EP4086564A1 - Ignition device for a rimfire cartridge - Google Patents
Ignition device for a rimfire cartridge Download PDFInfo
- Publication number
- EP4086564A1 EP4086564A1 EP22171137.7A EP22171137A EP4086564A1 EP 4086564 A1 EP4086564 A1 EP 4086564A1 EP 22171137 A EP22171137 A EP 22171137A EP 4086564 A1 EP4086564 A1 EP 4086564A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- firing
- firing pin
- ignition device
- longitudinal axis
- pins
- 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.)
- Granted
Links
- 238000010304 firing Methods 0.000 claims abstract description 87
- 239000003380 propellant Substances 0.000 description 3
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 2
- 239000010949 copper Substances 0.000 description 2
- 229910052802 copper Inorganic materials 0.000 description 2
- 229910001369 Brass Inorganic materials 0.000 description 1
- 230000033228 biological regulation Effects 0.000 description 1
- 239000010951 brass Substances 0.000 description 1
- 238000002485 combustion reaction Methods 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- 239000003721 gunpowder Substances 0.000 description 1
- 238000007373 indentation Methods 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 230000014759 maintenance of location Effects 0.000 description 1
- 230000007257 malfunction Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 230000037452 priming Effects 0.000 description 1
- 239000007779 soft material Substances 0.000 description 1
- 125000006850 spacer group Chemical group 0.000 description 1
Images
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.
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Portable Nailing Machines And Staplers (AREA)
- Ignition Installations For Internal Combustion Engines (AREA)
Abstract
Es wird eine neue Zündvorrichtung (1) für eine Feuerwaffe mit einer randfeuerzündbaren Patrone beschrieben, welche einen Schlagbolzen (2) und einen Vorspannfeder aufweist, wobei der Schlagbolzen (2) in einem Führungszylinder (6) im Verschlussgehäuse der Feuerwaffe geführt ist. Der Schlagbolzen (2) ist mit einem Zündkopf (3) versehen, welcher mindestens zwei symmetrisch zur Längsachse (4) des Zündkopfes angeordnete Zündstifte (5) aufweist. Der Führungszylinder (6) weist einen Stossboden (7) mit Bohrungen (8) auf, die zur Führung der Zündstifte dient. Das freie Ende (20) der Zündstifte (5) ist mit einer zur Längsachse hin abgeschrägten Kante (21) ausgebildet. A new ignition device (1) for a firearm with a rimfire cartridge is described, which has a firing pin (2) and a pretensioning spring, the firing pin (2) being guided in a guide cylinder (6) in the breech housing of the firearm. The firing pin (2) is provided with a firing head (3) which has at least two firing pins (5) arranged symmetrically to the longitudinal axis (4) of the firing head. The guide cylinder (6) has an impact base (7) with bores (8), which serves to guide the firing pins. The free end (20) of the firing pins (5) is formed with an edge (21) which is bevelled towards the longitudinal axis.
Description
Die Erfindung betrifft eine Zündvorrichtung für eine Randfeuerpatrone nach dem Oberbegriff des Patentanspruchs 1.The invention relates to an ignition device for a rimfire cartridge according to the preamble of
Bei den heute meist üblichen Feuerpatronen ist zentral im Hülsenboden ein Zündhütchen angeordnet. Anders als bei diesen Zentralfeuerpatronen ist der Zündsatz bei Randfeuerpatronen in den Boden der Hülse und damit in die innen umlaufende Rille des aussen überstehenden hohlen Randes der Hülse eingegossen. Durch Aufschlagen des Schlagbolzens von hinten auf den Rand des Hülsenbodens wird dieser gequetscht, was die Zündung des in der Rille befindlichen Zündsatzes und in der Folge die Zündung des damit in Kontakt stehenden Treibladungspulvers auslöst. Nachteilig ist, dass die Zündung durch Quetschung des Randes eine geringe maximale Wandstärke bedingt, zumindest im Bereich der Hülse. Aus diesen Gründen wird für die Herstellung der Hülse durch Tiefziehen ein weiches Material, wie Kupfer oder Messing mit hohem Kupfergehalt, verwendet. Der Verbrennungsdruck und somit auch die maximale Geschossenergie sind hierdurch begrenzt. Ein weiterer Nachteil ist, dass einmal abgeschossenen Patronenhülsen nicht mehr weiterverwendet werden können, weil der Hülsenrand durch den Schlagbolzenabdruck irreversibel beschädigt worden ist.In today's most common fire cartridges, a primer is located in the center of the case base. In contrast to these centerfire cartridges, 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. When 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.
Da die Führung der Stifte in den Führungsbohrungen sehr genau sein muss und ein genaues Auftreffen auf den Hülsenboden der Feuerpatrone nicht garantiert werden kann, hat sich die oben beschriebene Zündvorrichtung in der Praxis nicht bewährt. Um Fehlzündungen zu vermeiden, wurden beispielsweise die Henry-Gewehre, die Winchestergewehre des Models 1866, sowie die schweizerischen Vetterli-Gewehre mit einer Doppelzündung ausgerüstet, welche auf gegenüberliegende Seiten des Patronenrandes aufschlugen. Diese Doppelzündung hat sich ebenfalls nicht bewährt und findet heute keine Anwendung mehr.Since the guidance of the pins in the guide bores must be very precise and an exact impact on the case base of the fire cartridge cannot be guaranteed, the ignition device described above has not proven itself in practice. To avoid misfires, the Henry rifles, the Winchester model 1866 rifles, and the Swiss Vetterli rifles, for example, were equipped with a double fuse, which struck opposite sides of the cartridge rim. This double ignition has also not proven itself and is no longer used today.
Das
Auch diese Ausführung kann Fehlzündungen nicht ausschliessen, weshalb Schützen nach Möglichkeit Zentralfeuerpatronen und mit entsprechenden Schlagbolzen ausgerüsteten Feuerwaffen verwenden anstelle von Randfeuerpatronen. Ferner wird durch den einseitigen Aufschlag des Schlagbolzens auf den Rand der Feuerpatrone eine leichte Verkantung der Patrone bewirkt, so dass kein zielgenauer Schuss erreicht werden kann. Deshalb verzichten die meisten Sportschützen auf Randfeuerpatronen, sofern reglementarisch möglich.This version cannot rule out misfires either, which is why shooters use centerfire cartridges and firearms equipped with appropriate firing pins instead of rimfire cartridges whenever possible. Furthermore, the one-sided impact of the firing pin on the rim of the fire cartridge causes the cartridge to tilt slightly, so that an accurate shot cannot be achieved. That is why most sports shooters do without rimfire cartridges, provided the regulations allow it.
Der vorliegenden Erfindung liegt nun die Aufgabe zugrunde, eine Zündvorrichtung für eine Randfeuerpatrone anzugeben, welche eine sichere Zündung auslöst und eine achsstabile Ausrichtung der Patrone auf der Zielachse gewährleistet.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.
Diese Aufgabe wird durch eine Zündvorrichtung mit den Merkmalen des Patentanspruchs 1 gelöst.This object is achieved by an ignition device having the features of
Die erfindungsgemässe Zündvorrichtung ist für eine Feuerwaffe mit einer randfeuerzündbaren Patrone vorgesehen und weist einen Schlagbolzen und einen Vorspannfeder auf, wobei der Schlagbolzen in einem Führungszylinder im Verschlussgehäuse der Feuerwaffe geführt ist. Der Schlagbolzen ist mit einem Zündkopf versehen, welcher mindestens zwei symmetrisch zur Längsachse des Zündkopfes angeordnete Zündstifte aufweist. Der Führungszylinder weist an seinem in Laufrichtung vorderen Ende einen Stossboden mit Bohrungen auf, die zur Führung der Zündstifte dient. Das freie Ende der Zündstifte ist mit einer zur Längsachse hin abgeschrägten Kante ausgebildetThe ignition device according to the invention 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. 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
Vorteilhafterweise bildet die abgeschrägte Kante gemäss Anspruch 2 einen Winkel von 10° bis 30° gegenüber der Senkrechten zur Längsachse des Zündstiftes.Advantageously, 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.
Dabei kann mit Vorteil gemäss Anspruch 3 senkrecht zur abgeschrägten Kante je seitlich ein Rückschliff im Winkelbereich von 5° bis 35° gegenüber der Senkrechten zur Längsachse des Zündstiftes vorgesehen sein.Advantageously, according to
In einer vorteilhaften Ausführung der Zündvorrichtung gemäss Anspruch 4 ist die abgeschrägte Kante auf der von der Längsachse abgewandten Seite mit einem flachen Rückschliff versehen. Gemäss Anspruch 5 bildet der konkave Rückschliff vorteilhafterweise einen Winkel von 1° bis 6° zur Horizontalen nach aussen aufsteigend.In an advantageous embodiment of the ignition device according to
Es hat sich ferner gemäss Anspruch 6 bewährt, den Schlagbolzen mit einem beweglichen Zündkopf zu versehen, um allfällige Hülsenbodentoleranzen auszugleichen. Gemäss Anspruch 7 kann dieser Zündkopf freischwingend auf dem Schlagbolzen angeordnet sein.It has also proven itself according to
Dazu kann gemäss Anspruch 8 zwischen dem Zündkopf und dem Schlagbolzen ein elastisches Zwischenstück vorgesehen sein.For this purpose, according to
In einer vorteilhaften Ausführung der Zündvorrichtung gemäss Anspruch 9 weist der Stossboden des Führungszylinders eine kreisrunde Vertiefung auf, welche zur Aufnahme und Positionierung des Bodens der randfeuerzündbaren Patrone dient.In an advantageous embodiment of the ignition device according to
Weitere Vorteile der Erfindung ergeben sich aus den abhängigen Patentansprüchen und aus der nachfolgenden Beschreibung, in welcher die Erfindung anhand eines in den schematischen Zeichnungen dargestellten Ausführungsbeispieles näher erläutert wird. Es zeigt:
- Fig. 1
- eine Zündvorrichtung mit einem Schlagbolzen, einem beweglichen Zündkopf und drei vorstehenden Zündstiften in perspektivischer Darstellung,
- Fig. 2
- einen Führungszylinder mit einem Stossboden mit Bohrungen in perspektivischer Darstellung,
- Fig. 3
- die Zündvorrichtung der
in Seitenanschicht,Figur 1 - Fig. 4
- der Führungszylinder der
in Seitenansicht,Figur 2 - Fig. 5
- eine schematische Darstellung zur Verdeutlichung der Randfeuerzündung, vor der Auslösung, und
- Fig. 6
- dieselbe Darstellung nach dem Stoss und der Zündung,
- Fig. 7
- eine Seitenansicht der Zündstifte in perspektivischer Darstellung, und
- Fig. 8
- eine Draufsicht der Zündstifte in perspektivischer Darstellung
- 1
- a perspective view of a firing device with a firing pin, a movable firing head and three protruding firing pins,
- 2
- a guide cylinder with a impact base with bores in a perspective view,
- 3
- the ignition device
figure 1 in side view, - 4
- the guide cylinder of
figure 2 in side view, - figure 5
- a schematic representation to clarify the rimfire ignition, before the release, and
- 6
- the same representation after the impact and the ignition,
- 7
- a side view of the firing pins in a perspective view, and
- 8
- a top view of the firing pins in a perspective view
In den
In den
In den
Es versteht sich für den Fachmann, dass das freie Ende 20 des Zündstifts 5 auch eine andere Ausgestaltung haben kann. Wesentlich dabei ist, dass mindestens eine abgeschrägte Kante 21 vorgesehen ist, welche zum Zündkopf 3 hin mit einem Winkel nach unten zur Längsachse 4 zeigt. Die Rückschliffe 22 und 23 können dabei weggelassen werden.It is clear to a person skilled in the art that the
Die Mehrfachzündung einer Randfeuerpatrone kann auch schon erreicht werden mit zwei Zündstiften 5, welche symmetrisch gegenüber der Längsachse 4 angeordnet sind. Anderseits können auch vier oder fünft Zündstifte 5 vorgesehen sein, wobei die Platzverhältnisse auf dem Zündkopf 3 und die Durchmesser der Zündstifte 5 die maximale Anzahl Zündstifte 5 einschränkt. Optimal sind drei Zündstifte 5, wie in den
Durch die Mehrfachzündung mit der erfindungsgemässen Zündvorrichtung ergibt sich eine geringere Umweltbelastung, da die Zündmasse und das Schiesspulver 13 vollständig verbrennt. Es gibt mit drei Zündstiften 5 auch keine Funktionsstörung durch Kaltschläge mehr, da diese durch die Mehrfachzündung eliminiert werden.The multiple ignition with the ignition device according to the invention results in less environmental pollution, since the ignition mass and the
Es können auch andere Formen des freien Endes 20 des Zündstiftes 5 eingesetzt werden, welche eine abgeschrägte Kante bilden. Beispielsweise kann das freie Ende 20 quadratisch, rechteckig, halbmondförmig oder kreisrund ausgebildet sein.Other forms of the
Claims (9)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CH4952021 | 2021-05-04 |
Publications (3)
Publication Number | Publication Date |
---|---|
EP4086564A1 true EP4086564A1 (en) | 2022-11-09 |
EP4086564B1 EP4086564B1 (en) | 2024-01-31 |
EP4086564C0 EP4086564C0 (en) | 2024-01-31 |
Family
ID=81579625
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP22171137.7A Active EP4086564B1 (en) | 2021-05-04 | 2022-05-02 | Ignition device for a rimfire cartridge |
Country Status (1)
Country | Link |
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EP (1) | EP4086564B1 (en) |
Citations (3)
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/en active Active
Patent Citations (4)
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 |
---|---|
EP4086564B1 (en) | 2024-01-31 |
EP4086564C0 (en) | 2024-01-31 |
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