GB879089A - Trigger mechanism for automatic firearms - Google Patents
Trigger mechanism for automatic firearmsInfo
- Publication number
- GB879089A GB879089A GB25858/60A GB2585860A GB879089A GB 879089 A GB879089 A GB 879089A GB 25858/60 A GB25858/60 A GB 25858/60A GB 2585860 A GB2585860 A GB 2585860A GB 879089 A GB879089 A GB 879089A
- Authority
- GB
- United Kingdom
- Prior art keywords
- hammer
- trigger
- sear
- pin
- arm
- 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
Links
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
- F41A19/03—Shot-velocity control
-
- 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
- F41A19/44—Sear arrangements therefor
-
- 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
- F41A19/46—Arrangements for the selection of automatic or semi-automatic fire
Abstract
879,089. Trigger mechanisms for automatic firearms. FRANCHI, S.p.A., LUIGI. July 25, 1960 [Aug. 5, 1959], No. 25858/60. Classes 92 and 119. Relates to a trigger mechanism for automatic firearms provided with a change-fire mechanism and having a reciprocating breech bolt 20 Figs. 1, 2 carrying a firing pin 21 which is actuated by a pivotal hammer 17. According to the invention a slow rate of fire is achieved by the provision of a delay mass 18 pivoted at 12 co-axially with the hammer 17 and urged forwardly by a push rod 23 and spring 25 towards the breech bolt 20, the delay mass 18 being locked in the rearward position during recoil by a spring urged pawl 32 which engages a tooth 18b on the mass 18. The pawl 32 is fixed to a lever arm 33 cooperating with an unlocking lever 35 pivoted also at 12 and adapted to engage a cam 36 on the bolt 20 immediately before closure thereof, which cam moves the lever 35 to disengage the pawl 32 from the tooth 18b, thus unlocking the delay mass 18. The hammer 17 carries a pin 26 on which is pivotally mounted one end of another spring-urged push rod 27 which, like the rod 23, freely passes through an opening in the trigger casing 10, the arrangement of pivot 12, pin 26 and the opening in the back plate 10 forming a toggle link, such that in the position of the pin 26 as shown in Fig. 1, the spring 28 on the rod 27 tends to swing the hammer clockwise, while in the raised position of the pin 26, as shown in Fig. 2, the hammer tends to swing anti-clockwise. The hammer 17 carries a lateral finger 17b protruding into the path of the mass 18, the arrangement being such that towards the end of the forward movement of the mass 18, a surface 30 on the mass 18 meets the finger 17b and swings the hammer forwardly to take the pin 26 across the dead-centre position, thus permitting the spring 28 to swing the hammer towards the firing pin 21. A trigger 40 and a sear 41 are pivoted on a pin 16, the trigger having a rear arm 44 co-operating with a charge-fire selector 45 comprising a rotatable pin with a diametral incut 46. The sear 41 is formed with an elongated slot 47 through which the pin 16 passes thus permitting a pivotal motion and also a motion of translation. The sear is urged forwardly by a spring-pressed plunger 50 housed in the body of the trigger. As soon as the deadcentre position is passed and the hammer swings forwardly, a hammer tooth 17c engages an arm 41a of the sear 41 and the latter recedes against the action of the plunger 50 and comes to rest in the position shown in Fig. 2 and the trigger mechanism is cocked. In the "safe" position- Fig. 1, the trigger arm 44 bears against the cylindrical part of the selector 45, thus locking the trigger. By turning the selector to the position shown in Fig. 2 the trigger arm 44 partially penetrates into the cut 46 and by pulling the trigger 40, a trigger tooth 51 engages the rear arm 41b of the sear and rotates the sear until the hammer tooth 17c disengages from the sear arm 41a and the spring 28 swings the hammer 17 against the firing pin. Simultaneously the sear 41 slides forwardly under the action of the plunger 50 thus removing the rear arm 41b from the path of the tooth 51. On firing the breech bolt recoils, cocking is effected and the hammer notch 17c strikes against the arm 41a moving back the sear, the rear arm of which slides on a step 52 and comes to rest against but below the tooth 51 locking the hammer. To fire another shot, the trigger must be released, thus allowing the sear 41 to slide backwards to the position shown in Fig. 2 when firing can then be effected. For continuous fire the selector 45 is further rotated to the position shown in Fig. 4. There the trigger arm 44 can penetrate completely into the cut 46 and in this condition the sear 41 is tilted by the trigger step 52 so as to remove the front arm 41a of the sear away from the path of the hammer tooth 17c and the hammer will not be stopped by the sear so long as the trigger remains pulled.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
IT1316959 | 1959-08-05 | ||
IT3029708X | 1960-02-22 |
Publications (1)
Publication Number | Publication Date |
---|---|
GB879089A true GB879089A (en) | 1961-10-04 |
Family
ID=32396082
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB25858/60A Expired GB879089A (en) | 1959-08-05 | 1960-07-25 | Trigger mechanism for automatic firearms |
Country Status (5)
Country | Link |
---|---|
US (1) | US3029708A (en) |
CH (1) | CH371364A (en) |
FR (2) | FR1263722A (en) |
GB (1) | GB879089A (en) |
LU (1) | LU39048A1 (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0897522A1 (en) * | 1996-05-09 | 1999-02-24 | Defense Technologies Limited | Firing rate regulating mechanism |
Families Citing this family (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3577827A (en) * | 1969-01-27 | 1971-05-04 | Olin Mathieson | Trigger mechanism |
US4023465A (en) * | 1975-06-27 | 1977-05-17 | Inskip Thomas C | Firearm |
US4056038A (en) * | 1976-05-12 | 1977-11-01 | Rath Hans M | Dual purpose semi-automatic convertible rifle |
DE3671663D1 (en) * | 1985-03-22 | 1990-07-05 | Beretta Armi Spa | SHOOTING LIMITER FOR SERIAL FIRE ON AUTOMATIC ARMS. |
IT1259862B (en) * | 1992-01-14 | 1996-03-28 | Beretta Armi Spa | TRIP MECHANISM FOR SEMI-AUTOMATIC AND AUTOMATIC FIREARMS |
DE19626077C2 (en) * | 1996-06-28 | 2000-10-26 | Heckler & Koch Gmbh | Trigger device for a self-loading firearm with conversion to continuous fire |
US10267585B2 (en) * | 2016-01-28 | 2019-04-23 | Fostech, Inc. | Trigger having a movable sear and firearms incorporating same |
US10222161B2 (en) * | 2016-05-06 | 2019-03-05 | In Ovation Llc | Trigger Assembly |
US10753698B2 (en) * | 2017-05-12 | 2020-08-25 | E3 Arms, Llc | Trigger system with safety |
US11054204B2 (en) | 2019-10-04 | 2021-07-06 | Smith & Wesson Inc. | Trigger return spring mechanism |
-
1960
- 1960-07-25 GB GB25858/60A patent/GB879089A/en not_active Expired
- 1960-07-26 CH CH851360A patent/CH371364A/en unknown
- 1960-08-02 FR FR834723A patent/FR1263722A/en not_active Expired
- 1960-08-04 LU LU39048D patent/LU39048A1/xx unknown
-
1961
- 1961-02-15 US US89539A patent/US3029708A/en not_active Expired - Lifetime
- 1961-02-21 FR FR853350A patent/FR1280477A/en not_active Expired
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0897522A1 (en) * | 1996-05-09 | 1999-02-24 | Defense Technologies Limited | Firing rate regulating mechanism |
EP0897522A4 (en) * | 1996-05-09 | 2001-10-31 | Defense Technologies Ltd | Firing rate regulating mechanism |
Also Published As
Publication number | Publication date |
---|---|
FR1280477A (en) | 1961-12-29 |
US3029708A (en) | 1962-04-17 |
LU39048A1 (en) | 1960-10-04 |
CH371364A (en) | 1963-08-15 |
FR1263722A (en) | 1961-06-09 |
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