US3885500A - Percussion igniter for projectiles and projectile embodying the same - Google Patents

Percussion igniter for projectiles and projectile embodying the same Download PDF

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Publication number
US3885500A
US3885500A US406930A US40693073A US3885500A US 3885500 A US3885500 A US 3885500A US 406930 A US406930 A US 406930A US 40693073 A US40693073 A US 40693073A US 3885500 A US3885500 A US 3885500A
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US
United States
Prior art keywords
igniter
striker
primer
percussion
projectiles
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
US406930A
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English (en)
Inventor
Robert M Bornand
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.)
Individual
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Individual
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Filing date
Publication date
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Application granted granted Critical
Publication of US3885500A publication Critical patent/US3885500A/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
    • F42C—AMMUNITION FUZES; ARMING OR SAFETY MEANS THEREFOR
    • F42C19/00—Details of fuzes
    • F42C19/08—Primers; Detonators
    • F42C19/10—Percussion caps

Definitions

  • the present invention relates to a percussion igniter for igniting the propulsive charge of projectiles.
  • the purpose of the invention is to provide such a percussion igniter, which will be quite simple and capable of ensuring the tightness of the igniting system in both directions, that is to say, capable of preventing the penetration of and the escape of, the high pressure gases.
  • the percussion igniter according to the present invention allows at the same time to ensure in the known way the moisture tightness and through a quite simple means to avoid the escape of gases, whilst lowering the working threshold down to the known limits for the most sensitive of primers.
  • the percussion primer according to this invention is characterized in that the striker, which is located up-stream of the thin walled primer has, in line with the annular bottom of the primer carrier, an annular and concave lower face, which centrally draws out into a coaxial protruding part.
  • the latter may be hollow, solid or even elastic
  • the gas sealing function is carried over to the comparatively light striker located up-stream of the primer, which may be highly sensitive.
  • this percussion igniter may be combined with any chamber, a casing or also be an integral part of a projectile, for instance a finned projectile.
  • FIG. 1 shows a radial section of the components of the percussion igniter in a restor storage position
  • FIG. 2 is similar to FIG. 1, the igniter being shown in ignition position;
  • FIG. 3 is similar to FIGS. 1 and 2, the igniter being shown in post firing position;
  • FIGS. 4, and 6 show radial sections of various applications and embodiments of the igniter according to the invention.
  • an envelope 1 which may be a chamber (FIGS. 1 4), or a casing (FIG. 5), or the corresponding part of a finned projectile (FIG. 6), is screwed or otherwise attached the body 2 of the igniter.
  • the latter is provided with bores defining two annular shoulders 3-4.
  • the primer carrier 5 In the first bore, limited at the bottom by said annular shoulder 3, is fixed the primer carrier 5, housing the primer proper 6, jacketed by a thin wall 7 and an additional charge or primer 8.
  • a washer or disc 9 On the upper edge of said igniter body is located a washer or disc 9, limiting in this way the lower part of the combustion chamber 10, the upper part of which is limited by the corresponding part of the projectile 11.
  • the striker 12 which in the present case consists of a cylindrical body 13, the upper face of which is centrally provided with a protrusion or needle 14 whilst, according to the principal characteristic of the invention, its annular bottom face 15 is con cave.
  • the central part of the said concave annular face 15 is drawn out into a protruding part 16.
  • This part is hollow and has in the example of the FIGS. 1 to 4 a comparatively thin wall; it is solid in the example of FIG. 5, but, in the part which is adjacent to the concave annular face; it has a reduced diameter or a groove 17; in the example of FIG. 6, said protruding part 16 is a helicoidal spring firmly attached to the central part of said concave inferior face of the striker.
  • the free end of the protruding part 16 is slightly sunk with respect to the lower face 18 of igniter body 2.
  • the tightness in preventing combustion gases from escaping after firing is ensured by the fact that as the striker 12 is violently loaded by the gases under pressure, its concave annular face 15 is deformed whilst being forcibly seated on said shoulder 4 (FIG. 3), thereby ensuring a perfect tightness, preventing any passage of gas under pressure.
  • the drive of the striker 12 towards the primer 6 may be obtained by an infinite variety of means, generally determined by the kind of projectile concerned and also by the percussion mechanism proper, which are not an internal part'of the invention and are quite schematically illustrated by the percussion component 19.
  • the invention relates both to the percussion igniter device and to any projectile associated therewith.
  • a percussion igniter for projectiles comprising an igniter body ,'a primer within said igniter body, a striker disposed in said igniter body for movement toward and away from said primer, said body having an annular internal shoulder thereon that surrounds an opening through the bottom of said primer to provide access to said striker, said body and primer and striker and shoulder being coaxial; the improvement in which said striker has a concave surface confronting said annular shoulder whereby upon combustion of said primer, said striker is forced against said annular shoulder to flatten out said concave surface against said anbase to promote collapse of said projection upon impact.
  • a projectile having an explosive charge therein and a percussion igniter therefor as claimed in claim 1.

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Portable Nailing Machines And Staplers (AREA)
  • Air Bags (AREA)
  • Aiming, Guidance, Guns With A Light Source, Armor, Camouflage, And Targets (AREA)
  • Elimination Of Static Electricity (AREA)
US406930A 1973-10-05 1973-10-16 Percussion igniter for projectiles and projectile embodying the same Expired - Lifetime US3885500A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CH1424173A CH581307A5 (sv) 1973-10-05 1973-10-05

Publications (1)

Publication Number Publication Date
US3885500A true US3885500A (en) 1975-05-27

Family

ID=4399166

Family Applications (1)

Application Number Title Priority Date Filing Date
US406930A Expired - Lifetime US3885500A (en) 1973-10-05 1973-10-16 Percussion igniter for projectiles and projectile embodying the same

Country Status (17)

Country Link
US (1) US3885500A (sv)
AT (1) AT333625B (sv)
BE (1) BE806877A (sv)
CA (1) CA1019640A (sv)
CH (1) CH581307A5 (sv)
DE (1) DE2446832C2 (sv)
DK (1) DK140961B (sv)
EG (1) EG13285A (sv)
ES (1) ES427645A1 (sv)
FR (1) FR2246841B1 (sv)
GB (1) GB1412577A (sv)
IL (1) IL44938A (sv)
IT (1) IT1014255B (sv)
NL (1) NL171838C (sv)
NO (1) NO137919C (sv)
SE (1) SE417369B (sv)
ZA (1) ZA741793B (sv)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4027592A (en) * 1975-02-06 1977-06-07 Dynamit Nobel Aktiengesellschaft Propellant charge igniter with striker element
US5493975A (en) * 1995-02-21 1996-02-27 Burndy Corporation Cartridge for a power driven tool
US20100258023A1 (en) * 2006-05-24 2010-10-14 Reynolds George L Delayed extraction and a firearm cartridge case

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3608260C2 (de) * 1986-03-12 1996-05-09 Heckler & Koch Gmbh Drehbarer Schlagbolzen bei einer Feuerwaffe
DE9103660U1 (de) * 1991-03-25 1991-05-29 Trw Repa Gmbh, 73553 Alfdorf Schlagzünder für einen pyrotechnischen, mit einem Zündhütchen versehenen Gasgenerator

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US624145A (en) * 1899-05-02 Automatic firearm
US2415803A (en) * 1944-12-23 1947-02-18 Abell Royal Allen Cartridge
US2421266A (en) * 1937-11-06 1947-05-27 Mefina Sa Fuse for ordnance projectiles or bombs
US2926607A (en) * 1957-05-28 1960-03-01 Jr Hollis L Muller Hermetically sealed explosive cartridge
US3114290A (en) * 1962-10-12 1963-12-17 Earle M Harvey Breech sealing means for automatic firearms adapted to fire caseless ammunition
US3396658A (en) * 1966-06-02 1968-08-13 Army Usa Small arms cartridge

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1087219A (en) * 1909-10-02 1914-02-17 Vickers Ltd Firing-gear of breech-loading ordnance.
US2480100A (en) * 1947-07-02 1949-08-23 Weiss Saul Obturating firing pin
US3577826A (en) * 1969-07-22 1971-05-04 Gen Electric Bellows sealed firing pin

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US624145A (en) * 1899-05-02 Automatic firearm
US2421266A (en) * 1937-11-06 1947-05-27 Mefina Sa Fuse for ordnance projectiles or bombs
US2415803A (en) * 1944-12-23 1947-02-18 Abell Royal Allen Cartridge
US2926607A (en) * 1957-05-28 1960-03-01 Jr Hollis L Muller Hermetically sealed explosive cartridge
US3114290A (en) * 1962-10-12 1963-12-17 Earle M Harvey Breech sealing means for automatic firearms adapted to fire caseless ammunition
US3396658A (en) * 1966-06-02 1968-08-13 Army Usa Small arms cartridge

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4027592A (en) * 1975-02-06 1977-06-07 Dynamit Nobel Aktiengesellschaft Propellant charge igniter with striker element
US5493975A (en) * 1995-02-21 1996-02-27 Burndy Corporation Cartridge for a power driven tool
US20100258023A1 (en) * 2006-05-24 2010-10-14 Reynolds George L Delayed extraction and a firearm cartridge case
US7841279B2 (en) * 2006-05-24 2010-11-30 Reynolds George L Delayed extraction and a firearm cartridge case

Also Published As

Publication number Publication date
CA1019640A (en) 1977-10-25
NL7412613A (nl) 1975-04-08
NO137919B (no) 1978-02-06
SE417369B (sv) 1981-03-09
IL44938A (en) 1978-06-15
SE7410840L (sv) 1975-04-07
NO137919C (no) 1978-05-16
EG13285A (en) 1981-12-31
NL171838C (nl) 1983-05-16
ATA795174A (de) 1976-03-15
BE806877A (fr) 1974-03-01
AT333625B (de) 1976-12-10
IL44938A0 (en) 1974-09-10
FR2246841B1 (sv) 1978-06-02
DK140961C (sv) 1980-05-27
DK140961B (da) 1979-12-10
ZA741793B (en) 1975-03-26
NO743498L (sv) 1975-05-05
NL171838B (nl) 1982-12-16
DK506174A (sv) 1975-06-02
DE2446832C2 (de) 1981-11-26
ES427645A1 (es) 1976-10-01
IT1014255B (it) 1977-04-20
CH581307A5 (sv) 1976-10-29
FR2246841A1 (sv) 1975-05-02
DE2446832A1 (de) 1975-04-10
GB1412577A (en) 1975-11-05

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