US3292540A - Primer - Google Patents

Primer Download PDF

Info

Publication number
US3292540A
US3292540A US416029A US41602964A US3292540A US 3292540 A US3292540 A US 3292540A US 416029 A US416029 A US 416029A US 41602964 A US41602964 A US 41602964A US 3292540 A US3292540 A US 3292540A
Authority
US
United States
Prior art keywords
faces
primer
impact
anvil
plate
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
US416029A
Other languages
English (en)
Inventor
Stadler Hans
Gawlick Heinz
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
Application filed by Dynamit Nobel AG filed Critical Dynamit Nobel AG
Application granted granted Critical
Publication of US3292540A publication Critical patent/US3292540A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

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
    • F42B5/26—Cartridge cases
    • F42B5/32—Cartridge cases for rim fire
    • 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 primer, and more particularly to a primer anvil construction for use with high-sensitivity primers.
  • a so-called primer anvil is used in general as counter-surface or abutment against the impact exerted by the firing pin, against which is pressed the primer composition of the primer or percussion cap.
  • the sensitivity of the primer depends on the surface pressure produced by the impact between the anvil and the primer composition. The smaller the surface pressure, the smaller the sensitivity of the percussion primer. Since one aims in general at a high sensitivity, various possibilities have already been developed in order to increase the surface pressure by decreasing the anvil surface. Thus, for instance, it has already been proposed heretofore to construct with an anvil having a central ignition channel, the impact edge as a ring with sharp edges.
  • the safety of the ignition or priming depends, in fact, not from the impact surface of the anvil but also on the fact, how the firing pin or striker impinges against the impact surface.
  • high precision devices which can be manufactured with a corresponding high accuracy
  • substantial difficulties need not be feared.
  • numerous applications of percussion primers also exist in which such a high precision and accuracy in the location of the firing pin with respect to the anvil is not obtainable. If the firing pin impinges with a larger eccentricity, then the impact effect on the anvil is correspondingly decreased.
  • the present invention aims at producing a primer anvil which assures also with relatively large eccentricity of the firing pin a high surface pressure, that is, a high sensitivity.
  • This aim is achieved by the present invention in that the anvil is constructed in plate form with a plurality of impact humps or ridges of small surface at the impact edge.
  • the term humps is to be interpreted in this context to mean both ledge or bar-like projections as well as point-like projections.
  • the humps are constructed as impact ledges or strips, then they should in particular have a spacing of about half the diameter of the firing pin.
  • the anvil was stamped out of sheet metal of 1.4 mm. thickness with impact ledges whose distance amounted to 0.8 mm.
  • an object of the present invention to provide an anvil for percussion primers which obviates, by simple means, the shortcomings and drawbacks encountered with the prior art constructions.
  • Another object of the present invention resides in the provision of a primer anvil which assure high sensitivity even in case of eccentric impact of the firing pin.
  • a further object of the present invention resides in the provision of a primer anvil construction which can be made in a simple manner without requiring high tolerances in its dimensions or the dimensions of the firing pin mechanism.
  • Another object of the present invention resides in the provision of a primer anvil, which is so constructed and arranged as to assure a high percussion etfect even in case of eccentric impact of the firing pin.
  • a further object of the present invention resides in the provision of a primer anvil achieving the aforementioned aims and objects by extremely simple means in such a manner as to safeguard also a high sensitivity owing to a high surface pressure.
  • FIGURE 1 is a cross sectional view through a primer with a primer anvil in accordance with the present invention having two impact ledges and assembled into a primer,
  • FIGURE 2 is an elevational view of a modified embodiment of a primer anvil with three impact ledges in accordance with the present invention
  • FIGURE 2a is a plan view on the primer anvil of FIGURE 2
  • FIGURE 2b is a right side elevational view of the primer anvil of FIGURE 2.
  • the primer anvil is generally designated in this figure by reference numeral 1 and has a construction in accordance with the present invention. More particularly, the primer anvil 1 has the shape of a plate which converges comically in the lower part 2 thereof. The impact edge is recessed at 3 so that two impact ledges 4 and 5 of small surface result. The impact ledges 4 and 5 abut against the cover 7 of the primer composition 8 which is pressed into a blank or cup 9.
  • the anvil 1 and the cup 9 are inserted into a case 12.
  • Two shoulders 10 and 11 are formed into the anvil 1, whose diameter is approximately equal to the inner diameter of the case 12.
  • the anvil 1 is supported with the shoulders 10 and 11 thereof against a case 13 which is inserted into the case 12 and is held therein by a flanged rim 15.
  • the case 13 serves for the accommodation of a booster charge 14 which is also contained in the cup 9.
  • the booster charge 14 is closed off in the upward direction by a foil 22.
  • the firing pin (not shown) impinges eccentrically against the impact surface 16 of the case 12, then in any case one of the two impact ledges 4 or 5 becomes fully efiective, that is, the sensitivity of the primer is also high with eccentric impacts.
  • FIG- URE 2 illustrates an example of such modification.
  • the impact edge of the anvil 1 is twice undercut at 17 and 18 so that three impact ledges 19, 20, and 21 result.
  • FIGURE 2b shows the diameter of the projection surface of the impact edge. This diameter fis substantially equal to the thickness d of the anvil 1 so that the impact surface between the two outer ledges 19 and 21 is a square. The distance of the impact ledges is thereby equal to half the firing pin diameter. Even with very large eccentricity of the firing pin a high sensitivity of the primer is assured thereby.
  • a primer anvil for percussion primers comprising a plate member having impact edge means, and said impact edge means being provided with a plurality of impact hump means, each having a relatively small impact effective surface of substantial extent,
  • a primer anvil for percussion primers comprising a plate member having impact edge means, and said impact edge means being provided with a plurality of impact hump means, each having a relatively small impact elfective surfac of substantial extent,
  • tubular case member together with the plate member being inserted into said case, and a cup-shaped primer cup supported against the bottom of the said outer case.
  • a primer anvil for percussion primers comprising a plate member having impact edge means, and said impact edge means being provided with a plurality of impact hump means, each having a relatively small impact effective surface of substantial extent,
  • tubular case member together with the plate member being inserted into said case, and a cup-shaped primer cup supported against the bottom of the said outer case.
  • a prime anvil for percussion primers comprising a plate member having lateral edges and impact edge means, and said impact edge means being provided with a plurality of impact hump means, each having a relatively small impact effective surface of substantial extent,
  • tubular case member together with the plate member being inserted into said case, and a cup-shaped primer cup supported against the bottom of the said outer case.
  • a primer anvil for percussion primers comprising a plate member having lateral edges and impact edge means, and said impact edge means being provided with a plurality of impact hump means, each having a relatively small impact effective surface of substantial extent, said lateral edges converging in the direction toward the impact edge means and the impact edge means being undercut to thereby form the impact hump means.
  • the projected surface of the impact edge means forming a substantially square surface
  • tubular case member together with the plate member being inserted into said case, and a cup-shaped primer cup supported against the bottom of the said outer case.
  • a percussion primer comprising a primer explosive charge; a primer anvil mounted closely adjacent to said charge; said anvil including .a substantially flat plate of rigid material having a predetermined thickness; said plate having generally parallel flat opposite faces and side edges extending generally at right angles to said faces; said plate having impact edge means abutting said charge for receiving the impact delivered to said charge by a firing pin; said edge means having one and only one channel extending from one of said faces to the other of said faces and at substantially right angles to said faces, and defining a single impact edge on each side of said channel extending from one of said faces to the other of said faces and at substantially right angles to said faces; the dimensions from one of said faces to the other of said faces of said ledges being substantially equal to the thickness from one of said faces to the other of said faces of said plate; and said edge means being substantially square in plane form.
  • the device of claim 6, including a substantially tubular outer case having a closed bottom end; a cup-shaped primer cup supported against the bottom of said outer case; said primer explosive charge being contained within said primer cup; a booster charge substantially surrounding said plate; and a cover mounted within said primer cup separating said primer explosive charge and said booster charge.
  • said plate has opposite shoulder portions extending radially outwardly; a tubular case member; said plate being partially inserted into said tubular case member with said shoulders axially abutting against the end of said tubular case member that is closest to said impact edge means; an outer substantially tubular case being closed at the bottom; said tubular case member and said plate being completely mounted within said outer case; and said primer explosive charge being located between the bottom of said outer case and said edge means.
  • the device of claim 9 including a booster charge located within said tubular case member and substantially surrounding said plate.
  • the device of claim 10 including a cup-shaped primer cup supported against the bottom of said outer case and containing said primer explosive charge; said booster charge extending into the upper open end of said primer cup; and a cover mounted within said primer cup separating said primer explosive charge and said booster.
  • a percussion primer comprising a primer explosive charge; a primer anvil mounted closely adjacent to said charge; said anvil including a substantially flat plate of rigid material. having a predetermined thickness; said plate having generally parallel flat opposite faces and side edges extending generally at right angles to said faces; said plates having impact edge means abutting said charge for receiving the impact delivered to said charge by -a firing pin; said edge means having two and only two channels extending substantially parallel to each other from one of said faces to the other of said faces and at substantially right angles to said faces, and defining only three impact ledges, one of said ledges being on each side of said channels extending from one of said faces to the other of said faces and at substantially right angles to said faces; the dimension from one of said faces to the other of said faces of said ledges being substantially equal to the thickness from one of said faces to the other of said faces of said plate; and said edge means being substantially square in plane form.
  • the device of claim 12 including a substantially tubular outer case having a closed bottom end; a cupshaped primer cup supported against the bottom of said outer case; said primer explosive charge being contained within said primer cup; a booster charge substantially surrounding said plate; and a cover mounted within said primer cup separating said primer explosive charge and said booster charge.
  • said plate has opposite shoulder portions extending radially outwardly; a tubular case member, said plate being partially inserted into said tubular case member with said shoulders axially abutting against the end of said tubular case member that is closest to said impact edge means; an outer substantially tubular case being closed at the bottom; said tubular case member and said plate being completely mounted within said outer case; and said primer explosive charge being located between the bottom of said outer case and said edge means.
  • said outer case has an upper open end with a flanged rim extending inwardly; and a closure disc mounted between said flanged rim and said tubular case member for axially supporting said tubular case member and closing the upper end of said outer case.
  • the device of claim 15 including a booster charge 7 located within said tubular case member and substautially surrounding said plate.
  • the device of claim 16 including a cup-shaped primer cup supported against the bottom said outer case and containing said primer explosive charge; said booster charge extending into the upper open end of said primer cup; and a cover mounted within said primer cup separating said primer explosive charge and said booster.

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Slide Fasteners, Snap Fasteners, And Hook Fasteners (AREA)
  • Electrophonic Musical Instruments (AREA)
  • Air Bags (AREA)
US416029A 1963-12-06 1964-12-04 Primer Expired - Lifetime US3292540A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DED43101A DE1214578B (de) 1963-12-06 1963-12-06 Plattenfoermiger Amboss fuer eine Zuendkapsel

Publications (1)

Publication Number Publication Date
US3292540A true US3292540A (en) 1966-12-20

Family

ID=7047339

Family Applications (1)

Application Number Title Priority Date Filing Date
US416029A Expired - Lifetime US3292540A (en) 1963-12-06 1964-12-04 Primer

Country Status (6)

Country Link
US (1) US3292540A (enrdf_load_stackoverflow)
BE (1) BE656625A (enrdf_load_stackoverflow)
DE (1) DE1214578B (enrdf_load_stackoverflow)
GB (1) GB1084239A (enrdf_load_stackoverflow)
IL (1) IL22538A (enrdf_load_stackoverflow)
NL (1) NL6414104A (enrdf_load_stackoverflow)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3808973A (en) * 1971-05-31 1974-05-07 Giulo Fiocchi Spa Self-propelling projectile for firearms

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US431601A (en) * 1890-07-08 Wilhelm lorenz
GB253395A (en) * 1925-09-17 1926-06-17 Rheinisch Westfaelische Spreng Improvements in or relating to percussion caps
US1900159A (en) * 1931-05-23 1933-03-07 Remington Arms Co Inc Ammunition
FR757393A (fr) * 1934-04-18 1933-12-26 Cartouche réamorcable à percussion centrale
FR934627A (fr) * 1946-10-03 1948-05-27 Perfectionnements aux amorces pour cartouches à douille en aluminium ou alliage d'aluminium
US3236181A (en) * 1963-04-19 1966-02-22 William B Woodring Primer assembly

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US653953A (en) * 1900-01-02 1900-07-17 Winchester Repeating Arms Co Primer for cartridges.
US905358A (en) * 1906-11-23 1908-12-01 Peters Cartridge Company Shell.
US933030A (en) * 1908-06-15 1909-08-31 Liberty Cartridge Company Inc Shell-primer for breech-loading guns.
FR423044A (fr) * 1910-11-26 1911-04-05 Cartoucherie Francaise Appareil d'amorcage à flamme directe pour cartouches
AT61279B (de) * 1912-09-17 1913-09-25 Karl Rehak Patronenhülse mit Amboß.

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US431601A (en) * 1890-07-08 Wilhelm lorenz
GB253395A (en) * 1925-09-17 1926-06-17 Rheinisch Westfaelische Spreng Improvements in or relating to percussion caps
US1900159A (en) * 1931-05-23 1933-03-07 Remington Arms Co Inc Ammunition
FR757393A (fr) * 1934-04-18 1933-12-26 Cartouche réamorcable à percussion centrale
FR934627A (fr) * 1946-10-03 1948-05-27 Perfectionnements aux amorces pour cartouches à douille en aluminium ou alliage d'aluminium
US3236181A (en) * 1963-04-19 1966-02-22 William B Woodring Primer assembly

Also Published As

Publication number Publication date
GB1084239A (enrdf_load_stackoverflow)
BE656625A (enrdf_load_stackoverflow) 1965-04-01
NL6414104A (enrdf_load_stackoverflow) 1965-06-07
DE1214578B (de) 1966-04-14
IL22538A (en) 1968-06-20

Similar Documents

Publication Publication Date Title
US3614929A (en) Plastic shotgun shell
US3025794A (en) Perforating apparatus
US2856850A (en) Shaped charge
US3736875A (en) Explosive charge with annular ignition gap
US3306203A (en) Threaded percussion primer
US3517615A (en) Explosive wave shaper
US2763210A (en) Shaped charges
US3292540A (en) Primer
US3688702A (en) Detonator device for explosive charge exhibiting detonating effect capable of bridging gap between spaced charges
US3359906A (en) Shotshell base wad
US3994227A (en) Bounding anti-personnel mine
US3292541A (en) Cartridge
US3292536A (en) Shaped explosive charges
US2868128A (en) Hermetically sealed primer
US3154014A (en) Method of and apparatus for accelerating gases and solids
US3045524A (en) Booster cup and method of making same
US3455244A (en) Shockproof primer cover
US4729318A (en) Explosive plane-wave lens
US2703531A (en) Fuze for projectiles
US3124075A (en) Means for igniting an igniter primer
RU2185522C1 (ru) Воспламенительное устройство для ракетного двигателя
US2975710A (en) Projectile
US573897A (en) Frederik mohr
US3577922A (en) Combustible shell base
US3254602A (en) Detonator mechanism