US1143170A

US1143170A - Firearm.

Info

Publication number: US1143170A
Application number: US80319213A
Authority: US
Inventors: John M Browning
Original assignee: Individual
Current assignee: Individual
Priority date: 1913-11-26
Filing date: 1913-11-26
Publication date: 1915-06-15
Anticipated expiration: 1932-06-15

Description

FIREAB'M. APPLICATION 'flLEn Nov. 26.1913.

1. |v|. BRQWNING. FIREARM.

APPLICATION FILED NUV.26,l 1913- Patentea Jun@ 15, 1915.

5 SHEETS-SHEET "L I uw@ 1.-|v|. BRowNlNa.

FIREARM.

APPLICATION FILED NOY. 25. I9I3.

1, 143, 170- Patented J une 15, 1915.

5 SHEETS-SHEET 5.

UNITED STATES-"PATENT OFFICE.

T allwhom it may concern.'

Be it known that I, JOHN M.. BRowNrNG,

a citizen ofthe United States, residing atv Ogden, Utah, have invented certain'new and useful Improvements in Firearms, of which the following is a Speclicatlon.-

A principal objectl of this invention s to providefa frame or receiverxhavlng solid,`

. unbroken top and sides'with a bottom ejectional detail on the section line 4 of Fig.'3.

tion opening- The magazine is filled through the ejection opening. The mecha.- nism is designedto operate properly 1n connection with a receiver of this character.

The invention also includes a slide mounted to reciprocate in the receiver and a tilting breech-block supported entirely by the adapted to shot gunsand to a slide action, 'but many features of the invention may be used in firearms ofA other classes, and some features may be used with other than a slidin action. will now describe one exemplifying structure embodying theinvetion.

It is to be understood that the invention is'- capable of embodiment in many different forms.

The objects and advantages of the inven? tion will be 'further pointedout in donneetion with this detailed. description so far -is necessary to enable'persons sln'lled inthe art to understand the same.

Figure 1 is a side elevation of a complete-- Fig. 2 is-"aV gun embodying the invention. side elevation of the barrel detached. Fig. 3 is an enlarged detail partly'jin section of the barrel fastening. Fig. 4 is an addi- Fig. 5 is a detail on section line 5 of Fig. 3. Fig. 6 is a front end view of the barrelfas- Y' tening nut. Fig. 7 is alongitudinal section of themagazine. Fig.V 8 is a vertical Specification of Letters Patent the same. 'of the hammer, trigger, slide-stop and slide.

lend of the carrier.

Patented J une 15, 1915.

Application 1aed November as, 191s. serial No. 303,192.

longitudinal section, the parts within the re-v ceiver being shown, however, in full. 9 is a vertical longitudinal section, the within the. receiver being shown in section. Fig. 10 is a top plan of the trigger-plate and Fig.

associated parts, removed from the gun.'

Fig; 111` is a vertical longitudinal section of Fig. 12 is a fragmentary section Fig. 13 is en vertical transverse section parts through the receiver at the rear of the breech-block. Fig. 14 is a verticalsection ofthe breech-block, showingthe extractor and firing-pin.' Fig. 15 is a' bottom plan of theslide.` Fig. 16 is a section tlv'ough the trigger-plate to show the safety-stop. Fig. 17 is a transverse s'ection'oi:l the safety-stop. Fig. 18 is a longitudinal section through the receiverwith all moving parts removed except the slide, spring, cartridge-stop, and slide-bar. Fig. 19 is a horizontal section` through the receiver with allparts removed except the two cartridge-stops and a fragment of the slide. Fig. 20 1s a horizontal section vofthe receiver showing the end'of the breech-block passing through the front Fig. 21 is a vertical, longitudinal section showing a shell nearly withdrawn from the chamber.

Referring first to Figs. l to 7 inclusive,

.reference character 5 designates the receiver l as a whole.

In the front end of this is rigidly and, usually, permanently secured the magazine 6, on whichis slidably mounted the slide-handle 7, connected by means of slide-bar 8 to the slide vwithin .the receiver. The front end of the receiver is provided with an aperture9, as better shown -in Fig. 18, to receive the barrel 10, and the rear end of the barrel and the aperture 9 are provided with vcoperatin-g interrupted threads 11. The barrel is also provided with'a lug 12, in the rear face of whichl is a socket 13. The adjacent face of the lug 'is provided vwith -a slot or channel 14, leading from one sidefof the lug to the socket.

Upon the frontend of-tlie'magazine is screwed a nut 1 5, having on its .forward end a Astud'l. To set up the gun after it has been taken down therear end vof the vbarrel is inserted inreceiv'er socket 9 and given aquarter-turn, whereupon the rear face y of '1ug`12 is brought in front of nut` land stud 16 passesthrough the slot 14 of the lug and is opposite socket `l3. By screwoeiver is open -to provide forthe location.

" 'of the trigger plate 23 at .the rear end of 51 vcoperatung with cams 52.0'11 -tlie slide.

In certain positions,l the breech-block 34 vlocate it iu relution to the mnguzine.

e follower 19.5:v

ing the nut` gout, the studv is thencaused to enter the socket und the borrel is. thus liruily locked to the front end of the megu-4 zine und nlsosecured ait'its buse in the re ceiver. A' very stroiwund' rigid barrel support 'isthus secure .:ured n yoke 17 'fitting about half .wey nroum'l` the bin-rollte' further support und this particular. embodimentl it will be noticed that the nut also serves es a.

closure for the forwardzend of thev maga'.- zuie -end-luis nn `abutment for the magazine spring 18, 'the renr'end of which enguges lhe purticuliir modeof fastening the but? rel nib/ove described is only nn.. exemp1i ficn tion ol. different structures that can be -em pdoyed lor the sume purpose. For instance, thel lop, 1L u'ight be provided W1th e sereyv to eugene the end of-lthe magazine Aand vuriouspther changes may be; mede without depnrtmg `from the invention.

Thef rec'en er', asl-best'u-nderstood from i' Figsd., 131..:ii1d'18, liesfafsolidntop `20 and 'l sidelwill's 21, At-.the bottom, .the r'ethe receiver;L ind to provide for the loadin and: ejection opening 24 nt the front en 'cfffthey reeeiver. The sides of the trigger plete' rufe.y provided with ribs 25- (Figs.-8

:indu-lolyfandthese't into vchannels 26 in theinner Iside Wells .ofthe receiver (Fig.

.18.).f\";l?ife trigger'plate is slid into the rev{eeh/er from the rear und securedbyscrews 27. The hummer and trigger mechanism carried by the..triggerplete will bev litter described. 1n;v the inner wells of the' recei'ver are two channels 28, in which fit the 'sides ofthe 'slide 29. Slide-ber 8 passes through' thev front woll 'of the receiver und lies in ,one of 'these slots 28. A recess 30 1s providedv meurthev front end of the slidej- 'gto receive the rear end of the slide-ber, and

these two partisere' detaehably connected by e transverse pin 31 mounted in thcslide.

Theouter end of this pin engages a. hole in theslidefber, as best shown in Figs. 15 and 18. lA central portion of the pin is also exposed 'et the `bottom of the slide and the pin'is here provided with on annular groove 32 engaged by the heed .ofserew 33. This.. 5 screw is exposed through the ejector o ening` when. the fslide 'is forward, im byl slightly withdrawing the screw und pushing pin 31 inwnrd its end is withdrawn from g 0 'l There -ure provided to control the movechannel in which tsje lug,` 36v ofthe breech-b1ocl providing a lateral guide for the front end offthe breech-block in rele.-

fposition.

breech-block is effected by'theslide, as will a vrecess in the slide. .lhe reor foce of this lug constitutes n com eoperuting with u' com 39 on the slide. .'lhe bottom 40 of lug Preferably, also, neer-the front end of-the'mugazineis. se-v 37 is udopted'to rest upon the roerend 45]. ofthe slidewhen the breech-block is locked, as will appear. 'The freut fau-e 4:2 oflug 37 constitutes a. cum to cooperate with. cem

'face li3 ofthe' slide.. -Tlle `feces' 39, 4:0 und 42 ofthe breech-block :lug extend theull.v

widtholt' the bleek und havens. full Width y mg1nge1nent with-coperuting*parts of the slide, `which provides ample wearing sur- 'l'nce and :imple lateral stability. The upper. rein' 'end 44: of the breechsblook is adapted to engage e shoulder *i5 in thetop 'of the receiver to lock the breech-block in firing This lockinp;l vem;agement of the appear.

The cnrrier46 is pivoted in the receiver upon studs or screyvs e6 und consists of twotines or spring side pieces 4.7, 'connectedv onl by cross-piece LSint-the roer as best un erstood Afrom Figs. 8, 9 mdO. 'The bottom 49 of thj's cross-piece coperutes Withthe roiuided upper rein' surface 50 of the slide. vThe cerner arms also lieve enms passes between the arms lof the carrier. The

front ends of these' 'carrier arms-*pre pro-i, vided with inward vprojections, best shown' .in Fig. 20, :md such; projections have slenting feces a which'coperet'e withl cams' 54 on .the breech-loloclnf As the ,breech-block posses 'l'orwin-d between the virrins of the ciirl rior, these nrxns spriiw outward to permit such passage of the block, and to. provide for thisoutwmdmovement of the or s the receiver' 'is provided with recesses 55,.oppo- 58 to engage thel shell-heed durine' part-of its movement es will be describe After theshell-headlenvcs' the .rib it-enguges the carrier firms and the returding, 'Wedging eect thus exerted by the arms upon the upper edge of the shell-head in connection with the pull of theextractor, as will be more .fullydescribei assists in ejecting the shell.`

ment of cartrid es from the magazine 'two stops, which wi ,bedesigneted, simply for therpurpose of. identification, as a. springvstop und 'u OSitiVe-stOp.. The positivel' sto -bur 59 is; coated achunnel G0 in the" rig t wall of the rece1ver, 1s pivoted at 61,

site the arms when they nre `in ap roxiother wall of the receiver is the spring-stop-- bar located in a channel 66, pivoted at 67 and carrying at its forward end the inwardly-curved stop proper 68, engaging the shell-head in the position shown in Fig. 19.

A spring 69 urges the stop to engaged position. At its rear end the stop-bar 65 carries a cam 70 coperating with a cam-lug 71 on the slide. Fig. 19, which is a section in a horizontal `plane looking down, does not show the slide but shows the cam-lug 71 projecting downward from the slide to engage cam 70. This lug also clearly appears in its proper position on the slide in Figs. 8 and 1,5.

The breech-block is longitudinally slotted, and in this slot 2 is located the extractor 73. The rear en of the extractor is slotted to slidably and pivotally engage .pin 74.

The extractor hook 75 projects througha channel in lug 36 of the breech-block. The extractor is urged upward by wire-spring 76 (Fig. 14) coiled around pivot 74 and having a short end 77 resting on the bottom of breech-block channel 72, and a Ilong end 78, the end of which is slightly curved t0- ward the center of the breech-blockso that it may be sprung into a groove. 79 .in one side of the extractor-piece 73, and when so inserted will retain itself in position.

The firing-pin 80 is located in a hole 81 inthe breech-block and passes through an aperture 82 in the extractor-piece. The rear end of the firing-pin is enlarged anda spring 83 compressed between this enlargement and the breech-block urges the pin rearward. The firing-pin is held in* by transverse-pin 84 engaging a slot 85 in the enlarged rear end of the firing-pin.

The operations of filling the magazine, loading and ejecting shells may now be described: The magazine is filled through the ejectionv openingA 24 when the slide and breech-block are in forward position. Each cartridge inserted into the magazine is held by the spring-stop 68, which springs in behind the shell. The breech-block is tilted up at its rear end so that it engages shoulder 45 in lhe receiver and is positively locked in firing position. It is so held by upper rear face 41 of the slide resting under bottom face 40 of the breech-block-lug 37'. The

carrier is free and lies in substanti ally hori- .zontal position, as shown in Fig. 8, with the front ends of its arms slightly behind cams 54 of the breech-block. The positive cartridge stop 62 is held down out of the way of the cartridges in the magazine by cam 63 engaging the underside of the slide. In this closed position of the slide and breech-block, the breech-block is positively locked by member 41 of the slide lying below lug 37 of the breech-block and thus holding the upper rear end of the breech-block in engagement with shoulder 45 in the receiver. In loading, the first rearward movement of the slide brings member 41 of the slide away from under lug 37 and permits the rear end of the breech-block to be positively pulled down by cam-face 43 of the slide engaging face 42 of lug 37. About the same time, the front ends of the carrier-arms 47 engage cams 54 of the breech-block and the front end of the carrier is thrown up. The carrier stays in this position until the slide approaches the rear end of its stroke and then member 50 of the slide strikes crosspiece 49 of the carrier, raising it and throwing the front ends of the carrier-arms down to the position shown in Fig. 9. Some time before the slide reaches the rear end of its stroke, it engages positive-stop-cam 64, and raises the positive-stop 62 into the path of the second cartridge in the magazine. Some time after this, cam-lug 71 on the slide engages cam 70 of the spring cartridge stop, and just as the slide is at the limit of its rearward movement the spring-stop is withdrawn from the first cartridge in the magazine and the magazine-spring snaps this cartridge onto the arms'of the carrier. The second cartridge in the magazine moves back until its head engages the positive-stop. Forward movement of the slide then causes slide-cams 52 engaging carrier-cams 51 to quickly throw up the front end of the carrier, elevating the cartridge into line with the chamber in front of the breech-block. At about the same time the spring cartridgestop is released and moves to its active position in relation to the magazine. Further movement of the slide causes the breechblock, engaging the rear end of the cartridge, to push the cartridge into the chamber. During this forward movement of the breech-block it lies between the carrier arms. They are forced into the channels 55 to allow the front end of the breech-block to pass, and as soon as cams 54 pass the front ends of the carrier-arms the carrier-arms snap in behind the cams. Toward the end of the forward movement of the slide it engages positive-stop-cam 63 and depresses the positive-stop 62, releasing the cartridge which is now first in themagazine, and the cartridge thereupon moves slightly to the rear until it engages the spring-stop. The final movement of the slide causes its cam vated position.

4 breech-block in firing position, as shown in Fig. 8. In pushing the cartridge into the chamber, extractor 75 snaps into engagement with the shell base. The extractor is vthen in rearward position in relation to the br echblock, as shown in Fig. 9. After firing,

when the slide is moved back, the partsopcrate as before, but in this case the extractor pulls back the fired shell. During the Erst part of its backward movement, the upper edge of the lshell-base slides under rib or guide 58 in the receiver. After a short rearward movement, the upper edge of the shellhead engages the beveled lower surfaces 57 of the carrier-arms, which are now in ele- These portions of the car-- rier arms force the head of the shell down and exert a sort of wedging effect upon the shell head as it moves toward the rear.' The top of the shell is thus retarded while the. bottom is pulled back by the extractor, and

as soon as the front end of the shell leaves the chamber the shell is snapped down and ejected throughthe opening 24. The quick downward movement of the carrier occurring at about the same time assists i n ejecting the shell. upon the carrier, as'above described, and the actions may be repeated until it is necessary to refill the magazine.

The hammer 86 is pivotedrat 87 in the' trigger-plate, and a hammer-strut 88 is pivoted to the hammer at 89. The trigger-plate is bored from the rear, and in thisbore is mainv spring 90 secured in position by pin 91. The spring hasV a follower 92, and the rear end of strut 88 rests in a slight depression in the forward face of this follower.

The trigger 93 is pivoted in the triggerplate at 94, and the forward extension 95 of the trigger engages trigger-notch or cocknotch 96 on Vthe hammer. Pivoted also on the pin 94 is a piece 97, which performs several functions, but may be-identified as a slide lock. `This has a sear notch 98 coperating with a lug or tooth 99 on the hammer. At the forward end, piece. 97 ha's a slide lock or stop 100 engaging behind a shoulder 101 at the rearend of the slide.

, ward of this shoulder the slide has a groove 102 to accommodate stop 100, and the rear end of this groove is formed into a cam 103k to depress the stop just' before the slide reaches its foremost position.. The slide lock lis provided with a strong spring 104, one

end of which is inserted in a hole in the stop. The other end of this spring lies over the rear end 105 of the stop-piece and ex-V tends above a cam 106 formed on the upper A new cartridge is thrown Just` forface'\of strut 88. The spring is flexed and retai ed in position by a pin 107. The stoppiece I is also provided with a weak spring .`109 which ordinarily holds slide-stop 100 in active \position. The strong spring 104 becomes effective to overcome the effect of the weak spring when the hammer is released for firing. Thereupon, cam 106 of strut 88 engages the overlying end of spring 104 and urges slide-stop 100 down with sufficient energy to overcome the effect of the weak spring, unless, before the cartridge actually fires, the 'slide is improperly urged backward, as will be explained. The stop piece .97 also has a downward finger projection 97a exposed at the front of the trigger-guard. This permits the-stop to be easily manipulated for unlocking the breech without firing the gun.

In firing position, when the breech-block Vis locked in the position shown in Fig. 8, the hammer rests against the* rear face of the breech-block, and also against the rear end of the slide, so that at the first rearward movement of the slide the hammer is withdrawnfrom engagement with the breechblock and the firing pin, and cannot again j come into contact with the firing pin until the breech-block is again locked in firing position. Rearward movement of the slide depresses the hammer, as clearly understood from Fig. 9, until the trigger extension 95 engages behind the notch 96. The cocking of the hammer also depresses it sufficiently to Vcause the tooth 99 to engage the sear notch 98 of the slide-stop, which may be considered, in a sense, a sear, and when the hammer tooth 99 engages this Sear-notch the trigger-notch 96 is slightly in advance of the end of .the trigger` extension 95, as clearly shown in Fig. 11. In the ordinary use of the arm, just before the slide reaches A its foremost position, its cam 103, as shown in Fig. 12, depresses the front end of thc slide-stop, releasing tooth 99 from scar-notch 98. Thereupon, the hammer springs up slightly until trigger-notch 96 engages the end -of trigger-extensi 95. The final movement of the slide brings the rear end of lug 101 in front of stop 100, and thereupon under the influence of spring 109 the stop springs up behind the slide and positively locks it in ring position, and the shooter is thus protected in case of a hang-lire, because if he attempts to pull back the slide while pulling the trigger and before the cartridge explodes, the rearward pressure of the slide upon stop 100 will hold the stop in engaged position and prevent the slide from moving back, although at the same time the stop is urged to move to inactive position by spring 104, which has been vtensed by camv the stop and the stop will drop out of theAVA trigger-extension4 free from the triggernotch, and the hanimer will thenbe released for firing by the action of the cam 103v on the slide, depressing the stop 100'and releasing Sear-notch 98 from hammer-tooth 99.

A trigger safety-stop is provided, consisting of a stop-pin 110, mounted in a transverse bore 111 in the trigger-plate to the rear of the trigger. This pin has a rib 112 engaging a slot in the trigger-plate to prevent rotation of the pin. A spring plunger 113 is provided to engage a notch in the pinand hold it in safety position, and'also. by frictional engagement with the pin holds it- The'pin has a slot 114 which accommodates trigger-lug 115 when in firing position, but

when in safety position this trigger-lock is out of register with the slot and the trigger' is preventedfrom moving.

1. In a firearm, the combination of a receiver having a socket providedwith interrupted threads, a magazine rigidly secured to the receiver, a barrel having interrupted threads to engage'the receiver socket by rotative movement, a nut screwed upon-the forward end of the magazine and provided. with a stud, and a lug secured to the barrel and having a slotto admit the stud and limit rotative movement of the barrel, and a socket to receive the stud and firmly lock the barrel to the magazine and receiver. 2. In a firearm, the combination of a receiver, a barrel detachably engaging the receiver, a. lug on the barrel, a tubular maga- Y zine rigidly fixed to the receiver, a spring within the magazine and a nut screwed upon the front end of the magazine to engage said lug and lock the barrel, said nut also serving as an abutment for said spring.

3. In a firearm," the combination of a receiver, 'a reciprocating slide therein, a breech-block supported thereon, a carriei` having arms, one located at each side of the breech-block, and` means carried by the Vbreech-block and slide for actuating the carrier.

4. In a firearm, the combination of a. receiver, .a reciprocating slide therein, a1 breech-block supported on the slideand having wide lateral slide-engaging faces, a

carrier vmovably mounted within the receiver and having arms between which the breech-block is adapte to pass, means carried by the breech-bloc fand' slide for raisingand lowering the carriernand means to permit the block to pass betweenthe carrier arms in its forward movement.

5.. In a firearm, the combination of a receiver, a barrel, anda magazine communieating with lthe receiver, a slide, a breechblock supported upon the slide and movable in relation thereto,.a carrierpivoted in the 4receiver and having arms at the sides of the vwardly, and means by,which the breechin firing position with sufficient firmness.

block passes between said arms in moving forward. y

7. In a firearm, thecombination of a receiver having solid top and sides and a lloottom-ejection opening, a barrel, a magazine,

a reciprocating slide, a breech-block su pported thereon and moving in relation therepressed at the rear end of the slidemovement, and means by which the slide causes the carrier arms to be raised in the early forward movement of the slide.

8. vIn a firearm, the combination of a receiver having solid top and sides and a bottom-ejection opening, a barrel, a magazine,

a reciprocating slide, a breech-block supported thereon and moving in relation thereto, a 4carrier pivoted rearwardly in the receiver and having spring arms adjacent to the side walls of the receiver, means carried by the breech-block to raise the front end of 'the carrier in the early rearward movement Aof the breechblock.,- means by whi'ch the slide causes the carrler arms to be depressed at the rear end of the slide movement, means by which the slide causes the carrier arms to be raised inthe early forward movement of the slide, -and means for permitting the breech-block to pass between the carrier arms toward the end of its forward movement.

9. In a firearm, the combina-tion of a receiver, a barrel, a magazine, a slide, a

breech-block, a carrier, and` two cartridge stops, one actuated by the slide near-each end of the slide movement, and thefother actuated by the slide only `near .the end ofv its rearwardmovement.

10. In afirearm, the combination of a.re` i .ceiver, a barrel "and magazine, a. slide, a breech-block and acarrier, av positive cartridge stop pivotcd at one side ofl he re ceiver, means by which rearward movement of the' slide moves said stop to active position .and forward movement of sait slide moves said stop to inactive position, another cartridge stop engaging the cartridges in a slightly different position, and means by which rearward movement of the slide moves saidstop to inactive position.' l

l1. In a irearm, the combination of a receiver, a barrel, a magazine, a reciproeatimgg slide, a breech-block thereon, a carrier having arms at the sides of the receiver,.means for withdrawing the shell from the barrel 'with its upper side in engagement with the carrier, means for moving the carrier downl to eject the shell, means for placing a fresh cartridge above the carrier, means 4for elevating the carrier, arms carrying the cartridge in line with the chamber, and means for permitting the breech-block to pass between the carrier arms in placing the cartri dge in the chamber. 12. In a irearm, thc combination of a receiver, a barrel, a magazine, a` slide, a breech-block thereon a carrier pivotcd near therear of the receiver and havingarr'ns at the sides thereof, an extractor carried by the breech-block, means on the breech-block to elevate the front ends ofthe carrier arms whereby the, shell is held during its rearward movement between theextractor and 'the bottoms of said arms, means carried by the slide to move the carrier arms down to eject the shell, cartridge sto s coperatin'g' with the slide todeliver a. resh cartridge above the carrier arms, means carried by the slide to elevate said arms to present the cartridgc to the chamber, and means by which the breech-block passes between the carrier armsin its forward movement. v Y

1?. In a firearm, the combination of areeeiver, a barrel, a magazine, a slide, a ln-eech-bloek thereon, a carrier pivotcd near the rear of the receiver and having arms at the' sides thereof, said arms having converging portions, an extractor carried by the breech-lilork, means on the breech block to elevate the front ends of the carrier arms whereby the shell is held during its rearward movement between the extractor and the bottoms of said arms, means carried by the slide to move the carrier arms down to Y eject the shell, cartridge stops cooperating carrier arms in-its forward movement.

'114. -In'a firearm, the combination of a receiver, a' barrel, -a .magazine, a slide, a lbreech-block thereon, a carrier pivotcd near the rearL of the receiver and having arms -atv the sides thereof, said arms'having converging portions, a shell-guiding surface in the receiver `rearward of the chamber, an extractorv carried" byy the breech-block, means on .the breeeh-block to elevate the front ends of --the carrier `arms whereby the shell is held during its rearward movement between the extractor and the bottoms of said arms, means carried by the slide to move the carri( r arms down to eject the shell, cartridge stops cooperating with the slide to deliver a fresh -cartridge above the carrier arms, vmeans carried by theslide to elevate said arms to present the cartridge to the cham- ,ber,and means by which the l)i'ee,ch bloclc passes between the carrier arms in its forward movement.

15. In al firearm, the combination of a receiver, a'slide, a carrier, a breech-block, a l

lower front face of the breech-block, said piece having a slot engaging a pivot pinin the breech-block above the firing pin, an exe tractor-spring coiled about said pin-and having an en d engaging against the breechblock, and a longer, incnrved end engaging the curve in said extractor-piece.

17. In a firearm, the'combination of a receivei-,a slide, a breech-block, a carrier havingarms at the sides of the receiver, the

receiver being provided with a bottom-ejection-opening, .the receiver walls being re' ccssed to pern'nt'passage ot the head of the breech-block between the iront ends of Athe cirlrier during `the forward movement of the 's ic e. Y

1.8. In a firearm,the'combination of a receiver, a slide, a breech-block, a carrier, a trigger-plate, a hammer` pivotcd therein, a spring-operated strut connected with the hammer, a slide lock to cooperate with the slide, and means actuated by Asaid strut to operate the slide lock. 19. In a irearm, the combination of a Teceiver, a slide, a breechblock, a carrier, a

trigger-plate, a hammer pivoted therein, a strut pivotcd to the hammer, a main spring actuating the strut, a slide lock to engage the slide, a cam on said strut, and a spring y disengaged position.

the slide, a'cam on said strut, a spring actus' ated by the cam to urge the slide lock to disengaged position, a spring fastened to the slide lock and having a part turned in to engage said cam.

21. In a firearm, the combination of a re? celver, a magazine, a sllde handle thereon, a'

slide Within the receiver, a slide bar connected to the handle and entering the receiver, a pin monted in the slide for lateral l movement and adapted to'engage a hole in the slide bar, Asaid pin being exposed at a point below the slide, and means for fastening the pin in engagement with the slide bar.

' 22. In a firearm, the combination oa receiver, a slide, a trigger-plate, a hammer' th^reon having a trigger-notch, a trigger having an extension to engage said triggeractuated -by the cam to urge the slide lock to notch, a slide lock piece having a Sear-notch, a tooth on the hammer to engage said notch, said Sear-notch and tooth being placed so that when in engagement there is clearance between the trigger and its notch, and springs for actuating the slide lock piece, a finger-piece extending downwardly from the slide lock piece for releasing the slide in manipulating the arm.

23. In Aa firearm, the combination of a receiver, a slide, a trigger-plate, a hammer thereon having a trigger-notch, a trigger having an extension to'engage said triggernotch, a slide lock piece having asear-n'otch, a tooth on the hammer to engage said notch, said Sear-notch and tooth being placed so that when in engagement there is clearance between the trigger and `its notch, and springs for actuating the slide lock piece, a lslide stop member carried by said slide-lock piece, vand a cam carried by the slide to actuate said member.

- JOHN M. BROWNING. Witnesses:

V. A. BROWNING, M. A. Woon.