US2351976A - Automatic firearm - Google Patents

Description

June 20, 1944. J. KoucKY AUTOMATIC FIREARM Filed Deo. e, 195s `functions I obtain a Patented June 20, 1944 AUTOMATIC FIREARM Josef Koucky, Brunn Bohemia; vested in the Alien Property Custodian Application December 6, 1939, Serial No. 307,807 l In Czechoslovakia December 10, 1938 2 Claims.

My invention relates to automatic firearms which have a breech block actuated ,and controlled by a breechblock carrier.

-It is an object of this invention to provide for such a Weapon of simple construction vwhich is Aespecially suitable for automatic rifles.

It is anotherfobject of my invention to provide for such a weapon which consists of a relatively small number of parts.

Other objects of the invention will appear as the specication i proceeds.

According to the invention a recuperator `spring is so arranged in connection with the of the firearm as to actuate the movements of the striking member of the firing pin and also to actuate, during the forward movement, the Abreechbiock carrier until the locking position of the breech block is reached.

` By thus using the recuperator spring for two weapon of simple design, the individual parts of which may be large whereby the strength and the precision of operation of the weapon are increased.

breech mechanism Preferably the striker is mounted on the breech block carrier and so arranged as to transmit, during the forward movement, the force of the recuperator spring to the breech block carrier, and to be actuated by the same spring for its striking movement at the end of the forward movement of the breech block. In this manner the action cf the striker depends directly on the position of the breech block carrier, so that a or a belated firing with prematurely breech is prevented.

According to a preferred embodiment of the invention the striker may have the form of a lever which is hinged by one end to the breech block carrier, while its other end cooperates, before the end of the forward stroke, with a stop about which the striking lever tilts so as to recede relative to the breech block, while during this relative receding movement the breech block carrier finishes its forward stroke and simultaneously locks the breech block. Preferably this stop forms part of the sear, which is actuated by the trigger with the aid of a connecting rod.

In the drawing aixed to this specification and forming part thereof a self-charging ride embodying my invention. and provided with a tilting breech block is illustrated diagrammaticaily by Way of example.

In the drawing:

Fig. 1 is a longitudinal section of 'the rifle with the parts in firing position.

Fig. 2 shows,.on an enlarged scale, the cocked striker mechanism before firing.

Referring to the drawing, I is the breech case, 2 the barrel, 3y the triggercase and 4 the butt. The cases I and 3 are connected by means of bolts 5 and 6, V

In case I the breech mechanism is arranged for freesliding movement. It consists of the breech block carrier 1, the tilting breech block 8 and the hammerlike striking member 9 to which latter is attached, by means of stud I0, the recuperator rod I I, the rear end of which rests on an abutment member I2 acted upon by the recuperator spring I3, Vwhich is arranged in the tube 2'! held in the case 3 by the butt 4; The striker 9 is a leverhinged to the breech block carrier 1 by meansof the pin 24 and formed with a head 23 acting on the ring pin SI accommodated; in the, breech block. 32 is the extractorfor thefempty cartridge cases.

The breech block. carrier, which is formed with a tooth 29,` cooperating` with the tongue 39 of the breech block 8, is connected with the piston rod of thegasfpressure loading-device (not shown). In thelocking position the breech block 8 abuts against a cross piece 34 below which is removably` during the movement of the breech block 8, passes through a, longitudinal groove 36 in the bottom face of this block. The ejector is held in the active position by the spring 31 of the lever 38 locking the magazine I9, which is a three-armed lever, the arm 38 being applied against the magazine I9, while arm 33" serves for operation, and arm 38" is the supporting arm.

4I is the ejector opening, through which the magazine I9 may also be lled with cartridges from belts.

The trigger mechanism comprises the forked trigger I 6 pivoted to pin I1. Both arms of the fork -carry at their ends locking teeth I8, which serve for locking the manually cocked breech block carrier 1, during the filling of the cartridge magazine I9 from belts or during an exchange of such belts. The trigger I-6 is connected by means of a connecting rod 20, arranged between the arms of the fork, with the sear 2| extending into the path of the end of the striking hammer 9. Sear 2I is free to rotate about stud E and is acted on by spring 22. The entire trigger mechanism is acted upon by spring 25 which surrounds a guiding bolt arranged,fthe,eject0r 35, which,

ejector opening 4I.' The vthe striker hammers is locking position wherein' 26 extending through an aperture in a short arm of the connecting rod 20.

In the case 3 of the trigger mechanism is arranged a stop I4, acted upon by the spring I5, free for displacement on the connecting stud 5.

The weapon operates as follows:

When a shot is iired, the gas pressure acts upon the piston which is connected with the breech block carrier "1 l'nd I-.drifves this movement the tooth 29 ofthe breech block carrier 'I grips the nose of the breech block 8 lifting 34 and is carried along 'I which compresses the recuperator springtl'by way of the complete damping off" it rearwards. .Durin'g' Y it from the locking position, whereby the v breech block -8 is disengaged from the cross `-piece by the breech block'c'arrier "l5 striker 9, the recuperator rod IIhand the abutment member I2. -Just-,before the-,rear-V I striker 2I and thus effects the ring of the `cartridge. Now the breech block carrier starts on its rearward movement, during whichitjreleases the breech block, while the free end of the striker 9 slides along the cam face 2 I of the sear, which .is tilted against the' action ofthe spring 22. A slit 46, through which passes stud 41 of the trigger,

allows the connecting rod 20 to be shifted during this" 'tilting movement." The'breech'l block carrier thereupon finishes itsrrearward'movernent,

and the Whole procedure is gone through once more.

. The `Weapon `described above and illustrated in the" drawing is only an example of the invention, rand' the details; -for instance the arrangement of theY breech and trigger mechanisms, may be varied various respects within the scope of the invention 'I wish it to be understood that I do not desire to the iwan ofeasirigja. 5

At'tl'ilsmment, the striker begins to act las'aone-arme'd levenresting on the sear 2I and Vris tiltedv by the` action lof the recuperator-s'pring vI3 into the'position shown in1'ig..2. During this movement; the breechblockgcarrier I finishes its Yforward.Irloveirre'x1t...during.which.the cam; face v42 .movesthe breech block ,8 into the it rests on the" trosspiee 34. The .head 2 3 oithenstriker recedes during .this movement. from thef firing )ping 3 I and :the 'striker is cocked. 5 On',`pulling the triggerl; the

' r o d 20 counter'to Vthe actionpf .thespring 22 Aso as to release.; the 'strikerf which; under. the pressure' of the' recuperator spring; ftilts 'about the pin v2'4 wuntil head 23 strikes the projecting end of they@ Vbe llimited to the exact details of construction shown andy described, for obvious modications willoccur toa l1person skillegrin the art.v f

I claim:

mounted to reciprocatebackward Yand forward `in said case, a. reach block movablebysaldarrier betweena lockedandunl k.. sipositidnwhle Said carrier is traversing a f orwarglportionor its path of movement., and., .movablervithsed .carrier during the remainder o f 1' itsmovernent, a iiring pin mounted in Said bloclsfgstrikinslever riveted on. said carrier ancienne.aetsllinspbn ,arransedftd strikgsaid ,firing nin.- mans..f0r.m9v ine.. .the f. carrier.. backward.. onfring. vmeans ,for moving said carrier f orrvsnard and i or actuating saidstrikercornprising arecuperator spring and i Stop Serves as@ 'a connecting between. Sfafd spring. and Striking lever at a point of the lever removed vfrornwits pivot. said.msg bensiormedwith a Stop `engaging the forward part or the fr e'eepg brthe ,striklever whenv the y breech block is 'in' y locked position 2.. The rearrn set forth'in'claim 1v'whereinfsaid lockingimeans andl is f provided with a .forwa d breech. blockA is moved by said `carrier toward locked and unlokegnositiwe

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