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Publication numberUS1403133 A
Publication typeGrant
Publication dateJan 10, 1922
Filing dateApr 7, 1919
Priority dateApr 7, 1919
Publication numberUS 1403133 A, US 1403133A, US-A-1403133, US1403133 A, US1403133A
InventorsOscar Stokke Fred
Original AssigneeOscar Stokke Fred
Export CitationBiBTeX, EndNote, RefMan
External Links: USPTO, USPTO Assignment, Espacenet
Automatic pistol
US 1403133 A
Abstract  available in
Previous page
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Claims  available in
Description  (OCR text may contain errors)




Patented Jan. 10, 1922.


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` Appiieation fiied April 7,

commonly known as automatic pistols.

An object of the invention is to provide anl automatic pistol which is comparatively simple in construction, embodying a combined bolt and firing pin which are recoil operated to move them into a cocked Vor retracted position, and which are operated, through the medium of a spring, upon release by trigger operation for striling and discharging a cartridge in the barrel ofthe pistol. i

Another object of the invention is to provide, in an automatic pistol as specified, a vertically movable locking pin which engages in a notchV vin the bolt of the pistol forl holding this bolt in. a retracted position and also to provide a sear operated through the medium of a trigger operated lever, which Vis in turn Voperated by the movement of an ordinary' trigger'to release the bolt and tiring pin,

Y for discharging a cartridge, and also to provide means for feeding new cartridges into the breech or barrel of the operation thereof.

Another objectf of this invention is to provide a novel form of safety catch to prevent accidental discharging Vof the pistol, which comprises a stock carried pawl pivotally mounted and adapted to be moved into the path of an enlargement formed upon the bolt of the pistol for preventing contact of the firing pin with a cartridge upon accidental operation of the trigger or for'holding the pistol mechanism in a safety position when the pistol is not in use.

Other objects ofthe invention will appear in the .followin detailed description, takenV in connection with the accompanying drawings, forming a part of this specification and in which drawings:

Figure l is a side elevation of the impistol during the proved automatic pistol.

Figure 2 is a longitudinal section through the improvedautomatic pistol, showing the Specification of Letters Patent.

Patented Jan 10, 1922.

1919; seriaiNo. 287,956.

bolt and -ring pin in' a retracted or cocked position, v

Figure 3 is a longitudinal sectionvthrough the automatic pistol showing the firing pin and bolt in a safety position.

, Figure 4 is a fragmentary horizontal section through the pistol.

Figure 5 is a fragmentary end elevation of the pistolillustrating the safety catch. ldetail perspective of the` Figure 6 is a trigger lever, and.

Figure 7 is a detail perspective view of the sear.

Figure 8 is a fragmentary section through the pistol showing the operation of the ejector.

Referring more particularly to the drawbarrel 3 may be connected to the frame 1 inA any suitable manner and the frame is preferably made up so that the side plate, indicated at 4, may be removed for access to the mechanism of the pistol, the said side 'plate being detachably vconne'ted to the frame proper by` means kof removable screws 5.

The hand grip 2 is hollow, and receivesk therein the cartridge magazine 6 from which the cartridges indicated at 7 are fed, to the breech of the barrel 3, as shown in Figures 2 and 3 of the drawings.

The magazine structure 6 is similar to that disclosed in the application filed November 30, 1917, Serial No. 204693, including the follower 8, which is urged upwardly for feeding cartridges in front of the breech block 9 of the pistol by a follower spring 10. The magazine 6 is held in the hand grip 2 by a suitable magazine lock 11 comprising a spring controlled pivoted lever 12 having a knurled head 13 which engages over a portion of the outer end of the magazine to re` tain it in place.

The breech block 9 is slidably mounted in the frame 1, and is normally held in engagement with the inner end of the barrel k3 by the recoil spring 14, theV forward end of which engages the rear end of the breech block, it being comined in its proper position by a sleeve 15. lThe rear end of the recoil spring 14 extends into a recess 16 formed in the abutmentV block 17 and it abuts the'i'nner end'ofthis recess as clearly shown inxFigures 2 and 3 of the drawings.

The breech block 9chasajpairofside,plates 18 formed thereon, the outer surface of which is broken, as shown in Figuresl and 4 of the drawings and which slidably engage the sides of thev frame l` for-guiding the movement of the breechblock.

The breech block 9 is provided with yay central opening19, the forward end of which is ypartially'closed by an upstanding lug 20,

leaving' a comparatively small opening 21 through which fthe striker 22 ofthe vfiring pin^23is adapted to 4extend lfor striking the rim of a cartridge 7 placed inthe breech of the barrel`3 for discharging or exploding the said cartridge'. The firing'pin 23 is -formed upon the forward o r inner .end ofthe bolt 24 of the automatic'pistol andthis bolt Vextends slidably through a guiding opening 25 formed in the abutment block 17.

A spring 25 is coiled about the bolt 24 and its inner-.end engages the rear end 0f the v.firing pin 23, it "being engagedA in thersleeve 15 while its'rear end vengagesthe inner end of the recess 16.

After the "firing a cartridge in the barrel, the recoil yaction from the discharge ofthe cartridge will force the bolt 24 and firing pin'23 rearwardly in which rearward or retracted'positionit will be retained by' thejengagement fof the lug or extension 27 formedupon the locking pin 28 in the notch 29 which latter" Ynotchisvformed in theA bolt 24. The bolt 24 is shownlocked in its retracted positionf inFigure'2 of the drawings. I A

The locking pin 28 is normally urged upwardly for forcingA the lug 27 thereofinto -the notch 29 byfa coil spring A30' seatedin a v suitable well 'or recess 31 in thefframe V1 of the pistol. The locking pin 28 is further provided with a notch 32 formed therein, in which the tongue 34'of the sear 35 enga-ges. The sear 35 is pivotally mounted upon a pin 36 carrie-:l by the Yframe l, and it includes pin 40 carriedfat its end remote from the lug 38. and this pin engages in a suitable recess formed in the trigger 42. Thetrigger 42 is pivoted, upon a pin 43, andA in a suitable Y recess 44 to allow free movement thereof andit has a vfinger grippingor engaging portion 45 formed thereon whichextendsV into the space surrounded by the trigger guard pistol `has been :operated for 46. yThe trigger 42 `:is rnormallyheld in a vforward position bya spring 47 and when lheldin su'` hposition the lug 38 is maintained 1n engagement with the shoulder 37. The

.trigger lever 39 has an upstanding projection 48 formed thereon which extends into the -recess 49 in the frame 1, vin which the breech block 9 reciprocates. This upstanding lug 48 i is normally maintained upwardly in the path of the breech block ' asuitable springV 50. Y

' The bolt 24h'as a knurledlhea-df 51 upon its 'outer end and also an enlargement 52 thereon, so that at the initial operationof the pistol, the bolt 24 may be 'retracted'm'am' ually by gripping this knurled head 51"'and upon this retraction ofthe bolt, the-spring 30 will force the locking Vpin 28 upwardly, lto move the lug 27 into the notch 29 vandlo'ck the bolt in its Vretracted position, to bere-y leased, by the rearwardv movement ofthe lower end of the trigger 42.` The rearward movement ofthe portion ofthe trigger 42 below it pivot 'pin 43 will move 'theupp'er end of the trigger forwardlyfmovin'g 'the' Vtrigger lever 39. forwardly a short distance,

and rocking the sear 35-t0 forcethel'o'cking pin 28 downwardly, releasing the y'bolt24 and allowing it to be projected or forced forwardly by the expanding action 'ofthe spring 25. or formed integrallyupon the bolt- 24 and will, consequently be projected forwardly engage the rim ofthe cartridge 7 Ainthe `breech of the barrel 3and explode this'v'c'artridge. y

The recoil action of the exploding cartridge will force .the breech block 9'and also the firing pin 23 and-boltV 24, rearwardly, depressing the trigger lever 39by the. riding The firing pin 23 is carriedby with thebolt and lthe striker 22 thereonwill I ofthe breech block over the upstanding lug c 48, allowingthe sear 35 to rock under action of the spring 30 to permit thev lug 27 to be forced into the notch 29 to lock the bolt in' its retracted or cocked position.

The breech block 9 has an extractor'lpawl 52 pivotally carried thereby,"the'bill 'end 53 of which is held in engagement with the rim of a cartridge 7 by a spring 54 so that upon they rearward or retracted movement of the breech block by the recoil of the car- `tridge the shell thereof will ybe extracted Yfrom the barrel 3 and afterA the innermost end of the cartridge has lpassed out ofthe barrel, and into the open space left byV the retracted breech block, the. action 'of thel ejector 55 will force the 'spent shellout of the pistol structure and a new cartridge will be fed 'or moved upwardly infrontof the breech block, out of the magazine 6 by the action ofthe follower' spring110 so'that upon the Vreturn of the breech block to its normal position under action of thev recoilspring 14, the new cartridge will'be forced'intdthe breech Aof the barrel 3 for firing upon the next operation of the trigger 42.

The ejector which co-acts with the extractor 52 for ejecting a spent shell, as

shown in Figure 8 of the drawings, has the threaded shank 56 formed thereon which is threadably engaged in an opening formed in the barrel 3 and adjacent portion of the stock l. When the bolt or ring pin 23 is in an operative position for discharging the cartridge 7, the ejector 55 is seated in a suitable recess 57 formed in the breech block 9. The ejector 55 has a lateral shoulder 58 thereon which engages against the rim of a shell and tilts the shell for ejecting it through the opening formed upon the recoil of the breech block 9.

A safety catch structure is provided for preventing the accidental discharge of the cartridge in the pistol and it comprises a catch member 53 which is pivotally mounted, by a suitable pin 54 to the rear end of the frame l. This pivoted catch has one end 55 shaped to fit partially about the .bolt 24 and a laterally extending projection 56 is formed upon the opposite end which is hollow, forming a seat for a spring 57 which engages a ball 58 and forces it outwardly into recesses 59 and 60 formed in the rear end of the frame 1. When the cap 53 is positioned so that the ball 58 will be seated in the recess 59 the end 55 0f the latch will engage the bolt 29 and upon forward movement of the bolt, this end 55 will engage the end enlargement 52 preventing contact of the striker 22 with the cartridge 7, and consequently preventing explosion of the cartridge. When the lever or cap is rocked upon its pivot so that the ball 58 will be engaged in the recess 60, the end 55 will be moved out 0f the path of the enlargement 52, and the bolt 24 and firing pin 23 will be allowed to move forward to the limit of their movement for firing the cartridge in the barrel.

The barrel 3 has a front sight which may comprise a rigid portion 61 and a pivoted portion 62 if desired, while a rear sight 63 is adjustably connected to the abutment block 17. The rear sight 63 has a threaded shank 64 formed thereon which is threaded in a suitable recess in the abutment block 17 which recess preferably communicates with the recess which receives the locking pin 28 and a spring 30 to facilitate the mounting of these elements in the pistol mechanism.

Changes in details may be made without departing from the spirit of this invention, but

I claim:

1. In an automatic pistol, the combination with a Vframe having a longitudinally extending bore therein, of a bolt slidably mounted in the bore, said frame having a vertically extending opening bisecting the horizontal bore, a rear sight tted in the upper end of said vertical opening, a pin slidably mounted in the vertical opening and arranged below the bolt, the bolt having a notch formed therein arranged to be engaged by the pin when the bolt is in its firing position, an expansion spring arranged in the vertical opening and arranged to engage said pin to normally hold the same in engagement with the bolt, a pivoted sear arranged in the frame and operatively connected to the bolt, a trigger, and a trigger bar pivotally connected to the trigger and arranged to engage said scar.

2. In an automatic pistol, the combina-y tion with a frame, of a breech block slidably carried by the frame, the block having a seat formed in the lower surface thereof, a bolt slidably mounted in the breech block and in the frame, a ring pin carried by the bolt, the bolt having a notch formed therein, a right angularly positioned spring pressed vertically disposed pin slidably mounted in the frame and located below the bolt and arranged to engage in the notch formed in the bolt, a pivoted sear disposed in front of the pin, a rearwardly extending finger formed on the sear arranged to engage the pin, the lower end of the sear having a shoulder formed thereon, a trigger, a trigger bar pivotally connected to the trigger and having a nose formed on the rear end thereof adapted to engage the shoulder of the sear, a projection formed on the trigger bar adapted to lit in said seat whereby the nose formed thereon can engage the shoulder on the scar, and spring means urging the trigger bar projection into the seat and in engagement with the breech block.

3. In an automatic pistol, the combination with a frame, of a bolt slidable in the frame arranged to project rearwardly therefrom,

a firing pin carried by the bolt, spring means normally urging the firing' pin into firing contact with a cartridge, means arranged to engage the bolt t0 hold the same in firing position against the tension ofthe spring, means to move said bolt engaging means out of engagement with the bolt, a vertically disposed safety latch pivotally carried by the rear end of the frame and arranged exteriorly of the frame, an extension Vformed on the latch arranged to partially encircle the bolt, a head formed on the rear end of the bolt and disposed outwardly of the frame and arranged to engage said extension of the latch when the extension of the latch is thrown in engagement with the bolt, and a spring locking member carried by the latch arranged to engage the frame t0 hold the extension into and out of operative position with the bolt.


Referenced by
Citing PatentFiling datePublication dateApplicantTitle
US2492814 *Nov 15, 1947Dec 27, 1949Marlin Firearms CoFire-control means for semi-automatic firearms
US2655839 *Nov 5, 1946Oct 20, 1953Sturm Ruger & CoBlowback autoloading pistol
US2780881 *Dec 19, 1952Feb 12, 1957Remington Arms Co IncFirearm ejector
US2832266 *Nov 8, 1952Apr 29, 1958Olds Sunderland OswaldAutomatic pistol
US2856716 *Jan 18, 1957Oct 21, 1958Robert ComptonAutomatic rifle with a combined movable chamber and magazine
US2912779 *May 7, 1956Nov 17, 1959Remington Arms Co IncFirearm with means for extraction and ejection of rimfire cartridges
US2933983 *Mar 20, 1958Apr 26, 1960Sturm Ruger & CoSemi-automatic pistol
US3153295 *Sep 18, 1961Oct 20, 1964Allyn Harold DReceiver-barrel assembly with stock and trigger housing
US5386659 *Dec 17, 1993Feb 7, 1995Smith & Wesson Corp.Fire control mechanism for semiautomatic pistols
US7726230 *Jan 8, 2008Jun 1, 2010Saim Alper ErdemSemiautomatic pistol
US9410760 *Jul 30, 2015Aug 9, 2016Double Nickel Holdings, LlcSear assembly for hammerless, striker fired handgun
US20100139143 *Jan 8, 2008Jun 10, 2010Saim Alper ErdemSemiautomatic pistol
US20160084600 *Jul 30, 2015Mar 24, 2016Double Nickel Holdings, LlcSear Assembly for Hammerless, Striker Fired Handgun
U.S. Classification89/145, 42/75.1, 42/71.2, 89/195, 42/25, 89/148
International ClassificationF41A15/00, F41A17/00, F41A19/00, F41A17/64, F41A15/12, F41A19/30
Cooperative ClassificationF41A17/64, F41A19/30, F41A15/12
European ClassificationF41A15/12, F41A17/64, F41A19/30