US1118331A - Automatic firearm. - Google Patents

Description

J. H. CARL. AUTOMATIC FIREARM.

APPLICATION FILED APR-4, 1914. 7 1,118,331. Patented NOV. 24, 1914.

Quvehiz J11 CarZ, wi/bweooeo snares an 155 rare AU'romA'ric FIREARM.

Specification of Letters Patent.

Patented Nov. 24, 1914.

Application filed Aprils, 1914. Serial No. 329,490.

To all whom it may concern:

Be it known that I, J OHN HOWARD CARL, a citizen of the United States, residing at Gilroy, in the county of Santa Clara and State of California, have invented certain new and useful Improvements in Automatic Firearms, of which the following is a specification,

This invention relates to firearms and has special reference to a trigger mechanism therefor.

One object of the invention is to provide a trigger mechanism combined with a hammer mechanism and hammer lever so arranged that the sear of the trigger mechanismwill be released from the remainder of, the trigger mechanism by effective operation of the hammer lever.

Another object of the invention is to provide for an improved form of straight pull trigger.

A third object of the invention is to provide for animproved means of demounting the hammer mechanism.

\Vith the above and other objects in view the invention consists in general of certain novel details of construction and combination of parts hereinafter fully described, illustrated in the accompanying drawings, and specifically claimed.

In the accompanying drawings, like characters of reference indicate like parts in the several views, and :Figure 1 is a side ele- \"ation,- partly in section, showing the improved firearm, the parts in section disclosing the improvement therein. Fig. 2 is a top plan View of the trigger. Fig. 3 is a side elevation of the sear, the view being taken from the side opposite Fig. 1. Fig. 4 is an enlarged detail section through the trigger showing the sear in elevation. Fig. 5 is a bottom plan view of the butt of the firearm.

In carrying out the objects of this invention thereis provided the usual frame 10,

the frame having certain peculiarities but serving to support the rest of the parts. Secured to this frame in any preferred manner is the barrel 11. This frame is provided with a vertically extending passage reaching from the base or butt of the frame to the barrel and indicated at 11. Within this passage is provided the magazine guide way 12 wherein fits the magazine 13, these parts being of the usual type. At one side of the passage 11 there is provided a cylindrical passage or bore 14 having its lower end enlarged and threaded as indicated at 15 so that a plug 16 may be screwed therein for purposes hereinafter to be described. The device is provided with the usual magazine catch 17, the latter not forming part of this invention. The passage 11 is extended rearwardly to provide a rearwardly opening branch 18 and in this rearwardly opening branch is pivoted the hammer 19 which is provided with the usual-sear notch 20' and also with the hammer lever notch 21. The upper end of a substantially arcuate ham mer push-bar 22 is received in;this notch 21 while the lower end of this hammer pushbar is provided with a circular head 23 which is movable in the bore 14. The plug 15 carries an elongated pin 24 and surround ing this pin is a coiled spring 25 which forms the firing spring or hammer spring for the device, the upper end of said spring bearing against the under side of the head 23. livoted in the walls of the frame 10 by means of the journals 26 there is a sear 27 which is a1'ranged,wl1en the hammer 19 is drawn back. to engage in the notch 20. This sear has shoulders 28 adjacent the journals and surrounding one of these shoulders is the sear spring 29 which has an off-set end 30 hearing against the rear side of the lower part of the sear and consequently urging the upper part of the sear into engagement with the hammer 19. The other end of this spring 29 has an off-set portion 31 which bears against a lug 32 on the side of the frame thus keeping the sear spring constantly under tension. Extending from one side of this sear at the bottom thereof is also a pin 38 for purposes hereinafter to be described.

The trigger consists of a substantially rectangular body portion 34: which has its forward end as at 35 to form a finger grip and on one side of this body portion 34 there is provided a rearwardly extending arm 36 which works a ainst the side ofthe passage 11, the body of the trigger working in a forwardly extending branch 37 of said passage 11. The other side of this body portion 34 is cut away to provide recess 38 and extending from this recess is an opening 39 to receive the pivot pin 40 of a rocking arm 41 which extends rearwardly parallel to the arm 36, said rocking arm being of T-shape and having its rearward end normally urged downward by means of a spring 42 posi- I tioned between the bodv 34 and the head of said T. Moreover this arm 41 is provided adjacent its rearend with a notch 43 engageable with the pin 33. In addition to this the arm 41 is provided with an inwardly extending pin 44 which lies in such position as to be in contact with the lever 32 when the trigger is drawn back. In order to normally hold the trigger forward there is provided the usual trigger spring 45 which engages against a suitable fixed frame at its rear end and against the trigger at its forward end.

In the operation of the device let it be supposed that the hammer 19 is drawn back to firing position. Then the upper end of the sear will engage in the notch 20 and the drawing back of the hammer will move the push-bar 22 downward so that the firing spring will be compressed. 'The firing spring will be held in this position by the action of the searuntil the trigger is pulled back by the finger pressing on the part 35. Then the sear will be moved out of the notch 20 because of the engagement of the notch or recess 43 with the pin 33 tilting the sear about the pivot 26 and causing the lowerend. of the sear to move backward and the upper end to move forward. At the same time the pin 44 will be brought into engagement with the push-bar 22 so that when this push-bar rises under the influence of the spring 25, the hammer upon release from the sear being free to move, the

arm 41 will be raised up so that the notch or recess 43 will be out of engagement with the pin 33, thus the sear can instantly fall back into the position shown in Fig. 1 ready for further engagement with the notch 20.

By this means when the hammer 19 under the influence of the usual recoil arrangement the sear drops into the notch 20 and holds the hammer in firing position. Meanwhile if the trigger has been held back the sear is not affected by such retraction of the trigger. It is necessary to allow the trigger to move forward under the influence of the spring 45 whereupon the notch 43 engages the pin 33 so that upon a second retraction of the trigger the hammer is again released and the operation repeated. When it is desired to disassemble the parts 22, 24 and 25 it is only necessary to unscrew the plug 16 which permits all of these parts to loosen up and thus render the disassembling very easy. There has thus been provided a simple and eflicient device of the kind described and of the character specified.

Having thus described the invention, what is claimed as new, is

1. In a firearm, a frame, a hammer mounted in said frame, a sear arranged to hold the hammer in releasably cocked position, a trigger, an arm pivoted to the trigger releasably engaging said sear, a push-bar operating the hammer, said push-bar bearing against the end of the trigger arm and adapted to raise said arm and means for operating the push-bar.

2. In a firearm, a frame, a hammer rotatably mounted in said frame and provided with a sear notch, a sear pivoted in said frame and arranged to engage the notch when the hammer is cocked, a curved pushbar engaging said hammer a firing spring arranged to move said push-bar into firing position and a trigger provided with a pivoted arm releasably engaging said sear, said arm being adapted to move upwardly to release position by the direct action of the curved portion of said push-bar during the firing movement.

3. In a firearm, a hammer, a frame, a sear pivoted in said frame and provided with an arm having a lateral projection, a trigger including a body having a rearwardly extending arm pivoted thereto, said arm being provided with a notch engaging the projection on the sear, a spring releasably holding the notch and projection in engagement, a curved push-bar operating said hammer, a firing spring arranged to operate said push-bar and a pin projecting from said .trigger arm and arranged to lie in the path of the push-bar when the trigger is pulled whereby to release the arm from the sear.

4. In combination with a hammer operat ing mechanism, a trigger comprising a finger member, an arm integral with and extending rearwardlv from said finger member, a second arm fitting within a recess provided in said finger member, a pin projecting from the inner side of the second arm adapted to enter a slot in the finger member, a spring normally holding the pivoted arm in a downwardly projecting position and a notch provided in the'second arm co6perat ing with the hammer mechanism.

In testimony whereof I afiix my signature in presence of two witnesses.

' JOHN HOWARD CARL.

Witnesses:

A. D. ROOCA, H. EMLAY.

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