US3777664A - Anvil for percussion primer - Google Patents

Anvil for percussion primer Download PDF

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Publication number
US3777664A
US3777664A US00111275A US3777664DA US3777664A US 3777664 A US3777664 A US 3777664A US 00111275 A US00111275 A US 00111275A US 3777664D A US3777664D A US 3777664DA US 3777664 A US3777664 A US 3777664A
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US
United States
Prior art keywords
anvil
end surface
annular end
frustrum
primer
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
US00111275A
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English (en)
Inventor
H Gawlick
H Bendler
E Jensen
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
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Dynamit Nobel AG
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Filing date
Publication date
Application filed by Dynamit Nobel AG filed Critical Dynamit Nobel AG
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Publication of US3777664A publication Critical patent/US3777664A/en
Anticipated expiration legal-status Critical
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    • 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

  • ANVIL FOR PERCUSSION PRIMER Inventors: Heinz Gawlick, Furth/Bay; Hellmut Bendler, Er Weg-Spardorf; Ernst Jensen, Furth/Bay, all of Germany Dynamit Nobel AG, Troisdorf, Germany Filed: Feb. 1, 1971 Assignee:
  • the anvil as an annular disk which, as seen in cross section, tapers approximately coincally and has a cylindrical outer surface in the zone of one of its end 'faces, while it passes over into an annular surface at right angles to the axis thereof in the zone of the other of its end faces.
  • the annular disk has at least two recesses or cutouts at the periphery thereof.
  • these recesses are disposed uniformly along the periphery, so that a uniform ignition effect is obtained as seen along the periphery.
  • This effect can be essentially enhanced by providing in accordance with a further feature of the present invention the end face which is at right angles to the axis with projections and/or depressions. These can be formed, forexample, as annular and/or radially extending depressions or raised portions. However, a very finely roughened area is also suitable.
  • FIG. 1 is a cross-sectional axial view of a primer with a conventional anvil having a central rounded tip;
  • FIG. 2 is a cross-sectional axial view of a primer with the anvil in accordance with the present invention.
  • FIGS. 3a and 3b are bottom views of two different embodiments of the anvil of FIG. 2.
  • primer composition 2 with a central depression 3 is accommodated in a cup 1.
  • the anvil 4 is held with its outer annular surface 5 in the cup 1 by a clamping connection and is disposed with its central rounded tip 6 directly above the primer composition 2. Due to the increasing height of the primer composition 2, the consequence of an increased deviation from the centered arrangement is perforce a lower sensitivity of the primer, since the anvil 4 impinges with its tip 6 always on the primer composition 2 only at a point.
  • the design of the anvil 4 in accordance with the present invention as shown in FIG. 2 ensures a sufficiently certain ignition by the relatively large annular surface 7 even when the striker pin (not shown) impinges on the cup 1 eccentrically.
  • a particular advantage of the anvil 4, which is again held in the cup 1 by clamping action, is its extremely small structural height making it possible to employ the arrangement with great versatility.
  • the shape imparted to the primer composition 2 so as to be adapted to the configuration of the anvil 4 is selfevident in this connection.
  • the anvil is of one piece construction and includes a disk portion 11 having a cylindrical outer surface and a frustrum portion of a substantially conical member 12 extending therefrom with the disk and frustrum portion defining an axial aperture 3 extending completely therethrough.
  • the effectiveness of the anvil 4 can be considerably increased by roughening the annular surface 7, that is providing same with raised portions or depressions such as, for example, in the form of the radial grooves 8 of FIG. 3a or the annular grooves 9 and the radial grooves of FIG. 3b.
  • the priming effect is, moreover, quite considerably enhanced by recesses or cut-outs 10 at the periphery of the annular surface.
  • anvil will, of course, be selected in adaptation to the respective dimensions of the primer or the respective situation.
  • an annular disk is selected having an inside diameter of, at most, 1.5 mm., and in case of a striker pin diameter of about 3 mm., an annular disk is chosen having an inside diameter of no more than about 2.2 mm.
  • a one piece longitudinally extending anvil for percussion primers comprising a disk portion with a cylindrical outer surface and a frustrum portion of a substantially conical member extending in the longitudinal direction from said disk portion, said disk and frustrum portions defining an axial aperture extending completely therethrough, said frustrum portion and the aperture defining an annular end surface of said anvil, said disk portion defining outer longitudinally extending apertures at at least two places in the outer cylindrical surface thereof.
  • annular end surface is at right angles to the axis and is provided with projections or depressions.
  • the percussion primer includes a cup having a primer charge therein, and the anvil being arranged in the cup with the annular end surface thereof directly facing the primer charge.
  • a one piece longitudinally extending anvil for percussion primers comprising a disk portion with a cylindrical outer surface and a frustrum portion of a substantially conical member extending in the longitudinal direction from said disk portion, said disk and frustrum portions defining an axial aperture extending completely therethrough, said frustrum portion and the aperture defining an annular end surface, said annular end surface being arranged directly facing a primer charge and having an outer diameter which is larger than the diameter of a striker pin for the percussion primer and having an inner diameter which is smaller than the diameter of the striker pin.
  • Anvil according to claim 9 wherein said disk portion defines outer longitudinally extending apertures at at least two places in the outer cylindrical surface thereof.

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Portable Nailing Machines And Staplers (AREA)
  • Insertion Pins And Rivets (AREA)
  • Lining Or Joining Of Plastics Or The Like (AREA)
US00111275A 1970-01-31 1971-02-01 Anvil for percussion primer Expired - Lifetime US3777664A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19702004506 DE2004506A1 (de) 1970-01-31 1970-01-31 Amboß fur Schlagzündhütchen

Publications (1)

Publication Number Publication Date
US3777664A true US3777664A (en) 1973-12-11

Family

ID=5761125

Family Applications (1)

Application Number Title Priority Date Filing Date
US00111275A Expired - Lifetime US3777664A (en) 1970-01-31 1971-02-01 Anvil for percussion primer

Country Status (5)

Country Link
US (1) US3777664A (enExample)
BE (1) BE762119A (enExample)
DE (1) DE2004506A1 (enExample)
FR (1) FR2077165A5 (enExample)
GB (1) GB1320465A (enExample)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4029015A (en) * 1975-07-08 1977-06-14 Maurice Lachaussee Priming chamber for cartridges
DE2927826A1 (de) * 1978-07-12 1980-01-24 France Etat Brennbarer sicherheitszuender mit selektivem anschlag fuer munition ohne huelse oder mit brennbarer huelse
US4532866A (en) * 1981-11-19 1985-08-06 L'etat Francais Combustible safety primer of selective percussion for case-less ammunition or ammunition with combustible case
US9857151B2 (en) * 2013-10-21 2018-01-02 General Dynamics Ordnance and Tactical Systems—Canada, Inc. Ring fire primer
RU2834914C1 (ru) * 2024-03-06 2025-02-17 Российская Федерация, от имени которой выступает Министерство обороны Российской Федерации Гальваноударная втулка
US20250164224A1 (en) * 2023-11-22 2025-05-22 Howard D. Kent Cartridge primer and method of manufacture

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2021498A (en) * 1934-03-16 1935-11-19 Remington Arms Co Inc Ammunition
US2868128A (en) * 1946-03-19 1959-01-13 Thomas D Ramsey Hermetically sealed primer
US3352240A (en) * 1965-11-30 1967-11-14 Remington Arms Co Inc Primer

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2021498A (en) * 1934-03-16 1935-11-19 Remington Arms Co Inc Ammunition
US2868128A (en) * 1946-03-19 1959-01-13 Thomas D Ramsey Hermetically sealed primer
US3352240A (en) * 1965-11-30 1967-11-14 Remington Arms Co Inc Primer

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4029015A (en) * 1975-07-08 1977-06-14 Maurice Lachaussee Priming chamber for cartridges
DE2927826A1 (de) * 1978-07-12 1980-01-24 France Etat Brennbarer sicherheitszuender mit selektivem anschlag fuer munition ohne huelse oder mit brennbarer huelse
US4532866A (en) * 1981-11-19 1985-08-06 L'etat Francais Combustible safety primer of selective percussion for case-less ammunition or ammunition with combustible case
US9857151B2 (en) * 2013-10-21 2018-01-02 General Dynamics Ordnance and Tactical Systems—Canada, Inc. Ring fire primer
US20250164224A1 (en) * 2023-11-22 2025-05-22 Howard D. Kent Cartridge primer and method of manufacture
WO2025111115A1 (en) * 2023-11-22 2025-05-30 Kent Howard D Cartridge primer and method of manufacture
US12474148B2 (en) * 2023-11-22 2025-11-18 Howard D. Kent Cartridge primer and method of manufacture
RU2834914C1 (ru) * 2024-03-06 2025-02-17 Российская Федерация, от имени которой выступает Министерство обороны Российской Федерации Гальваноударная втулка

Also Published As

Publication number Publication date
DE2004506A1 (de) 1971-08-05
GB1320465A (en) 1973-06-13
BE762119A (fr) 1971-07-01
FR2077165A5 (enExample) 1971-10-15

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