Firearms – Firing mechanism – Rearward sliding breech bolt
Patent
1986-05-21
1987-11-17
Kyle, Deborah L.
Firearms
Firing mechanism
Rearward sliding breech bolt
42 7001, F41D 1102, F41C 1900, F41C 1700
Patent
active
047064013
DESCRIPTION:
BRIEF SUMMARY
This invention relates to a trigger mechanism for a pistol with a trigger, which when activated releases a spring-loaded hammer, and also to a combined locking and safety device for a weapon with a trigger which acts upon a disconnector which, via a gripper, a lever and a hammer retainer, releases the hammer.
Hitherto known trigger mechanisms demand a relatively strong force and long travel of the moving parts in order to be able to function satisfactorily and safely. This is due to the high degree of friction which exists between the strongly spring-loaded parts which must be mutually displaced in order for the release and thus the disengagement of the hammer to take be effected. This gives rise to difficulty in achieving the desired and precise amount of pull required on the trigger, and also makes it difficult to bring about sufficiently short travel of the moving locking parts. Thus, since the trigger pull is of considerable importance to the accuracy of the pistol, the marksmanship capable of being achieved is affected.
Moreover, hitherto known safety devices for weapons have been limited to arrangements which prevent movement of the trigger mechanisms. They do not provide for locking of the parts of the weapon against separation, and they do not constitute a lock which provides the security that a part is required in order to unlock and lock the weapon after the insertion of the part in the weapon.
The object of the present invention is to overcome the deficiencies of the hitherto known trigger mechanisms, and this object is achieved when the mechanism includes a trigger-actuated lever which is suspended at the rear on the upper part of the pistol, and is fixedly connected to a pivotal axle having a projection which can engage with a projection on a gripper, said gripper being pivotally mounted on an overlying axle and having a projection which can engage with a recess in the exterior of the hammer. This construction constitutes a lever system with a high exchange ratio between the trigger and the release part for the hammer. This means that only a small load need be applied to the one end of the lever to turn the other end at the axle and thus release the hammer. Consequently, the pressure required on the trigger is considerably relieved, so that only a minimal movement of the trigger and a minimal force is required to release the hammer.
As presented in claim 2, by releasing the front end of the lever by means of a pivotally mounted gripper actuated by the trigger, it is possible to employ the mechanism as a dry-run training unit, in that the lever can be cocked and released by the trigger without the hammer being cocked.
As presented in claim 3, by providing the gripper with a pivotal coupling, disconnector, the possibility is created of ensuring that the trigger is capable of functioning when the slide is forward, without any friction or resistance arising in the trigger mechanism.
Moreover, as presented in claim 4, it is expedient for the disconnector to have an outwardly extending stud which engages with a recess in the slide, thus ensuring that coupling can take place in this and only in this position.
The present invention will now be described in more detail and with reference to the accompanying drawings, where
FIG. 1 shows the trigger mechanism in the safety-off and cocked position,
FIG. 2 shows the coupling, the disconnector,
FIG. 3 shows the pistol in the safety-on and locked position,
FIG. 4 shows the pistol with the slide in the rearmost position,
FIG. 5 showing the present invention along here B--B of FIG. 6; all
FIG. 6 shows the present invention along here A--A of FIG. 5.
As will be seen from FIGS. 1-4, which show one embodiment of the present invention, the trigger mechanism is built into the stationary part of the pistol. The trigger 2, see FIGS. 1 and 3, is provided with an overlying bush whch can be secured in a movable manner to a trigger arm 3, the front end of which is mounted on an axle 4. This unit is connected to the remaining part of the mechanism via a disconnector or co
REFERENCES:
patent: 2464427 (1949-03-01), Wilson
patent: 2846925 (1958-08-01), Norman
patent: 2959107 (1960-11-01), Srurtevant
patent: 3060810 (1962-10-01), Hillberg
patent: 3128570 (1964-04-01), Browning
patent: 3889412 (1975-06-01), Filecci
patent: 3950876 (1976-04-01), Wild et al.
EP, A2, 0025 518, (Kepplinger), 3/25/81.
CH, A5, 626,987, (Beretta), 12/15/81.
CH, A4, 620,763, (Walther), 12/15/80.
SE, B, 368,081, 2/25/72.
Kyle Deborah L.
Parr Ted L.
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