US3169483A - Percussion cap - Google Patents

Percussion cap Download PDF

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Publication number
US3169483A
US3169483A US123400A US12340061A US3169483A US 3169483 A US3169483 A US 3169483A US 123400 A US123400 A US 123400A US 12340061 A US12340061 A US 12340061A US 3169483 A US3169483 A US 3169483A
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US
United States
Prior art keywords
recess
body member
cap
percussion
shoulder
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
US123400A
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English (en)
Inventor
Gawlick Heinz
Bendler Helmut
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
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Filing date
Publication date
Application filed by Dynamit Nobel AG filed Critical Dynamit Nobel AG
Application granted granted Critical
Publication of US3169483A publication Critical patent/US3169483A/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
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F42—AMMUNITION; BLASTING
    • F42B—EXPLOSIVE CHARGES, e.g. FOR BLASTING, FIREWORKS, AMMUNITION
    • F42B3/00—Blasting cartridges, i.e. case and explosive
    • F42B3/10—Initiators therefor
    • F42B3/16—Pyrotechnic delay initiators

Definitions

  • PERCUSSION CAP Filed July 1o, 1961 s INV ENTORS HEINZ GA WL /C K HELMUT BENDLER BMW blug-gaga) n@ ATTORN YS 3,169,483 PERCUSSION CAP Heinz Gawlick and Helmut Beudler, both of Furth,
  • the present invention relates to percussion caps, and more particularly to percussion caps for use in percussion priming or ignition of a major charge wherein the body member of the cap has a recess dened therein containing a shoulder portion serving as anvil.
  • Percussion caps for rifle cartridges and revolver cartridges are normally produced with an impact-sensitive detonator material which is ignited by impact upon an anvil within the cartridge.
  • the impact usually takes place at the bottom of the percussion cap which causes the ignition of the detonator material due to the oppositely positioned abutment, i.e. an ambos or anvil, which is positioned within the percussion cap itself or is firmly connected with the cartridge shell or ⁇ sleeve wall.
  • impact percussion caps may also be used for other purposes than in the ignition of cartridges.
  • impact percussion caps may be employed for the ignition of fuses in hand grenades or in artillery projectiles, shells, andthe like.
  • impact percussion caps may serve to ignite a detonator material in the primary fuse of a grenade.
  • anvil percussion caps normally could only be used in practice.
  • the impact energy existing in said foregoing devices such as grenade fuses or hand grenade fuses is essentially less than in a normal weapon cartridge or the like.
  • the sensitivity of an anvil-percussion cap is limited directly in terms of the bottom strength or thickness of the bottom wall of the percussion cap.
  • the conventional construction of percussion caps of this type is not sucient to assure an unobjectionable ignition for the device to be exploded.
  • FIG. l illustrates a longitudinal sectional view of a percusssion cap construction in accordance with the invention
  • FIG. 2 illustrates a similar view of an alternate embodiment of the invention wherein the wall portion remote from the impact end of the cap is closed, and
  • FIG. 3 is a longitudinal sectional View of the percussion cap of FIG. l shown disposed in position in the sleeve of a primer device.
  • a very sensitive percussion cap may be provided which comprises a body member having a recess defined therein which is partially delined intermediate its depth by a shoulder portion provided in the adjacent body member interior surface surrounding the recess.
  • a plate States Patent O "a lg Patented Feb. 16, 1965 ICC means is longitudinally slidably disposed within the recess above and in slightly spaced relation to the shoulder portion, the plate means extending across the recess into covering contact with the adjacent body member interior surface surrounding the recess.
  • a suitable detonator means or explosive charge occupies the part of the recess below the plate means, including that part of the recess located between the plate means and the shoulder portion, slightly spaced therefrom.
  • the part of the recess below the plate means is in open communication with the exterior of the body member by means dening an opening in the body member remote from the plate means.
  • the part of the recess below the plate means is closed oit.
  • the percussion cap may be said to contemplate a construction, including a tubular metal body having an internal transmission shoulder portion defined in the internal wall therewithin, a plate means extending transversely across the internal opening of the tubular body and abuttingly engaging the surrounding interior wall of such body.
  • the plate means is spaced axially a slight distance with respect to the shoulder portion and detonator material occupies the interior space of the tubular body between the plate means and the shoulder portion.
  • both ends of the tubular metal body may be open, in accordance with one embodiment as aforesaid, on the other hand, in accordance with another embodiment of the invention, only the end of the tubular metal body adjacent the plate means is open whereas the end of the tubular body adjacent the detonator means is closed so as to retain the detonator means in sealed condition between the closed end and the plate means.
  • the body means may have a central tubular chamber having one axial portion of smaller cross section in off-set or partial registry with the other axial portion of larger cross section, such that the axial point of registry and transition from the portion of smaller cross section to the portion of larger cross section deiines a shoulder transverse the axis of the chamber.
  • a foil is sealingly disposed in contact with the wall of the chamber transverse the portion of larger cross section at an axial point spaced slightly from the shoulder. Therefore, the portion of smaller cross section and that part of the portion of larger cross section in the slight space between the foil and shoulder adequately and conveniently define a receptacle space for detonator material.
  • an impact percussion cap which may conveniently consist of only one metal element which simultaneously receives the detonator material and serves .as anvil therefor as well.
  • the foil extending across the recess in the single metal element seals the detonator material therewithin at that particular side of the cap and serves as impact transmitting member for squeezing the detonator material against the shoulder within the cap to ⁇ cause ignition.
  • the single percussion cap metal element thereby avoids the need for a separate anvil member and the concomitant expense and production di'iculties occasioned thereby.
  • FIG. 1 illustrates a perforated percussion cap 1 which takes the form of a tubular metal member having an inside wall surface 2 of larger cross section generally defining a top recess 4space 3 and an inside wall surface 4 generally defining a bottom recess 5.
  • the point of registry or transition from the top recess 3 and the bottom recess 5 denes a shoulder surface 6 transverse to the axis of cap l extending from the larger cross sectional diameter indicated at 7 to the smaller cross sectional diameter indicated at 8.
  • a suitable detonator material or explosive charge 9, such as for example, mercury fulminate, is disposed within the bottom recess 5 as well as a slight portion of the top recess 3 above the shoulder surface 6.
  • a foil or plate member is longitudinally slidably disposed across the extent of recess 3 in abutting engagement with the inside wall surface 2 of larger cross section.
  • the explosive charge 9 completely occupies the space between foil 10 and shoulder surface 6 and is in peripheral engagement with the adjce'nt wll surface 2 of the top recess 3.
  • Foil 10 may be lacquered or coated with other protective material to prevent moisture from entering the cap and the detonator material.
  • a -bottom recess 11 is provided for openly communicating the detonator material 9 with the: bottom end of cap 1. l
  • FIG. 3 shows the cap 1 in accordance with the embodiment of FIG. 1 situated within a primer device in sealed condition whereby no moisture may enter the detonator material 9 by way of opening 11.
  • cap 1 is placed in a suitable large recess 12 defined in the upper end of sleeve 13 of the primer fuse housing.
  • Primer or delay material 15 is suitably disposed within central bore 16 in communication with detonator material 9 of'cap 1 by reason of opening 11. Both materials 9 and 15, however, are sealed against moisture by reason of the particular construction involved.
  • the strueture and function of the primer device shown in FIG. 3 is conventional, whereby upo'n impact of percussion cap 1, by suitable means, such as a firing pin, ignition will proceed to and through the primer material 15 whereby the transmission detonator cap located in bottom recess 17 will serve to explode the device in connection with which the arrangement of FIG. 3 is used, in the desired manner.
  • FIG. 2 is similar in construction to FIG. 1, percussion cap 1 in this instance having the same elements as those described with respect to FIG. l except that bot- Vtom recess 5 is closed off from the exterior of cap 1 by Ibottom wall portion 11a in place of the bottom opening 11 employed in the embodiment of FIG.V 1.
  • the detonator material 9 will be effectively sealed oif from moisture by bottom wall 11a as well as foil 10.
  • shoulder surface 6 functions as'the anvil of the percussion'cap whereby upon impact of foil 10, theA detonator material 9 will be placed under pressure sutiicient to cause the ignition thereof.
  • the bottom recess 5 may be provided with any desired diameter, although preferably it should be approximately 0.6 mm. smaller than the inside diameter of the top recess 3.
  • the amount of detonator material 9 disposed within the recess portion below the foil 10 may be adjusted in accordance with the intended use of the percussion cap in each case, but, of course, a certain amount of such material must be present between the anvil surface 6 and the foil 10.
  • the diameter of the bottom recess 5 may be varied as well as the thickness of bottom wall 11a inthe ycase of the embodiment of FIG. 2.
  • the diameter of bottom recess 5 will be 4about 2% of the diameter of top recess 3.
  • the particular quantity of detonator material 9 placed above the anvil surface 6 will depend upon the desired Vsensitivity since the tiring pin or other impact means will strike foil 10 .andthereby actupon the detonator material 9 immediately therebelow.
  • the direction of the ignition flame may be suitably regulated.
  • the bottom end of the percussion capsule will be closed ott by wall 11a in the manner shown in FIG. 2.
  • opening 11 is provided in recess 5 as is the case with the operation of the device of FIG. 3.
  • Rim ,ignitable percussion cap which comprises a body member having a recess defined therein providing said body member with an interior surface, said recess being partially defined intermediate its depth by a shoulder portion provided in the adjacent portion of the interior surface of said body member surrounding the recess, a separate thin foil longitudinally slidably disposed within the recess above'and in slightly spaced relation to the shoulder portion throughouttheir common extent, said thin foil extending across the recess into covering contact with said adjacent portion of the interior surface of said body member surrounding the recess, and an explosive charge occupying the partV of said recess below said thin foil including completely that part of said recess located v between the thin foil and the shoulder portion slightly spaced therefrom and in peripheral engagement with said interior ysurface of said body member.
  • Percussion cap I according -to claim l, wherein the part 1 of said recess below said thin foil is in open communication withk the exterior of the body member by means deining an opening in the body member remote from said Y ⁇ thin foil being spaced axially a slight dist-ance with respect tosad shoulder port-ion, and an explosive charge completely occupying the'inter-ior space of said tubular body between said thin foil and said shoulder portion and in peripheral engagement with said internal wall of said tubular metal body.
  • Percussion cap for rim tiring using slight impact energy which comprises a tubular body member having a central chamber longitudinally therewithin, said chamber yhaving one axial portion of smaller cross-section in partial registry with the other axial portion of larger cross-section, the axial point of registry and transition from the portion of smaller cross-section to the portion of larger crosssection defining ya shoulder transverse to the axis of said chamber, rand an imperforate separate at thin foil sealingly disposed within and in longitudinally slidable contact with the wall of said chamber transverse to the portion of larger cross-section at an Vaxial point spaced slightly from said shoulder, the portion of Vsmaller cross-section and that part of the portion of larger cross-section in the slight space between said foil and shoulder deiining a receptacle space containing ⁇ an explosive charge therewithin cornpletely occupying at least the space between the foil and shoulder in peripheral engagement with the wall of the chamber Iportion having the larger cross-section, said cap 5 being adapted to be fired by slight impact with

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Air Bags (AREA)
  • Closures For Containers (AREA)
  • Pressure Welding/Diffusion-Bonding (AREA)
US123400A 1960-07-14 1961-07-10 Percussion cap Expired - Lifetime US3169483A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DED33783A DE1174654B (de) 1960-07-14 1960-07-14 Zuendhuetchen fuer Schlagzuendung

Publications (1)

Publication Number Publication Date
US3169483A true US3169483A (en) 1965-02-16

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Family Applications (1)

Application Number Title Priority Date Filing Date
US123400A Expired - Lifetime US3169483A (en) 1960-07-14 1961-07-10 Percussion cap

Country Status (5)

Country Link
US (1) US3169483A (fr)
BE (1) BE604184A (fr)
CH (1) CH384411A (fr)
DE (1) DE1174654B (fr)
GB (1) GB982407A (fr)

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3645207A (en) * 1969-05-06 1972-02-29 Trw Inc Combustible moistureproof percussion primer
US4326847A (en) * 1979-12-21 1982-04-27 Mcdonnell Douglas Corporation Launch environment simulator
US4439155A (en) * 1979-12-21 1984-03-27 Mcdonnell Douglas Corporation End caps for use with a launch environment simulator process and structure
US4459914A (en) * 1982-05-17 1984-07-17 Caruso Anthony M Impact-detonated time delay fuse
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
WO2005095884A1 (fr) * 2004-04-02 2005-10-13 Techventure Investments Pty Ltd Projectile
US20060138715A1 (en) * 2004-12-01 2006-06-29 Lim Leong C Doped ceramic materials and methods of forming the same
USD555749S1 (en) * 2005-04-19 2007-11-20 Epp Cecil J Small rifle primer adapter
US20090178585A1 (en) * 2004-04-02 2009-07-16 Leslie Mervyn Harrison Projectile
RU2846587C1 (ru) * 2024-09-23 2025-09-09 Российская Федерация, от имени которой выступает Министерство обороны Российской Федерации Ударная трубка для воспламенения картузных метательных зарядов тяжелых орудий

Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
BE520143A (fr) * 1952-07-09
US78322A (en) * 1868-05-26 Eugene pertuiset
US190861A (en) * 1877-05-15 Improvement in percussion-fuses
US643974A (en) * 1899-10-16 1900-02-20 Vickers Sons & Maxim Ltd Percussion-primer.
US831947A (en) * 1905-04-15 1906-09-25 Joseph W Graeme Priming device.
US2365708A (en) * 1941-06-07 1944-12-26 William J Landen Projectile
US2396978A (en) * 1941-04-28 1946-03-19 Franklin R Amthor Shell
US2425418A (en) * 1942-04-18 1947-08-12 Remington Arms Co Inc Ammunition
US2441248A (en) * 1941-08-07 1948-05-11 Ici Ltd Fast burning delay fuze
US2868128A (en) * 1946-03-19 1959-01-13 Thomas D Ramsey Hermetically sealed primer

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR340790A (fr) * 1904-02-25 1904-07-20 Pietro Brighenti Amorce à effet de feu central et direct
AT32076B (de) * 1907-01-12 1908-03-10 Anton Keller Metallwerk Und Mu Zündvorrichtung für Zentralfeuer-Patronen.

Patent Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US78322A (en) * 1868-05-26 Eugene pertuiset
US190861A (en) * 1877-05-15 Improvement in percussion-fuses
US643974A (en) * 1899-10-16 1900-02-20 Vickers Sons & Maxim Ltd Percussion-primer.
US831947A (en) * 1905-04-15 1906-09-25 Joseph W Graeme Priming device.
US2396978A (en) * 1941-04-28 1946-03-19 Franklin R Amthor Shell
US2365708A (en) * 1941-06-07 1944-12-26 William J Landen Projectile
US2441248A (en) * 1941-08-07 1948-05-11 Ici Ltd Fast burning delay fuze
US2425418A (en) * 1942-04-18 1947-08-12 Remington Arms Co Inc Ammunition
US2868128A (en) * 1946-03-19 1959-01-13 Thomas D Ramsey Hermetically sealed primer
BE520143A (fr) * 1952-07-09

Cited By (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3645207A (en) * 1969-05-06 1972-02-29 Trw Inc Combustible moistureproof percussion primer
US4326847A (en) * 1979-12-21 1982-04-27 Mcdonnell Douglas Corporation Launch environment simulator
US4439155A (en) * 1979-12-21 1984-03-27 Mcdonnell Douglas Corporation End caps for use with a launch environment simulator process and structure
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
US4459914A (en) * 1982-05-17 1984-07-17 Caruso Anthony M Impact-detonated time delay fuse
US7448325B2 (en) 2004-04-02 2008-11-11 Techventure Investments Pty. Ltd. Projectile
US20060230971A1 (en) * 2004-04-02 2006-10-19 Harrison Leslie M Projectile
WO2005095884A1 (fr) * 2004-04-02 2005-10-13 Techventure Investments Pty Ltd Projectile
US20090178585A1 (en) * 2004-04-02 2009-07-16 Leslie Mervyn Harrison Projectile
US7921780B2 (en) 2004-04-02 2011-04-12 Techventure Investments Pty Ltd Projectile
US20060138715A1 (en) * 2004-12-01 2006-06-29 Lim Leong C Doped ceramic materials and methods of forming the same
USD555749S1 (en) * 2005-04-19 2007-11-20 Epp Cecil J Small rifle primer adapter
RU2846587C1 (ru) * 2024-09-23 2025-09-09 Российская Федерация, от имени которой выступает Министерство обороны Российской Федерации Ударная трубка для воспламенения картузных метательных зарядов тяжелых орудий

Also Published As

Publication number Publication date
CH384411A (de) 1964-11-15
BE604184A (fr) 1961-09-18
DE1174654B (de) 1964-07-23
GB982407A (en) 1965-02-03

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