US985482A

US985482A - Automatic pistol.

Info

Publication number: US985482A
Application number: US58684010A
Authority: US
Inventors: Joseph H Wesson
Original assignee: Individual
Current assignee: Individual
Priority date: 1910-10-13
Filing date: 1910-10-13
Publication date: 1911-02-28
Anticipated expiration: 1928-02-28

Description

J. H. WESSON.

AUTOMATIC PISTOL.

APPLICATION FILED oGT.13,1910.

Patented Feb. 28, 1911.

J'OSEPII H. WESSON, OF SPRINGFIELD, MASSACHUSETTS.

AUTOMATIC PIsToL.

Specification of Letters Patent.

Patented Feb. 28, 1911.

appucation med october 13, 1910. serial No. 586,840.

To all rwhom it may concer/n:-

Be it known that I, JOSEPH WEssoN, a citizen of the United States, residing at Springfield, county of Hampden, State of Massachusetts, have invented an Improve-- ment in Automatic Pistols, of which the following description, in connection with the accompanying drawings, is a specification, like letters on the drawings representing like parts.

The present invention relates to an automatic pistol, and is embodied in a pistol of that type which is known as the gas operated, or blow-back automatic in which the barrel is stationary, while the hammer is cocked and the chamberopened for extracting the old shell and reloading, by the movement of a breech block which is thrown back by the reaction of the gases when the pistol is red. In a pistol of this class, it is impossible for the user to release the trigger in the brief interval ofV time'occupied by the automaticreloadingand cooking of the hammer, sollthat it is necessary to providev the lock mechanism with means for holdin the hammer cocked independently of the trigger action. l i

The resent invention relates to a novel device or performing this function, the natureof the device being such that the construction is simpliied to a large extent, and also rendered positive in its action, easy to assemble, and unlikely to'get out of order.

In accordance with the-invention, the ham-y mer is provided with a sear pivotally connected theret and acted upon by a spring which causes the searto engage a suitable cooking shoulder when the hammer is in its full cocked position. The trigger, which consists of a linger piece and a longitudi-v nally movable tirlpping member, is adapted,

when pulled, to engage the sear, in order to push the said sear out of engagement with the said cocking shoulder against the actionV of the s ear sprlng. In order that the hammer maybe re-cocked without necessarily releasing the trigger, that .part of the Sear or trigger whichcauses the latter to engage and trip the former, is arranged to be moved out of the way during the cocking action and restored when the trigger has been released.

Figure l is a side elevation, partly in section, of a pistol embodyin t e invention, showing the hammer at ful cock, and the trigger in its normal osition ready to fire'; 2 is a partial section showing the tiring pin, hammer and trigger in the position assumed by said parts at the time of tiring; Fig. 3 is a. view, similar to Fig. 2, showin the hammer cocked prior to the release o' the trigger after the pistol has been tired; Fig. 4 1s a horizontal section, on the line of Fig. 2; Fig. 5 is a similar horizontal section on the line m5 of Fig. 3; Fig. 6 is a front elevation, partly in section, of the sear and hammer; and Fig. 7 is a similar view showing a modification.

The pistol embodying the invention is of the usual blow-back type, being provided with the barrel A, breech-block B, which contains the firing pin B2, and the magazine chamber C, which is formed in the lpistol grip and adapted to receive the magazine, not shown, Which'delivers the cartridges to the space behind the barrel where the breech block is blown back.

In accordance with the invention, the hammer a which acts upon the firing pin B2 is pivotally supported at a2 and acted upon by the hammer spring a3 through the plunger a4, the said hammer being held in cocked position by means of the sear b. The said sear is pivotally connected with the hammer vat b2 and acted upon'by a spring b3, located behind the magazine chamber C, and arrangedl to press the sear b forward so that it will move over and be held by a suitable engagward by the spring bs so that 1t will snap forward and carry the shoulder b* over the rshoulder C4 as soon as the hammer a is/fully cocked, as clearly shown in Fig. 3.

To trip the hammer and fire the pistol, it is necessary that the sear be pushed back against the action of the scar spring, and for this purpose itis arranged to be acted on, when the'pis'tol is cocked, by the trigger tripping member d, the' actual engaging arts, however, being so arranged as not to .ing shoulder when the hammer is cocked.

lnterfere with the independent movements ofthe sear and trigger in the cocking move` ment. In the construction shown in Figs. 1 to 6, the sear is provided with a lateral projection b5 which is adapted to stand' behind the trigger tripping member d when the pistol 1s in condition to be tired, as shown in Fig. l. The said trigger tripping member consists of a flat plate which projects from the front toward the rear of the grip, extending along one side of. the magazine chamber C, so as not to interfere with the insertion of the magazine therein. The rear end of the member d extends into the opening C3 in the rear wall C2 of the magazine chamber, and is adapted to bemoved through said opening to act upon the projection b5 when the trigger finger d2, which is in front bf thegrip, is pressed. The said trigger is normally held forward by means of a spring Z3 and is limited in its'forward and backwar'd movement by shoulders Z4 and di. These shoulders engage, respectively, with a shoulder formed in the recess at the rear of the trigger guard, and with the` rear wall -C2 of the magazine chamber at the side of having a beveled upper surface which is in such position as to engage the under side of the trigger trippin member during the cooking movement the hammer and to be forced in thereby during the upward movement of the Sear, so that the said sear can travel past the trigger tripping member and be forced inward into cooking engagement,

regardless of the position of the trigger. This operation is clearly shown in Figs. 2 and 3, both of which views show the trigger as pulled back, one View, however, showing the hammer in firing position and the other in full cocked position. It will be seen from these views that as the hammer a is cocked, the beveled projection b5 will be pressed inward upon engagement with the under side of the trigger tripping member d and lie behind the trigger tripping member when the hammer is at full cock, so that thereis nothing to interfere with the forward movement ofthesear which causes the samel to engage with the shoulder C4 at Athe bottom of the frame opening. YUpon the release of the trigger, the latter will move forward under the action of the trigger spring cl3, and as soon as it reaches itsA normal 'forward position, shown in Fig. l, the sear projection b5 will spring outward behind the trigger tripping member d, so as tobe engagedthereby when the trigger is next pulled.

The construction of the sear rojection b5 is best shown in Figs. 4, 5 an 6, the said projection consisting of' a pin contained in a recess be extending transversely across the sear, the said recess vcontaining a spring 717, adapted to act upon the back of the pin which islimited in its movement and held vin position by means of a transverse pin bs gaged and pressed inward by the trigger tripping member to correspond with the position shown in Fig. 3. It-is obvious from Fig. '5 that the pin 'will spring outward behind the tripping member as soon as the said member vis moved forward and the trigger finger d2 has been released.

lt is obviouslyV not essential to the inven` tion that the specific construction and arrangement above described should be employed, and the structure is susceptible of modification without' departing froml the invention. lt is practicable, for example, to locate the yielding engaging member on the trigger instead of on the sear, such a construction being shown in Fig. 7, in which the trigger tripping member d is provided with a pin d contained in a socket 037. in this construction, the 'Sear b is provided with a notch b9 having a-'beveledl lower edge, the

notch being so positioned as to come in line with the pin when the hammer is in firing position, thus allowing the sear to move forward so that it can engage the shoulder C* when the hammer is back. As the sear travels upward, it will crowd in the pin d6 if the trigger is still pulled, but the pin will' snap into place 'in front of the sear when the trigger moves forward.

What I claim is:

1. In an automatic fire arm, the combination with a movable breech-block; of a hammer adapted to be. moved into cooking position through the action of said breech block; a sear pivotally connected with said hammer and provided with a spring adapted to move it into engagement with a cocking shoulder when the hammer is` at full cock; a trigger adapted to engage and trip said sear; and means whereby said sear and trigger are capable of independent movement except when the hammer is cocked.

2. In a fire arm,'the vcombination with a recoil-operated hammer; of a sear connected and movable therewith; a trigger tripping member coperating with said scar; and a movable engaging member carried by one of said parts and adapted to be engaged by the-other, when the pistol is cocked and ready to be tired. l

3. En an automatic pistol, the combination with a recoil-operated hammer; of a Sear pivotally connected with said hammer; a spring acting -on said sear; a shoulder adapted to engage and hold said Sear when the hammer is cocked; a longitudinally movable trigger adapted to engage and trip the said scar; and a depressible projecting member extending laterally from said se'ar and normally lying behind the trigger, said depressible member being arranged to be depressed by engagement with the trigger during the cooking movement of the hammer, and to be automatically moved into place behind the trigger when the latter has been released by the finger.

4. In an automatic pistol, the combination with a movable breech block containing a ring pin; of a hammer adapted to be moved into cockin'g position by the recoil movement of the breech block; a sear connected with said hammer; and adapted to cooperate with a fixed shoulder to hold the hammer cocked; a trigger member adapted to disengage said sear from said shoulder to iire the pistol; and an engaging device adapted to be automatically moved into engaging position 'when the hammer and trigger are in firing position, without interering with the independent movement of the sear and trigger.

5. In an automatic pistol, the combination with a hammer; of a movable breech block adapted to cock the said hammer; a magazine chamber below the breech block;

a Sear pivotally connected with the hammer and provided with a sear spring adapted to move it toward the rear wall of the magazine chamber; said magazine chamber having an opening through the rear wall, the lower portion of which opening constitutes a cooking shoulder for the scar; a trigger having a tripping member extending across said magazine chamber into the opening in the rear wall thereof, the said trigger tripping member being normally outof the path of the said sear, and an engaging member connected with one of said parts, and adapted to be automatically brought into engaging position when the sear and trigger are in cooking position.

6. The combination with a recoil operated hammer; of a scar pivotally connected therewith; a spring actuated projection extend# ing laterally from said Sear and provided with a beveled surface; a trigger provided v with a tripping member movable transversely with relation to said sear and. adapted to engage said spring actuated projection; and a shoulder adapted to retain said scar when the hammer is at full cock.

In testimony whereof, I have signed my name to this specification Iin the presence of two subscribing witnesses.

JOSEPH H. WESSON.

Witnesses:

y HAROLD K. SCHOFF,

GEO. P. CHAPIN.