US1376456A

US1376456A - Automatic firearm

Info

Publication number: US1376456A
Application number: US356354A
Authority: US
Inventors: Moore Robert Alexander
Original assignee: Individual
Current assignee: Individual
Priority date: 1920-02-04
Filing date: 1920-02-04
Publication date: 1921-05-03
Anticipated expiration: 1938-05-03

Description

R. A. MOORE.

AUTOMATIC FIREARM.- APPLICATION FILED FEB.

Patented May 3, 1921.

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STATES ROBERT ALEXANDER MOORE, OF NEW YORK, N. Y.

AUTOMATIC FIREARM.

Specification of Letters Patent.

Patented May 3, 1921.

Application filed February 4,1920. Serial No. 356,354.

' To all whom it may concer/n.:

Be it known thatl, ROBERT A. MOORE, a citizen of the United States, residing at New York, in the county of New York and State of New York, have invented certain newl and useful Improvements in Automatic Firearms, of which the following is a specifica tion. v

The present invention relates to' certain new and useful improvements in the construction of recoil or gas operated automatic firearms, and has for its object to provide a device of this character which embodies novel features of construction whereby the sliding movement of the barrel produced by the discharge of the cartridge will automatically reload and recock the weapon so that it can be again fired by releasing the safety and pulling the trigger.

Further objects of the invention are to provide a gas operated rearm'of this character which embodies few and simple parts,

which can be readily assembled 'or taken apart, which is dependable'in its operation, and can be lired rapidly without danger of jamming, and which 'provides a safe and eilective weapon.

Other advantages and valuable features will appear as the description proceeds, and while I am describing and illustrating one particular embodiment of the invention, it

will be understood that many changes and alterations are possible in the details of construction without departing from'y the spirit ofthe invention as set 'forth in the claims.

In the drawings, which .illustrate a preferred embodiment ofthe invention.-

Figure 1 s a sectional elevation of an' au tomatic pistol which is constructed infaccordance with the invention, -the trigger being shown in the ,position assumed when it ispulled rearwardly and the hammer being shown'fas lowered. 1

Fig. 2 is a side elevation of the pistol.

Fig. 3 is a transverse sectional view-on' the. line. 3-'3 of Fig. 1.

Fig. 4 is an end view ofthe b arrel.

Corresponding and like parts are referred to in the following description and indicated in all the views of the drawings by the same reference characters.-

Referring to the drawings, which illustrate one possible embodiment of the invention, the numeral 1 designates a handle which hasv a hollow formation and houses a magazine 2 within which the cartridges 3 forward end of the slideway 5.

are held preparatory to being fired. The

-usual trigger guard 4 is' provided in connecwhich operate within corresponding undercut portions at the sides of the channel 10 of the slideway. The barrel is thus free to slide forwardly against the action of the spring 8, although it is locked against lateral displacement, and is normally held in a yielding engagement with the breech block 10 by the'action of the spring. This breech block is iiiied, being shown as integral with the upper end ofthe handle. The coil spring 8 is interposed between a lug l1 which projects 'downwardly from the rear end of the barrel-and a removable stop or abutment 12 which is fitted in the This removable-stop member 12 is normally held in position by a detent 13 which is pivoted at 14 on the trigger guard, and the forward end of the. coil spring 8 is looselyreceived4 upon a positioning pin 15 projecting from the stop. With this construction it will be obvious thatby -irst releasing thedetent 13 and takingA outthe stop 12 the sliding barrel and coil spring'c'an be removed fromthe handle.

The hammer 16 is pivotally mounted at -17 in a recess 18 atthe back of the handle 1.

Any'conventional form of main spring may lbe provided for actuating the hammer,and the hammer .is provided with a pin 19 which loosely engages a hammer controlling arm 20 projecting rearwardly from a trigger lever 21. This arm 20 is yoHset laterally from the trigger lever. 21, as' indicated very clearly by Fig. 3, so that it can extend rearwardly through ,the handle at one side of the magazine 2- and will not interfere with the movement of the .cartridges 3' through ioo . the magazine.' The pivot end of the hammer is provided with a pair of notches 22 which are adapted to be engaged by a safety member 23 for the purpose of locking the hammer either at. half-cock or full-cockvpositions. A spring 24 normally holds the when it is desired to discharge the firearm.

Theftrigger lever 21 extends downwardly from its pivot pin 34 and is provided atk its f ger andthe hammer so that, assuming the safety member to berreleased, a pull upon 1 4the trigger will release the hammer and permit it tostrike against the firing pin 36.l

lower end with a notch 27 which is adapted to be engaged by a dog28 to hold the hammer in full-cock position. A spring 29 normally tends to urge the dog into' operative position, and said dog is provided with a notch 30 adapted to be engaged by a pawl 31 which is carried by the trigger 32. A

s rinfr 33 normally tends to force the pawly 31 into operative position. The trigger is pivoted rat 26 and a .spring normally holds the'trigger in inoperative position. When the hammer is cocked the trigger lever 21 is swung rearwardly so that the dog 28 engages the notch 27 at the lower end thereof` The Kpawl 31 of the trigger also engages the /notch 30 of the dog. r An Loperative, connection'f is thereby produced between the trig- This will discharge the cartridge which is in position within the chamber of the bar- I rel, and thev action of the gas or recoil will cause the barrel to move forwardly against the spring 8. Upon the forward movement of the barrel the head of the spent cartridge will be engaged by someconventional form of extractor so that the shell will be thrown laterally lor upwardly and discharged from the firearm before the return of the barrel to its original position.

Upon the forward movement of the barrel the lug 11 thereof rides upon cocking arm 37 which is integral 'with the trigger lever21 vand extends forwardly therefrom. This lcooking arm is thereby swung downwardly, andthe hammer controlling arm 20 moved to return the hammer to 'a full-cock position. The safety member 23Athe'n engages one of thel notches 22 of thehammer, while the dog 28- and pawl 31 automatically swing into operative position.

The magazine 2 extends upwardly throughj the handle in an angular relation to the barn,` rel, andthe cartridges in the magazine rest upon each other in a superposedfrelation. A; magazine follower 38 normally tends to ,urge the cartridges upwardly, and aspring 39 isf, interposed between' the 'follower and awslide 40which closes the lower end ofthe maga-fV zine.' The uppermostcartridge in the maga- .v zine is heldyieldably-againsta recessed por@ v tion 41 in the bottom of the breech end of the barrel, and when the barrel moves for-V wardly the spent shell is discharged by the .position shown in Fig. 1, ,it is merely neces- `one side of the breech-block in such a manner as to engage the cartridge immediately below the uppermost cartridge of the magazine andthereby prevent more .than one car tridge from being moved upwardly into position to enter the chamberA of the barrel when thebarrel is moved fowardly, byA the discharge of the firearm. Upon the return of the barrel to its original position the stop member 42 is engaged thereby and swung rearwardly so that the then uppermost cartridge of themagazine. can move upwardly into a yielding engagement with the rev cessed portion 41 of the barrel.

It will thus be obvious that with the magazine full of cartridges, the parts being in the sary to cock the hammer and movethe safety f member into inoperative position in order to'discharge the firearm by pulling upon the trigger. The discharge. of the firearm will operate automatically to slidevthe barrel forwardly, whereuponl the hammer is again moved to a full-cock position and the upperm'ost cartridge of the magazine elevated into position to enter the chamber upon the return of the barrel. The cartridges ofy the 100 magazine can thus be fired with great rapidity, and the magazine is all so simple that there is nothing to break-or get out of repair. A sliding lock 43is shown as provided at one side of the pistol, and this lock can be p urged upwardly into engagement with a corresponding recess in the barrel for the urpose of locking thev barrel in a forward) position when it is desired to clean the barrel or inspect the bore thereof.. This also enables access to be obtained to the magazine if it is desired -to load the pistol from the to thereof.

`aving thus described the invention, what .I claim as new and desire` tonsecu're `by Let- 115 f ters Patent, is

1. In a fire arm having asliding barrel, a hammer, atrigger, andan integral three armed lever, ,one of thearms being opera.- tively connected withthe hammer, `while another arm :has an operative connection y with the trigger and the third arm is acted upon bythe sliding ofthe Vbarrel to cock` the hammer. y

,2.In'a firearm having asliding barrel, a v125 hammer, a.trigger,'ali integralthreearmed lever,9ne of the arms of which,.isopnera`v tivelyVY connectedv to the hammer while another arm has an operative connection with the trigger and the third arm is arhammer, a trigger, a trigger lever associated` ranged at an angle to the barrel, and means upon the barrel for engaging the said third arm to swing the lever and cock the hammer.

3. In a firearm having asliding barrel, a hammer, a trigger, said barrel being pro- `vided with a lug, a spring engaging the lug mer, a rearwardly extending arm carried by the trigger lever and engaging the hammer, and a forwardly extending arm carried by the trigger lever and arranged to be moved by the sliding of the barrel to cock the hammer.

5. In a firearm having a sliding barrel, a

with the trigger, a hammer controlling arm rigid with the trigger lever and extending rearwardly into operative engagement with the hammer, a cocking arm integral with the trigger lever and extending forwardly therefrom, a lug on the sliding barrel for engage# nent with the cocking arm to swing the same and cock the hammer on the forward novement of the barrel and a spring enl@aging the lug for holding the barrel normally in operative position.

6. In a firearm having a sliding barrel, a hammer, a trigger, a pivotally mounted trigger lever operatively connected to the hammer, a dog arranged for engagement with the trigger lever to hold the hammer in 'a cocked position, and means on the trigger for disengaging the dog from4 the trigger lever.

7 In a firearm having a sliding barrel, a

hammer, a trigger, a pivotally mountedV trigger lever operatively connected to the hammer, a dog arranged to engage the vtrigger lever to hold the hammer in cocked position, and a pawl carrried by the trigger for engagement with the dog to release the same.

8. In a firearm having a sliding barrel, a

hammer, a trigger, a trigger lever, an integral arm extending rearwardly from the trigger lever and operatively connected to the hammer, an integral cocking arm extending forwardly from the lever, means on the barrel for engaging the cocking arm to cock the hammer upon the forward move; ment of the barrel, a dog for engagement with the trigger lever to hold the .hammer in a cocked position, and means carried by the trigger for engaging the dog to release the same.

9. In a firearm having a sliding barrel, a hammer, a trigger, a trigger arm operatively connected to the hammer so as to be movable i therewith, trigger controlled detents engagin the trigger arm, a cocking arm rigid with the trlgger arm, and means upon the barrel for engaging the cocking arm to actuate the same and thereby cock the hammer on the movement of the barrel.

10. In a firearm having a sliding barrel and a slideway upon which the barrel is mounted, a removable stop for the forward end "of the slideway, means for locking the removable stop in position, a lug projecting from the barrel, and a spring interposed be tween the lug and the stop for normally holding the barrel yieldably in operative position. A

11. In a firearm having -a sliding barrel, a slideway upon which the barrel is mounted, a hammer, va stop at one end of the slideway, a lug projecting from the barrel, a spring interposed between the lug and the stop to hold the barrel normally in operative position, an inclined'arm arranged in the path of the lug, and means actuated by the swinging of the inclined arm by the action of the lugthereon to cock the hammer.

l2. In a firearm having a sliding barrel, a hammer, a trigger, a pivotally mounted trigger arm operatively connected to the hammer In testimony whereof I aflix my signature. y ROBERT ALEXANDER MOORE.