US2921502A - Sear release for an automatic firearm - Google Patents

Sear release for an automatic firearm Download PDF

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Publication number
US2921502A
US2921502A US654374A US65437457A US2921502A US 2921502 A US2921502 A US 2921502A US 654374 A US654374 A US 654374A US 65437457 A US65437457 A US 65437457A US 2921502 A US2921502 A US 2921502A
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US
United States
Prior art keywords
follow
sear
receiver
pin
breech
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
US654374A
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English (en)
Inventor
Amsler Rudolf
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.)
Schweizerische Industrie Gesellschaft
Original Assignee
Schweizerische Industrie Gesellschaft
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 Schweizerische Industrie Gesellschaft filed Critical Schweizerische Industrie Gesellschaft
Application granted granted Critical
Publication of US2921502A publication Critical patent/US2921502A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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
    • F41A19/42—Mechanical firing mechanisms, e.g. counterrecoil firing, recoil actuated firing mechanisms having at least one hammer
    • F41A19/43—Mechanical firing mechanisms, e.g. counterrecoil firing, recoil actuated firing mechanisms having at least one hammer in bolt-action guns

Definitions

  • the present invention relates to an automatic firearm having a breech head and a follow-up member movable relative thereto under the action of a closure spring wherein the percussion pin is guided movably.
  • the one according to the present invention is distinguished by a spring-loaded hammer for the percussion pin which is controlled by a sear, in turn controlled by the follow-up member.
  • Fig. 1 is a partial longitudinal section of one embodiment
  • Fig. 2 is a corresponding part section of a modified embodiment
  • Fig. 3 is a section on the line 3-3 of Fig. 1.
  • FIG. 1 denotes the elongated receiver which at its forward end carries the barrel 14 and is closed at its rear by the cap piece 7.
  • the multipiece breech bolt or body is guided axially movably under the action of the blow back gas pressure when firing a cartridge on the one hand, and of a closing spring 6 on the other hand.
  • This breech bolt or body comprises a breech head 2 and a follow-up member 3.
  • the percussion pin 4 is resiliently coupled to the followup member by a spring 5, by which it is retracted and pushed back.
  • the breech head 2 has mutually opposite recesses 8 wherein locking rollers 9 are housed transversely movable with respect to the longitudinal axis of the receiver. The same can be forced by the frusto-conieal forward end of the follow-up member 3 outward in a lateral direction into the locking grooves 10, when this end is moved forward.
  • a control groove 11 running in the longitudinal direction is provided which is closed at its rear end by an abutmentor shoulder-face 13.
  • the receiver is provided with an opening 13' in registry wtih the groove 11 for the passage of the T-headed portion of the connector 12.
  • a compression spring 17 bears on a sear plate 19 which is pivotally mounted at 21 and against the forward end of which abuts a further nose 18 of the connector 15.
  • the multi-piece breech bolt or body is in its rear end position into which it has been brought by the blow back gas pressure from a fired cartridge.
  • the recoil closing spring 6 is loaded, and the nose 12 of the sear is at the forward end of the control groove 11.
  • Und the pressure of the recoil closing spring the breech body moves forward into battery position, inserting thereby a cartridge in the usual manner into the barrel 14.
  • the follow up member which is movable relative to the head piece 2, reaches the forward end position shortly after the latter and forces as far as necessary the rollers 9 into the locking grooves 10.
  • the abutmentor shoulder-face 13 abuts the nose 12 of the connector 15.
  • the construction described assures that the follow-up piece 3 must have reached a predetermined forward position before the hammer is released.
  • the multi-part breech bolt or body as a whole is locked by the locking rollers 9 before the firing of a shot takes place when the breech body is not completely locked, for example owing to fouling.
  • the spring 6 could alternatively be replaced by a pair of springs 6a lying on diametrically opposite sides of the percussion pin 4 and acting directly on the follow-up member 3.
  • An automatic firearm comprising in combination: a receiver, a multi-part breech bolt reciprocab'ly mounted in said receiver including a breech head and a follow-up member slidably mounted in said breech head, a recoil spring biasing said follow-up member in a direction toward said breech head, a firing pin movably guided in said follow-up member and extending through a central bore of said breech head, a pin and slot connection between said firing pin and follow-up member to permit limited movement therebetween, -a firing pin retracting spring located in said follow-up member and exerting rearward pressure on said firing pin, a sear plate pivotally connected to said receiver having a sear, a connector 3 also pivoted to said receiver and having a-T-shaped head with one portion of said T-shaped head extending through an opening in said receiver to be engaged by said follow-up member when the same reaches the limit or its forward travel and the other end ofsaid T-shaped head to simultaneously engage said sear plate, a hammer
  • An automatic firearm comprising in combination:
  • a multi-part breech bolt including a breech head and a follow-up member movably mounted .with respect to said receiver and'to one another, a recoil “spring biasing the follow-up member toward said breech head, a firing pin movably guided in said follow-up member and extending through a central bore of said breech head, a pin and slot connection between said firing 'pin and follow-up member, a hammer pivoted to saidreceiver having a scar notch, a spring for urging 'said "hammer into forcible striking engagement with said fir.- "ing pin, a sear plate pivoted to said'receiver having a scar adapted to be received in'said notch, spring'means for holding said sear in said notch, a T-shaped connector including an elongated arm pivoted to said receiver and having oppositely extending extensions on one end thereof "3.
  • An automatic firearm comprising in combination: a receiver, a multi-part
  • a recoil spring biasing said'follow-up member toward said breech head, a firing 'p'in'movably guided in said follow-up member and extending through a central bore of said breech head, aspring loaded hammer pivoted to said receiver adapted to strike the rearend of said'firing pin, a searplatepivoted to saidreceiver having'a sear yieldingly urged into engagement with a sear' not'chin said hammer to hold the same in its retracted-position, and a T-shaped connector pivoted to said receiver having an enlarged end'portion with oppositely directed'extensions one of.

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Portable Nailing Machines And Staplers (AREA)
US654374A 1956-08-28 1957-04-22 Sear release for an automatic firearm Expired - Lifetime US2921502A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CH819228X 1956-08-28

Publications (1)

Publication Number Publication Date
US2921502A true US2921502A (en) 1960-01-19

Family

ID=4539252

Family Applications (1)

Application Number Title Priority Date Filing Date
US654374A Expired - Lifetime US2921502A (en) 1956-08-28 1957-04-22 Sear release for an automatic firearm

Country Status (5)

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US (1) US2921502A (enrdf_load_html_response)
BE (1) BE556487A (enrdf_load_html_response)
CH (1) CH347106A (enrdf_load_html_response)
FR (1) FR1170982A (enrdf_load_html_response)
GB (1) GB819228A (enrdf_load_html_response)

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3101648A (en) * 1959-01-14 1963-08-27 Walther Fritz Automatic firearm with means for maintaining slow rate of firing
US3346982A (en) * 1964-10-29 1967-10-17 Rheinmetall Gmbh Bolt assembly for semi-automatic firearms
US5900576A (en) * 1994-09-08 1999-05-04 Gabriel; Franz Semi-rigid locking system for a firearm
US5983774A (en) * 1997-03-07 1999-11-16 Mihaita; Ion Machine gun
US6715399B2 (en) * 2002-02-14 2004-04-06 Rolin F. Barrett, Jr. Firearm bolt assembly
US20050257682A1 (en) * 2003-12-03 2005-11-24 Jeffrey Hajjar Method and apparatus for an action system for a firearm
US20080121096A1 (en) * 2002-03-14 2008-05-29 Jeffrey Hajjar System and method for loading and feeding a shotgun
USD611111S1 (en) 2006-08-17 2010-03-02 Snake River Machine, Inc. Shotgun
US8807010B2 (en) 2011-08-24 2014-08-19 Merkel Jagd-und Sportwaffen GmbH Pistol with barrel locking device
US20150330727A1 (en) * 2014-05-15 2015-11-19 Alliant Techsystems Inc. Firearm with reciprocating bolt assembly
US20230221086A1 (en) * 2022-01-11 2023-07-13 Daniel Patrick Moore Semi-automatic shotpistol shell pistol

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1095738A (en) * 1914-03-16 1914-05-05 Carl Roestel Sliding breech-block for recoil-operated firearms.
US1096679A (en) * 1911-11-28 1914-05-12 Rheinische Metallw & Maschf Breech mechanism for automatic firearms.
US2215470A (en) * 1938-03-14 1940-09-24 Melvin M Johnson Automatic firearm
DE945819C (de) * 1938-06-03 1956-07-19 Paul Kurt Johannes Grossfuss Schlossverriegelung fuer Rueckstosslader mit gleitendem Lauf

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1096679A (en) * 1911-11-28 1914-05-12 Rheinische Metallw & Maschf Breech mechanism for automatic firearms.
US1095738A (en) * 1914-03-16 1914-05-05 Carl Roestel Sliding breech-block for recoil-operated firearms.
US2215470A (en) * 1938-03-14 1940-09-24 Melvin M Johnson Automatic firearm
DE945819C (de) * 1938-06-03 1956-07-19 Paul Kurt Johannes Grossfuss Schlossverriegelung fuer Rueckstosslader mit gleitendem Lauf

Cited By (22)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3101648A (en) * 1959-01-14 1963-08-27 Walther Fritz Automatic firearm with means for maintaining slow rate of firing
US3346982A (en) * 1964-10-29 1967-10-17 Rheinmetall Gmbh Bolt assembly for semi-automatic firearms
US5900576A (en) * 1994-09-08 1999-05-04 Gabriel; Franz Semi-rigid locking system for a firearm
US5983774A (en) * 1997-03-07 1999-11-16 Mihaita; Ion Machine gun
US6715399B2 (en) * 2002-02-14 2004-04-06 Rolin F. Barrett, Jr. Firearm bolt assembly
US20080121096A1 (en) * 2002-03-14 2008-05-29 Jeffrey Hajjar System and method for loading and feeding a shotgun
US20050257682A1 (en) * 2003-12-03 2005-11-24 Jeffrey Hajjar Method and apparatus for an action system for a firearm
US7299737B2 (en) * 2003-12-03 2007-11-27 Snake River Machine, Inc. Method and apparatus for an action system for a firearm
USD611111S1 (en) 2006-08-17 2010-03-02 Snake River Machine, Inc. Shotgun
US9488431B2 (en) 2011-08-24 2016-11-08 Merkel Jagd— & Sportwaffen Gmbh Pistol with barrel locking device
US8807010B2 (en) 2011-08-24 2014-08-19 Merkel Jagd-und Sportwaffen GmbH Pistol with barrel locking device
US20150330727A1 (en) * 2014-05-15 2015-11-19 Alliant Techsystems Inc. Firearm with reciprocating bolt assembly
US9513076B2 (en) * 2014-05-15 2016-12-06 Savage Arms, Inc. Firearm with reciprocating bolt assembly
US9599417B2 (en) 2014-05-15 2017-03-21 Savage Arms, Inc. Extractor mechanism for firearm
US20170122685A1 (en) * 2014-05-15 2017-05-04 Vista Outdoor Operations Llc Semiautomatic firearm
US9810496B2 (en) 2014-05-15 2017-11-07 Savage Arms, Inc. Semiautomatic firearm
US10788277B2 (en) * 2014-05-15 2020-09-29 Savage Arms, Inc. Semiautomatic firearm
US11713933B2 (en) * 2014-05-15 2023-08-01 Savage Arms, Inc. Semiautomatic firearm
US12152854B2 (en) 2014-05-15 2024-11-26 Savage Arms, Inc. Semiautomatic firearm
US20250123063A1 (en) * 2014-05-15 2025-04-17 Savage Arms, Inc. Semiautomatic firearm
US20230221086A1 (en) * 2022-01-11 2023-07-13 Daniel Patrick Moore Semi-automatic shotpistol shell pistol
US12111128B2 (en) * 2022-01-11 2024-10-08 Daniel Patrick Moore Semi-automatic shotpistol shell pistol

Also Published As

Publication number Publication date
GB819228A (en) 1959-09-02
FR1170982A (fr) 1959-01-21
CH347106A (de) 1960-06-15
BE556487A (enrdf_load_html_response)

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