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US3719148A - Primer for electric and percussion fuses for cartridge ammunition - Google Patents

Primer for electric and percussion fuses for cartridge ammunition Download PDF

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Publication number
US3719148A
US3719148A US00053774A US3719148DA US3719148A US 3719148 A US3719148 A US 3719148A US 00053774 A US00053774 A US 00053774A US 3719148D A US3719148D A US 3719148DA US 3719148 A US3719148 A US 3719148A
Authority
US
United States
Prior art keywords
primer
thrust ring
charge
metallic
gap
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
US00053774A
Other languages
English (en)
Inventor
H Gawlick
H Bendler
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 AG
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 DE19691935376 external-priority patent/DE1935376C/de
Application filed by Dynamit Nobel AG filed Critical Dynamit Nobel AG
Application granted granted Critical
Publication of US3719148A publication Critical patent/US3719148A/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
    • F42C19/0815—Intermediate ignition capsules, i.e. self-contained primary pyrotechnic module transmitting the initial firing signal to the secondary explosive, e.g. using electric, radio frequency, optical or percussion signals to the secondary explosive
    • 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
    • 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
    • F42C19/14—Primers; Detonators electric operable also in the percussion mode

Definitions

  • the above-mentioned conventional electric priming means contain a perforated metallic shell and a pole piece disposed to be insulated with respect to this shell.
  • This pole piece is held by a thrust ring, said ring being firmly connected to the shell by flanging.
  • the thrust ring and the pole piece are insulated with respect to each other.
  • Such an arrangement has proved well suitable for electric ignition.
  • this arrangement is completely unsatisfactory for percussion priming. In this situation the firing pin strikes the pole piece inwardly, in which case gas can escape toward the rear between the shell and the pole piece. Since, in the interest of stability (ruggedness), the pole piece must be fashioned to be very thick, the percussion sensitivity of the primer means is reduced in an undesirable manner.
  • An object of the present invention is to avoid the prior art disadvantages in providing a primer for electric and percussion fuses for cartridge ammunition.
  • Another object of the present invention is to provide a primer for electric and percussion priming suitable for infantry cartridge caliber up to cartridge ammunition for automatic firearms of a larger caliber, and being constructed in such a manner that safety is ensured up to an acceleration of 500,000 gs.
  • a further object of the present invention is to provide a primer for both electric and percussion priming which eliminates flashing and is sufficiently shockproof to make it suitable for automatic fire-arms.
  • an improved primer for electric and percussion fuses for cartridge ammunition may be obtained by providing that the case of the primer is composed of a metallic capsule with a closed bottom, as the lead electrode to a gap (high-tension) charge, and that there is arranged in the interior of the primer a thrust ring, completely insulated with respect to the capsule, as the second lead electrode for the gap charge and as the current connection'to the propellant charge case (cartridge).
  • the thrust ring is held by a flange of the capsule resting on an insulating ring.
  • an anvil is arranged in the thrust ring. This anvil can either be joined to the thrust ring by solid flanging, or can be threadedly inserted therein by means of a thread.
  • FIG. 1 shows a sectional view of a conventional primer
  • FIG. 2 shows the effects on the primer of FIG. 1 after a percussion priming (detonation);
  • FIG. 3 shows a sectional view of the primer of the present invention
  • FIG. 4 shows a sectional view of a primer inserted in the propellant charge case
  • FIG. 5 shows the disposition of the anvil in the thrust ring by means of a flange
  • FIG. 6 shows the mounting of the anvil in the thrust ring by means of a thread.
  • the conventional priming element in FIG. 1 exhibits a metallic shell 1 provided with a bore and a pole piece 3 arranged to be insulated with respect to this shell by means of an insulating cup 2.
  • This pole piece is held by a thrust ring 4 firmly connected to the shell 1 by a flange 5.
  • the thrust ring 4 and the pole piece 3 are likewise insulated from each other by means of a disk 6.
  • the thickness of the disk 6 provides the gap required for the electric ignition.
  • the primer charge 7 is provided in this system in compressed form and is protected by means of a lid varnished on the outside.
  • the primer according to the present invention is fashioned so that a thrust ring is disposed in a metallic capsule 9, said ring being insulated with respect to the capsule, that is, with respect to the bottom thereof, by means of an insulating ring 11, with respect to the sidewall by means of cylindrical insulation 12, and with respect to the flange 13 by means of an insulating ring 14.
  • the capsule is fixedly connected with the thrust ring, the flange resting on the insulating ring 14.
  • the capsule 9 and the thrust ring 10 represent the two lead (feeder) electrodes to a gap charge 15.
  • a primer charge 16 is disposed on the gap charge by pressing.
  • This primer charge is provided with a hemispherical (cap-shaped) element into which the anvil 17 extends.
  • the primer charge proper is covered with a foil 18 of metal or paper.
  • the electrically conductive gap charge 15 consists predominantly of lead trinitroresorcinate or a similar inflammable (ignitable) component, containing as the electrically conductive means an effective amount of graphite or carbon black.
  • a proportion of about 2-2 percent of tetrazene as well as a friction agent, consisting of powdered glass or calcium silicide or antimony sulfide, are admixed to the charge.
  • the primer charge 16 contains a pyrotechnical mixture required for igniting the powder. It can comprise for example, a mixture of lead dioxide, calcium silicide, and barium nitrate. However, it is also possible to select the electric and percussion-sensitive charge 16 with respect to its composition in such a manner that it is already able to ignite a propellant.
  • the anvil 17 and the thrust ring 10 together are disposed in the inside bottom of the propellant charge case 19.
  • the capsule 9 is electrically separated by an insulation 20.
  • the bottom of the capsule 9 is bent toward the anvil 17, and the interposed gap charge 15 is ignited.
  • the flash of the gap charge 15 and the primer charge 16 escapes through the apertures 21 of the anvil 17 into the flash hole 22.
  • FIGS. 5 and 6 show two ways of mounting the anvil 17 in the thrust ring 10, in the first instance by means of a flange 23 and in the second instance by means of a thread 24.
  • a primer for electric and percussion priming for use in accordance with the spark-gap principle which comprises a metallic capsule provided with a closed bottom, an electrically conductive thrust ring disposed inside of the metallic capsule, insulating means for completely insulating the thrust ring from the metallic capsule, and a gap charge provided inside the thrust ring and adjacent the closed bottom of the metallic capsule, the metallic capsule and the thrust ring being arranged for connection with electrical means such that the metallic capsule acts as a first lead electrode to the gap charge and the thrust ring acts as a second lead electrode for the gap charge.
  • the primer of claim 1 further comprising a metallic propellant charge case containing a propellant charge and having said metallic capsule disposed therein, further insulating means for insulating said metallic capsule from the metallic case, and said thrust ring providing the electrical connection to the propellant charge case.
  • a primer for electric and percussion priming for use in accordance with the spark-gap principle which comprises a shell-like metallic capsule provided with a closed bottom and a flanged open end, an electrically conductive thrust ring annularly disposed inside of the metallic capsule and adapted to be held in position by said flanged portions, insulating means for completely insulating said thrust ring from the bottom, sidewalls and flange portion of the metallic capsule, a gap charge provided inside the thrust ring and adjacent the closed bottom of the metallic capsule, a primer charge provided inside the thrust ring and adjacent the gap charge and an anvil disposed inside the thrust ring as an abutment for the percussion priming means, said metallic capsule and said thrust ring being arranged for connection with electrical means such that said metallic capsule and said thrust ring serve as the two lead electrodes to the gap charge.
  • the gap charge contains lead trinitroresorcinate containing as an electrically conductive means an effective amount of graphite or carbon black.
  • the primer of claim 10 wherein said gap charge further contains about 2 to 3 percent tetrazene, and a friction agent selected from the group consisting of powdered glass, calcium silicide or antimony sulfide.

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Air Bags (AREA)
  • Paints Or Removers (AREA)
  • Coating Apparatus (AREA)
US00053774A 1969-07-11 1970-07-10 Primer for electric and percussion fuses for cartridge ammunition Expired - Lifetime US3719148A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19691935376 DE1935376C (de) 1969-07-11 Kombiniertes Zündhütchen

Publications (1)

Publication Number Publication Date
US3719148A true US3719148A (en) 1973-03-06

Family

ID=5739587

Family Applications (1)

Application Number Title Priority Date Filing Date
US00053774A Expired - Lifetime US3719148A (en) 1969-07-11 1970-07-10 Primer for electric and percussion fuses for cartridge ammunition

Country Status (5)

Country Link
US (1) US3719148A (da)
BE (1) BE753312A (da)
FR (1) FR2051694B1 (da)
GB (1) GB1314203A (da)
NO (1) NO126817B (da)

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3844216A (en) * 1972-06-30 1974-10-29 F Jakobs Detonator cap assembly for firearm cartridges
US4014264A (en) * 1974-09-13 1977-03-29 Dynamit Nobel Aktiengesellschaft Combined igniter cap
US4335653A (en) * 1979-09-03 1982-06-22 Aktiebolaget Bofors Electric igniter with conductive bodies and thin connector
US5646367A (en) * 1996-03-01 1997-07-08 Remington Arms Company, Inc. Conductive primer mix
US20050183805A1 (en) * 2004-01-23 2005-08-25 Pile Donald A. Priming mixtures for small arms
US10215545B2 (en) * 2013-08-05 2019-02-26 Ruag Ammotec Gmbh Electromechanical primer cap
US10976144B1 (en) 2018-03-05 2021-04-13 Vista Outdoor Operations Llc High pressure rifle cartridge with primer

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4527481A (en) * 1983-04-08 1985-07-09 Ici Americas Inc. Impact sensitive high temperature detonator

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US601902A (en) * 1898-04-05 Frederick weaver oliver
US1034160A (en) * 1912-04-22 1912-07-30 Winchester Repeating Arms Co Electric primer.
GB805118A (en) * 1957-04-20 1958-11-26 Dynamit Nobel Ag Improvements in or relating to electric primers for ammunition
US3090310A (en) * 1960-05-04 1963-05-21 George W Peet Conductive explosive primer mixture and device
FR1534591A (fr) * 1966-08-27 1968-07-26 Dynamit Nobel Ag Dispositif de protection anti-choc pour amorces

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US601902A (en) * 1898-04-05 Frederick weaver oliver
US1034160A (en) * 1912-04-22 1912-07-30 Winchester Repeating Arms Co Electric primer.
GB805118A (en) * 1957-04-20 1958-11-26 Dynamit Nobel Ag Improvements in or relating to electric primers for ammunition
US3090310A (en) * 1960-05-04 1963-05-21 George W Peet Conductive explosive primer mixture and device
FR1534591A (fr) * 1966-08-27 1968-07-26 Dynamit Nobel Ag Dispositif de protection anti-choc pour amorces

Cited By (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3844216A (en) * 1972-06-30 1974-10-29 F Jakobs Detonator cap assembly for firearm cartridges
US4014264A (en) * 1974-09-13 1977-03-29 Dynamit Nobel Aktiengesellschaft Combined igniter cap
US4335653A (en) * 1979-09-03 1982-06-22 Aktiebolaget Bofors Electric igniter with conductive bodies and thin connector
US5646367A (en) * 1996-03-01 1997-07-08 Remington Arms Company, Inc. Conductive primer mix
EP1040088A1 (en) * 1996-03-01 2000-10-04 Remington Arms Company, Inc. Conductive primer mix
EP1040088A4 (en) * 1996-03-01 2000-11-08 Remington Arms Co Inc CONDUCTIVE MIXTURE FOR PRIMERS
US20050183805A1 (en) * 2004-01-23 2005-08-25 Pile Donald A. Priming mixtures for small arms
US20050189053A1 (en) * 2004-01-23 2005-09-01 Pile Donald A. Bismuth oxide primer composition
US8128766B2 (en) 2004-01-23 2012-03-06 Ra Brands, L.L.C. Bismuth oxide primer composition
US8597445B2 (en) 2004-01-23 2013-12-03 Ra Brands, L.L.C. Bismuth oxide primer composition
US8784583B2 (en) 2004-01-23 2014-07-22 Ra Brands, L.L.C. Priming mixtures for small arms
US10215545B2 (en) * 2013-08-05 2019-02-26 Ruag Ammotec Gmbh Electromechanical primer cap
US10976144B1 (en) 2018-03-05 2021-04-13 Vista Outdoor Operations Llc High pressure rifle cartridge with primer
US11609077B2 (en) 2018-03-05 2023-03-21 Vista Outdoor Operations Llc High pressure rifle cartridge with primer
US12135198B2 (en) 2018-03-05 2024-11-05 Federal Cartridge Company High pressure rifle cartridge with primer

Also Published As

Publication number Publication date
GB1314203A (en) 1973-04-18
BE753312A (fr) 1970-12-16
DE1935376A1 (de) 1971-02-11
FR2051694B1 (da) 1973-02-02
FR2051694A1 (da) 1971-04-09
NO126817B (da) 1973-03-26

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