US1738751A

US1738751A - Automatic pistol

Info

Publication number: US1738751A
Application number: US241696A
Authority: US
Inventors: William R Bluehdorn
Original assignee: Individual
Current assignee: Individual
Priority date: 1927-12-21
Filing date: 1927-12-21
Publication date: 1929-12-10
Anticipated expiration: 1946-12-10

Description

D 1929- w. R. BLUEHDORN 1,738,751

AUTOMATIC PISTOL Filed D60. 21, 1927 avwenkw W. RE: 11.: Ehdurfl the barrel during its rearward and Patented P:

AUTOMATIC PISTOL in Application filed December 21, 1927. Serial N0." 241,696.

on man an M31 or MARCH 3, 1883, AS ammmnn nan, so, 1928; 370 o. 0.757

10 energy diminished by cushioning means which supply the reaction for counter recoil or by actuating parts of the firing, feeding and other mechanisms.

In the .45 caliber Colt automatic istol ownwardly swinging movement to eifect its unlocking from the slide performs no additional functions and is brought up against the receiver with great force. During the counterrecoil movement of the barrel and slide the same stop lug on the barrel through v V whentherear face of its In which its rearward movement is arrested is brought up against the pivot pin of the slide stop to arrest the forward movement of both barrel and slide. As a result the metal of the stop lug becomes crystallized and soon gives away.

The object of the present invention is to provide means susceptible of incorporation in existing pistols, to check the force of the the details of construction hereinafter described and claimed, it being understood that changes in the precise embodiment of the invention herein disclosed may be made within the scope of what is claimed without depart-' ing from the spirit of the invention.

A practical embodiment of the invention" is .illustrated in the accompanying drawings,

wherein Fig. 1 is a fragmentary view in side eleva-f tion, partly in section of a pistol constructed in accordance with the invention, the parts being in normal position;

Fig. 2 is a similar view showing the posi tion of the parts at the end of recoil;

Fig. 3 is a detail view showing a modified form of muzzle attachment. j i

Referring to the drawings by numerals of reference: 1 t l The standard Colt caliber .45 automatic pistol to which the improvements are to be applied comprises a receiver 5, a reciprocating slide 6 mounted on the receiver and a barrel 7 The barrel is provided with transverse locking ribs 8 which engage in grooves 9 in the slide to ositively lock these two members when in ring position. The rear end of the barrel is formed with a depending lug 10 bifurcated to pivotally receive a link 11 which establishes connection with the re ceiverthrough the slide stop pivot 12. By this arrangement the barrel is movable a limited distance lengthwise and in a vertical plane to accomplish disengagement or engagement of the locking ribs and the grooves.

The barrel after being unlocked, is arrested 10 strikes an abutment13 of the receiver. he slide, which constitutes a breech bolt, continues to the rear to effect ejection, cooking and loading and energizes the spring 14: which restores it to battery. When nearing completion of its counter recoil stroke, the slide encounters the rear portion of the barrel and forces the barrel forward and upward to locking position. The joint forward movement of the barrel and slide is arrested when the barrel lug 10 strikes the stop pivot 12. The barrel lug ,in taking the blows to arrest recoil and counterrecoil of the barrel soon becomes crys tallized and breaks off.

In order to correct this defect it is proposed to associate a gas check 15 with the recoiling members. The gas check may be atfpert-afe w r Pressure in ppo tio o coil. This will reduce the blow of thebarrel Iug IO against the receiver abutment 13.

or the pur ose of cushioning the return of the barrel an slide into battery an extension 19 is formed on the forward face of the link 11 and the return springguide 20 is modified by being plugged as at 21 to form a striking surface for the extension 19. In this manner the return spring which restores the gun to battery is conveniently utilized to check the force of the very members it is moving.

It will be obvious that the extension 19 may with the slide and an extension on the forbe incorporated in the barrel lug and it is onlyl necessary that such means be associated wit a member that is returning into battery. The foregoing improvements in addition to serving for the purpose specified will prove of considerable advantage in permltting rapid and correct reaiming of the pistol.

I claim:

1. A firearm embodying a receiver, a breech bolt slide reciprocally mounted on the receiver, a return spring for said slide, front and rear movable guides confining said spring, a gas check removably attached to the slide and establishin said gas check, a. link connecting the rear of the barrel with the receiver for controlling movement of the barrel into and out of looking engagement with the breech bolt slide and means engageable with the rear uide whereby the barrel may be eased into attery.

2. A firearm embodying a receiver, a

breech bolt slide reciprocably mounted on the receiver, a. return spring for said slide, a barrel movable out of and into locking engagement with the slide during the initial and final movement of the slide, a gas check on the slide and means whereby the barrel and .slide are eased into battery through a counteraction on the return spring.

3. A firearm embodying a barrel and a breech bolt slide each having a recoil and counter recoil movement, a return spring energized on recoil, a gas check associated with one of the recoilable members and acting on both of them and means associated with the barrel for counteraction b the return springs as the barrel arrives in attery.

4. firearm embodying a receiver, a breech bolt slide reciprocally mounted on the receiver, a return sprin for said slide, a as check attached to the s ide and establishing connection with the return spring and a barrel forwardly supported in said gas check and partaking of the initial and final movement of the breech bolt slide.

5. A firearm embodying a receiver, a breech bolt slide reciprocally mounted onthe receiver, a return spring energized by the slide on recoil, a movable rear guide for said sprin a barrel, a link connection between the arrel and receiver for moving the barrel into and out of locking engagement connection with the front guide, a barrel orwardly supported in