EP4086564B1 - Dispositif de mise à feu pour une cartouche à percussion annulaire - Google Patents

Dispositif de mise à feu pour une cartouche à percussion annulaire Download PDF

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Publication number
EP4086564B1
EP4086564B1 EP22171137.7A EP22171137A EP4086564B1 EP 4086564 B1 EP4086564 B1 EP 4086564B1 EP 22171137 A EP22171137 A EP 22171137A EP 4086564 B1 EP4086564 B1 EP 4086564B1
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EP
European Patent Office
Prior art keywords
ignition device
firing
ignition
longitudinal axis
pins
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Application number
EP22171137.7A
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German (de)
English (en)
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EP4086564A1 (fr
EP4086564C0 (fr
Inventor
Rolf Denzler
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Individual
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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F41—WEAPONS
    • F41A—FUNCTIONAL FEATURES OR DETAILS COMMON TO BOTH SMALLARMS AND ORDNANCE, e.g. CANNONS; MOUNTINGS FOR SMALLARMS OR ORDNANCE
    • F41A19/00—Firing or trigger mechanisms; Cocking mechanisms
    • F41A19/06—Mechanical firing mechanisms, e.g. counterrecoil firing, recoil actuated firing mechanisms
    • F41A19/13—Percussion or firing pins, i.e. fixed or slidably-mounted striker elements; Mountings therefor

Definitions

  • the invention relates to an ignition device for a rimfire cartridge according to the preamble of patent claim 1.
  • a primer cap is arranged centrally in the base of the case. Unlike these centerfire cartridges, the primer on rimfire cartridges is cast into the bottom of the case and thus into the inner circumferential groove of the hollow edge of the case that protrudes on the outside.
  • the firing pin hits the edge of the case base from behind, it is crushed, which triggers the ignition of the primer in the groove and, as a result, the ignition of the propellant powder in contact with it.
  • the disadvantage is that the ignition due to crushing of the edge requires a small maximum wall thickness, at least in the area of the sleeve. For these reasons, a soft material such as copper or brass with a high copper content is used to produce the sleeve by deep drawing. The combustion pressure and thus also the maximum projectile energy are thereby limited.
  • Another disadvantage is that once cartridge cases have been fired, they can no longer be used because the edge of the case has been irreversibly damaged by the firing pin impression.
  • US Patent No. 2,793,455 from 1954 describes a rifle with a sliding bolt, which is guided in the bore of a rifle barrel.
  • a breech cap is screwed onto the front end of the sliding bolt and is pushed against the back of a rimfire cartridge.
  • the closure cap is provided with three guide holes in which three pins of a cylindrical firing pin are guided. When the trigger is pulled, the pins hit the edge of the rimfire cartridge and a shot is fired.
  • the ignition device described above Since the guidance of the pins in the guide holes must be very precise and an exact impact on the base of the cartridge case cannot be guaranteed, the ignition device described above has not proven itself in practice. In order to avoid misfiring, the Henry rifles, the Winchester rifles of the Model 1866, and the Swiss Vetterli rifles, for example, were equipped with a double ignition, which struck opposite sides of the cartridge rim. This double ignition has also not proven successful and is no longer used today.
  • the US Patent No. 7,143,537 of 2006 describes a firing pin assembly that includes a single firing pin and a firing pin shaft.
  • the firing pin is received in a slot of the end of the firing pin shaft to be retained therein with a spring retaining sleeve, a main spring and a main spring sleeve.
  • the firing pin is removable from the firing pin assembly and can be replaced to provide long-term use of the firing pin assembly.
  • the spring retaining sleeve is oriented to hold the components securely in place, the firing pin assembly acts as a unit.
  • the present invention is based on the object of specifying an ignition device for a rimfire cartridge, which triggers reliable ignition and ensures an axially stable alignment of the cartridge on the target axis.
  • the ignition device is intended for a firearm with a rimfire cartridge and has a firing pin and a biasing spring, the firing pin being guided in a guide cylinder in the breech housing of the firearm.
  • the firing pin is provided with a firing head which has at least two firing pins arranged symmetrically to the longitudinal axis of the firing head.
  • the guide cylinder has, at its front end in the direction of travel, a butt plate with holes which is used to guide the firing pins.
  • the free end of the ignition pins is designed with an edge that is beveled towards the longitudinal axis
  • the beveled edge according to claim 2 forms an angle of 10° to 30° with respect to the perpendicular to the longitudinal axis of the firing pin.
  • a ground-back can be provided on each side perpendicular to the beveled edge in an angular range of 5° to 35° compared to the perpendicular to the longitudinal axis of the firing pin.
  • the beveled edge is provided with a flat ground back on the side facing away from the longitudinal axis.
  • the concave back grind advantageously forms an angle of 1° to 6° to the horizontal rising outwards.
  • this firing head can be arranged to swing freely on the firing pin.
  • an elastic intermediate piece can be provided between the firing head and the firing pin.
  • the butt base of the guide cylinder has a circular recess which serves to accommodate and position the base of the rimfire-ignitable cartridge.
  • an ignition device 1 with a firing pin 2 a movable ignition head 3 with a longitudinal axis 4 and three ignition pins 5 arranged symmetrically to the longitudinal axis on the ignition head 3 are shown in perspective.
  • the firing head 3 is movable, in particular freely swinging, attached to the firing pin 2 in order to adjust and compensate for any dimensional tolerances in the cartridge base before the strike with the firing pin 2 occurs.
  • an elastic intermediate piece is provided between the firing head 3 and the firing pin 2 (not shown).
  • a guide cylinder 6 is shown with a butt plate 7, which has three bores 8 which serve to guide the ignition pins 4. Furthermore, the butt base 7 has a circular recess 9, which serves to hold a base of a rimfire cartridge.
  • FIG. 5 and 6 the bottom 10 of a cartridge case 11 is shown with a deep-drawn groove 12 - in Figure 5 partly in cold cuts.
  • An ignition mass 13 is provided in a ring shape in the groove 12 and surrounds a propellant charge 14. With a schematically shown firing pin 15, the edge 16 is suddenly crushed, whereby the ignition mass 13 is ignited by friction and then the propellant charge 14 is ignited.
  • Figure 7 shows the ignition pins 5 in a side view, with their front free ends 20 each being provided with a beveled edge 21.
  • the beveled edge 21 is in Figure 8 can be seen in more detail and forms an angle or concave relief of 10° to 30° compared to the perpendicular to the longitudinal axis 4 of the firing pin 5.
  • Perpendicular to the beveled edge 21 there is a ground back 22 on each side in the angular range of 5° to 45° to the longitudinal axis 4 of the firing pin 5 intended.
  • the beveled edge 21 is provided on the side facing away from the longitudinal axis 4 with a flat back grinding 23, which in particular forms an angle of 1° to 6° to the horizontal rising outwards.
  • the free end 20 of the firing pin 5 can also have a different design. It is essential that at least one beveled edge 21 is provided, which points towards the ignition head 3 at an angle downwards to the longitudinal axis 4.
  • the back cuts 22 and 23 can be omitted.
  • Multiple ignition of a rimfire cartridge can also be achieved with two ignition pins 5, which are arranged symmetrically with respect to the longitudinal axis 4.
  • four or five ignition pins 5 can also be provided, with the space available on the ignition head 3 and the diameter of the ignition pins 5 limiting the maximum number of ignition pins 5.
  • Three ignition pins 5 are optimal, as in the Figures 7 and 8 pictured.
  • the multiple ignition with the ignition device according to the invention results in a lower environmental impact, since the ignition mass and the gunpowder 13 burn completely. With three ignition pins 5, there are no longer any malfunctions caused by cold shocks, as these are eliminated by the multiple ignition.
  • the free end 20 of the ignition pin 5 can also be used, which form a beveled edge.
  • the free end 20 can be square, rectangular, crescent-shaped or circular.

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Ignition Installations For Internal Combustion Engines (AREA)
  • Portable Nailing Machines And Staplers (AREA)

Claims (9)

  1. Dispositif de percussion (1) pour une arme à feu avec une cartouche à percussion annulaire, lequel comporte un percuteur (2), un ressort de précontrainte et un cylindre de guidage (6), sachant que le percuteur (2) est guidé dans le cylindre de guidage (6) dans une boîte de culasse de l'arme à feu, sachant que le percuteur (2) est doté d'une tête de percussion (3), laquelle comporte au moins deux axes percuteurs (5) disposés symétriquement par rapport à l'axe longitudinal (4) de la tête de percussion et le cylindre de guidage (6) comporte à son extrémité avant en direction du canon un fond de percussion (7) avec des trous (8), qui servent au guidage des axes percuteurs, caractérisé en ce que l'extrémité libre (20) des axes percuteurs (5) est constituée avec un bord chanfreiné (21) en direction de l'axe longitudinal.
  2. Dispositif de percussion selon la revendication 1, caractérisé en ce que le bord chanfreiné (21) forme un angle de 10° à 30° face à la perpendiculaire par rapport à l'axe longitudinal (4) de l'axe percuteur (5).
  3. Dispositif de percussion selon la revendication 2, caractérisé en ce que perpendiculairement au bord chanfreiné (21), un meulage en retrait (22) est chaque fois prévu latéralement, dans une gamme d'angles de 5° à 35° face à la perpendiculaire par rapport à l'axe longitudinal (4) de l'axe percuteur (5).
  4. Dispositif de percussion selon la revendication 2 ou 3, caractérisé en ce que le bord chanfreiné (21) est doté sur le côté opposé à l'axe longitudinal (4) d'un meulage en retrait concave (23).
  5. Dispositif de percussion selon la revendication 4, caractérisé en ce que le meulage en retrait concave (23) forme un angle de 1° à 6° en augmentation vers l'extérieur par rapport à l'horizontale.
  6. Dispositif de percussion selon l'une quelconque des revendications 1 à 5, caractérisé en ce que le percuteur (2) est doté d'une tête de percussion mobile (3).
  7. Dispositif de percussion selon la revendication 6, caractérisé en ce que la tête de percussion (3) est disposée en oscillation libre sur le percuteur (2).
  8. Dispositif de percussion selon la revendication 7, caractérisé en ce qu'une bague élastique est prévue entre la tête de percussion (3) et le percuteur (2).
  9. Dispositif de percussion selon l'une quelconque des revendications 1 à 8, caractérisé en ce que le fond de percussion (7) du cylindre de guidage (6) comporte une cavité circulaire (9), laquelle sert au logement du culot de la cartouche à percussion annulaire.
EP22171137.7A 2021-05-04 2022-05-02 Dispositif de mise à feu pour une cartouche à percussion annulaire Active EP4086564B1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CH4952021 2021-05-04

Publications (3)

Publication Number Publication Date
EP4086564A1 EP4086564A1 (fr) 2022-11-09
EP4086564B1 true EP4086564B1 (fr) 2024-01-31
EP4086564C0 EP4086564C0 (fr) 2024-01-31

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Application Number Title Priority Date Filing Date
EP22171137.7A Active EP4086564B1 (fr) 2021-05-04 2022-05-02 Dispositif de mise à feu pour une cartouche à percussion annulaire

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EP (1) EP4086564B1 (fr)

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2793455A (en) 1954-12-06 1957-05-28 Melvin C Wignall Firing pin for firearms
US2952934A (en) * 1956-02-14 1960-09-20 Yovanovitch Lazare Firearm with rearward swinging breech block
US7143537B2 (en) 2003-11-19 2006-12-05 Ra Brands, L.L.C. Firing pin assembly

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Publication number Publication date
EP4086564A1 (fr) 2022-11-09
EP4086564C0 (fr) 2024-01-31

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