing irritant powder
US7752974B2 (en) 2007-09-18 2010-07-13 Pepperball Technologies, Inc. Systems, methods and apparatus for use in distributing irritant powder
US20090314178A1 (en) * 2008-06-12 2009-12-24 South Joseph T Lightweight cartridge case
US8156870B2 (en) * 2008-06-12 2012-04-17 The United States Of America As Represented By The Secretary Of The Army Lightweight cartridge case

Also Published As

Publication number Publication date
BE803229A (fr) 1973-12-03
DE2239325A1 (de) 1974-02-21
DE2239325C2 (de) 1984-12-20
GB1393656A (en) 1975-05-07
FR2197155B1 (enrdf_load_stackoverflow) 1978-08-11
JPS5652240B2 (enrdf_load_stackoverflow) 1981-12-10
FR2197155A1 (enrdf_load_stackoverflow) 1974-03-22
AU5902173A (en) 1975-02-13
JPS4945600A (enrdf_load_stackoverflow) 1974-05-01

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