EP4086564A1 - 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

Info

Publication number: EP4086564A1
Authority: EP; European Patent Office
Prior art keywords: firing; firing pin; ignition device; longitudinal axis; pins
Prior art date: 2021-05-04
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.): Granted

Application number

EP22171137.7A

Other languages

German (de)

English (en)

Other versions

EP4086564C0 (fr

EP4086564B1 (fr

Inventor

Rolf Denzler

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.)

Individual

Original Assignee

Individual

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.)

2021-05-04

Filing date

2022-05-02

Publication date

2022-11-09

2022-05-02 Application filed by Individual filed Critical Individual

2022-11-09 Publication of EP4086564A1 publication Critical patent/EP4086564A1/fr

2024-01-31 Application granted granted Critical

2024-01-31 Publication of EP4086564C0 publication Critical patent/EP4086564C0/fr

2024-01-31 Publication of EP4086564B1 publication Critical patent/EP4086564B1/fr

Status Active legal-status Critical Current

2042-05-02 Anticipated expiration legal-status Critical

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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 is located in the center of the case base.
the priming charge in rimfire cartridges is cast into the base of the case and thus into the inner circumferential groove of the hollow rim of the case protruding from the outside.
the firing pin hits the edge of the case base from behind, it is crushed, which triggers the ignition of the primer charge located in the groove and, as a result, the ignition of the propellant charge powder in contact with it.
the disadvantage is that ignition by crushing the edge requires a low 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 manufacture the sleeve by deep drawing. This limits the combustion pressure and thus also the maximum projectile energy.
Another disadvantage is that once a cartridge case has been fired, it can no longer be used because the edge of the case has been irreversibly damaged by the impression of the firing pin.
U.S. 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 threads onto the forward end of the slide bolt and slides against the rear of a rimfire cartridge.
the locking cap is provided with three guide bores, in which three pins of a cylindrical firing pin are guided. When the trigger is released, the pins will hit the rim of the rimfire cartridge and a shot will be fired.
U.S. Patent No. 7,143,537 from 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 in the end of the firing pin shaft for retention therein with a spring retaining sleeve, a main spring and a main spring sleeve.
the firing pin is detachable 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 now based on the object of specifying an ignition device for a rimfire cartridge which triggers reliable ignition and ensures axially stable alignment of the cartridge on the sighting axis.
the ignition device is provided for a firearm with a rimfire cartridge and has a firing pin and a pretensioning 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 At its front end in the direction of travel, the guide cylinder has a base plate with bores that serve to guide the firing pins.
the free end of the firing pins is designed with an edge that is bevelled 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 setback in the angular range of 5° to 35° can be provided on each side relative 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 ground-back advantageously forms an angle of 1° to 6° to the horizontal, increasing outwards.
this firing head can be arranged in a freely swinging manner on the firing pin.
an elastic intermediate piece can be provided between the firing head and the firing pin.
the impact base of the guide cylinder has a circular indentation, which is used to accommodate and position the base of the rimfire ignitable cartridge.
an ignition device 1 with a firing pin 2 a movable firing head 3 with a longitudinal axis 4 and three firing pins 5 arranged symmetrically to the longitudinal axis on the firing head 3 is 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 of the cartridge base before the impact with the firing pin 2 takes place.
an elastic spacer is provided between the firing head 3 and the firing pin 2 (not shown).
a guide cylinder 6 is shown with an impact base 7 which has three bores 8 which serve to guide the firing pins 4 . Furthermore, the impact base 7 has a circular depression 9, which serves to accommodate 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 the groove 12 in the form of a ring and surrounds a propellant charge 14 .
a firing pin 15 shown schematically, the edge 16 is suddenly crushed, whereby the ignition mass 13 is ignited by friction and then the propellant charge 14 ignites.
figure 7 shows the firing pins 5 in a side view, the front free ends 20 of which are each provided with a beveled edge 21 .
the beveled edge 21 is in figure 8 can be seen more precisely and forms an angle or concave clearance of 10° to 30° in relation to the perpendicular to the longitudinal axis 4 of the firing pin 5.
Perpendicular to the beveled edge 21 there is a cutback 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 ground-back 23, which in particular forms an angle of 1° to 6° to the horizontal, increasing outwards.
the free end 20 of the firing pin 5 can also have a different configuration. What is essential here is that at least one beveled edge 21 is provided, which points towards the fuse head 3 at an angle downwards to the longitudinal axis 4 .
the cutbacks 22 and 23 can be omitted.
the multiple firing of a rimfire cartridge can also be achieved with two firing pins 5, which are arranged symmetrically with respect to the longitudinal axis 4.
four or five firing pins 5 can also be provided, with the space conditions on the firing head 3 and the diameter of the firing pins 5 limiting the maximum number of firing pins 5 .
Three firing pins 5 are optimal, as in FIGS Figures 7 and 8 pictured.
the multiple ignition with the ignition device according to the invention results in less environmental pollution, since the ignition mass and the gunpowder 13 burns completely. With three firing pins 5, there are no longer any malfunctions due to cold strikes, since these are eliminated by multiple firing.
the free end 20 of the firing pin 5 can also be used, which form a beveled edge.
the free end 20 can be square, rectangular, crescent-shaped, or circular.

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

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

Family

ID=81579625

Family Applications (1)

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

Country Status (1)

Country	Link
EP (1)	EP4086564B1 (fr)

Citations (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

2022
- 2022-05-02 EP EP22171137.7A patent/EP4086564B1/fr active Active

Patent Citations (4)

* 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
US7516570B2 (en) *	2003-11-19	2009-04-14	Ra Brands, L.L.C.	Firing pin assembly

Also Published As

Publication number	Publication date
EP4086564C0 (fr)	2024-01-31
EP4086564B1 (fr)	2024-01-31

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