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US1984443A - Firearm - Google Patents

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Publication number
US1984443A
US1984443A US643976A US64397632A US1984443A US 1984443 A US1984443 A US 1984443A US 643976 A US643976 A US 643976A US 64397632 A US64397632 A US 64397632A US 1984443 A US1984443 A US 1984443A
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United States
Prior art keywords
bolt
receiver
breech
breech bolt
locking
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Expired - Lifetime
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US643976A
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Carl G Swebilius
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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F41—WEAPONS
    • F41A—FUNCTIONAL FEATURES OR DETAILS COMMON TO BOTH SMALLARMS AND ORDNANCE, e.g. CANNONS; MOUNTINGS FOR SMALLARMS OR ORDNANCE
    • F41A3/00—Breech mechanisms, e.g. locks
    • F41A3/12—Bolt action, i.e. the main breech opening movement being parallel to the barrel axis
    • F41A3/36—Semi-rigid bolt locks, i.e. having locking elements movably mounted on the bolt or on the barrel or breech housing
    • F41A3/38—Semi-rigid bolt locks, i.e. having locking elements movably mounted on the bolt or on the barrel or breech housing having rocking locking elements, e.g. pivoting levers or vanes
    • F41A3/42—Semi-rigid bolt locks, i.e. having locking elements movably mounted on the bolt or on the barrel or breech housing having rocking locking elements, e.g. pivoting levers or vanes hand-operated
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F41—WEAPONS
    • F41A—FUNCTIONAL FEATURES OR DETAILS COMMON TO BOTH SMALLARMS AND ORDNANCE, e.g. CANNONS; MOUNTINGS FOR SMALLARMS OR ORDNANCE
    • F41A15/00—Cartridge extractors, i.e. devices for pulling cartridges or cartridge cases at least partially out of the cartridge chamber; Cartridge ejectors, i.e. devices for throwing the extracted cartridges or cartridge cases free of the gun
    • F41A15/12—Cartridge extractors, i.e. devices for pulling cartridges or cartridge cases at least partially out of the cartridge chamber; Cartridge ejectors, i.e. devices for throwing the extracted cartridges or cartridge cases free of the gun for bolt-action guns
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F41—WEAPONS
    • F41A—FUNCTIONAL FEATURES OR DETAILS COMMON TO BOTH SMALLARMS AND ORDNANCE, e.g. CANNONS; MOUNTINGS FOR SMALLARMS OR ORDNANCE
    • F41A19/00—Firing or trigger mechanisms; Cocking mechanisms
    • F41A19/06—Mechanical firing mechanisms, e.g. counterrecoil firing, recoil actuated firing mechanisms
    • F41A19/25—Mechanical firing mechanisms, e.g. counterrecoil firing, recoil actuated firing mechanisms having only slidably-mounted striker elements, i.e. percussion or firing pins
    • F41A19/27—Mechanical firing mechanisms, e.g. counterrecoil firing, recoil actuated firing mechanisms having only slidably-mounted striker elements, i.e. percussion or firing pins the percussion or firing pin being movable relative to the breech-block
    • F41A19/29—Mechanical firing mechanisms, e.g. counterrecoil firing, recoil actuated firing mechanisms having only slidably-mounted striker elements, i.e. percussion or firing pins the percussion or firing pin being movable relative to the breech-block propelled by a spring under tension
    • F41A19/30—Mechanical firing mechanisms, e.g. counterrecoil firing, recoil actuated firing mechanisms having only slidably-mounted striker elements, i.e. percussion or firing pins the percussion or firing pin being movable relative to the breech-block propelled by a spring under tension in bolt-action guns
    • F41A19/31—Sear arrangements therefor
    • F41A19/32—Sear arrangements therefor for catching the percussion or firing pin after each shot, i.e. in single-shot or semi-automatic firing mode
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F41—WEAPONS
    • F41A—FUNCTIONAL FEATURES OR DETAILS COMMON TO BOTH SMALLARMS AND ORDNANCE, e.g. CANNONS; MOUNTINGS FOR SMALLARMS OR ORDNANCE
    • F41A9/00—Feeding or loading of ammunition; Magazines; Guiding means for the extracting of cartridges
    • F41A9/01—Feeding of unbelted ammunition
    • F41A9/06—Feeding of unbelted ammunition using cyclically moving conveyors, i.e. conveyors having ammunition pusher or carrier elements which are emptied or disengaged from the ammunition during the return stroke
    • F41A9/09—Movable ammunition carriers or loading trays, e.g. for feeding from magazines
    • F41A9/10—Movable ammunition carriers or loading trays, e.g. for feeding from magazines pivoting or swinging
    • F41A9/13—Movable ammunition carriers or loading trays, e.g. for feeding from magazines pivoting or swinging in a vertical plane
    • F41A9/16—Movable ammunition carriers or loading trays, e.g. for feeding from magazines pivoting or swinging in a vertical plane which is parallel to the barrel axis
    • F41A9/17—Movable ammunition carriers or loading trays, e.g. for feeding from magazines pivoting or swinging in a vertical plane which is parallel to the barrel axis mounted within a smallarm

Definitions

  • the locking bolt carries a ⁇ pivotedfsearr ⁇ which engagesl the firing pin4 slidably ⁇ mounted oni the breechl bolt either toliold the same :againstaccidentali ⁇ ene ⁇ gage'mentfwith a cartridge.
  • Fig. 1. isa fragmentaryperspective vi'ew ⁇ of a rie'embo'dying the invention; 1 l Y Fig. 2 fis a fragmentaryjside elevation partly broken away; ⁇ l .p
  • Fig. 3 is avertical section. through the receiver; Fig. 4 fis a section onthe1ine4f-41orrig.3*; y Fig. 5 is a vfragmentary..perspective'vievv-of the breechtoit; ⁇ vu l Figs. 6 tof 8 inclusive are sections similar to Fig. 3 with the parts in diierent positions;
  • Fig. 9 is a section on the line 9-9 ofli'ig. 3'; 2, Fig'. 1o isa perspective yiew'partjlybrokengaway of the lockingbolt,.an'd I M c Fig. 11 is. aperspectjve View .partly broken away 4ofthe breechlb'o'lt., j
  • The. receiver lofis providedqrgat 'itsront end witha recess in whichcisgreceive'l lltherear end of]l the barrel ⁇ 1 ⁇ 1Tandfthe receivenntogether with the ⁇ barrel;Y aredetachably i mounted on theA stock 12;4 the stock being grooved to receive thereceiver and. rear portion of the barrel and azthumb screw- 13 being provided: to hold the stock and. receiver in! assembledxrelation;
  • the receiver isi generally cylindrical and -is provided with'a cartridge receiving and ejecting aperture 14;
  • the breech bolt 15 is. ofgeneralicylindrical contour. and is'slidably mountedy in the receiver 1.10'.
  • Thelocking bolt -16 is-pivotally-carrieolbyfthebreech bolt and ifs-arranged to swing into "and: out of. a. recess the breech bolt 15.
  • the lockingibolt has aI pintle' portion Y1'7 which4 is received. in 'a correspondingly shaped transverse grooveinthe' breech bolt to hinge the lockingbolt to the breech bolt.
  • the locking boltf carries an ann 18 ⁇ havng'a, short portion' extending parallel tolv thehingetaxis of thebreech bolt; and-a long portion extending generally downward .at right angles :to the ⁇ .short w portion, the ⁇ long. portion terminating in a knob 19.
  • Thearznflil projects through-af slot 20; in the. breech bolt, thislslot being provided' ⁇ at its front end withav shallowiIlOtch 2'1.- A lngf15a on the breechbolt extends into the slot 20"'and prevents4 rotation of the breech bolt. At. the bottom. of the receiventhe wall is cutaway to?
  • a ring pinv 23 is, slidably mounted ion the breech bolt 15 and except when in ring position is contained wholly within thebreech boltexcept for its rearV end which extends beyond the rear end of thebreechbolt- A -springf24 interposed between shoulders onthe firing pinfl and a. plug 215.threaded'into the rear end or" the breech bolt eirtsjorcer on the ringpin tendingto;moveit to firing; position.
  • the firing pin is recessed to form a. shoulder"26 at the end'of an oblique.
  • the shoulder 26 forms a forwardly facing ⁇ notclr'26a. .i l mounted' in the locking boltitA lip 29a. at' the rear end of ⁇ the searr is arranged to engage vthe oblique surface 27 of the firing pin upon upward swing of thelocking bolt 1f6 withiniits recess to move the ringpin rearwardly until ⁇ the lip 29a clears the shoulder 26 whereupon the iii-ing pin moves forwardv slightly to seat the .lip29a. in the notch 26a;
  • the sear ' is alsoprovided with a. shoulder 30 which is adapted to engage the shoulder 28 ofV the ring pin to. hold. the latter in cocked position. A springl tends to press the rear end of thevsear toward the firing pin.
  • a trigger 32 is pivotally supported in a yoke 33 fastened to the receiver 10.
  • a trigger bar 34 has its rear end lying on the top face of the trigger ⁇ 32 and has its front end received in a recess in the forward part of the receiver, the forward end of the trigger bar being loosely held in its recess by a stud threaded into the receiver and acting to hold the barrell 11 in place and to re-
  • the trigger bar is pro- ,y vided with an offset 36 which is adapted to 'engage ceive the thumb screw 13.
  • Fig. 3 discloses the arrangement of the breech bolt, locking bolt, sear, iiring'pin, trigger and triglger bardirectly after iiring of the rifle. ⁇
  • the rifle is unbreeched and the empty shell ejected by rearward pull on the knob 19.
  • Initial rearward movement of the knob 19 lifts the lockingbolt 16 out of the recess 22 and into the breech bolt.
  • the lip l290i rides over the oblique surface 27 thereby retracting the firing pin 23 fagainst the action of the spring 24 until the sear clears the shoulder 26 whereupon the firing pin is moved forwardly until the sear engages the rear face of the notch 26a (Fig. 6).
  • the rifle is cocked by drawing.- the firing pin rearwardly by means of the knob 37 against the action of its spring until theshoulder 28 rides over the shoulder 26 and these two shoulders ⁇ are brought into locking relationship by thev spring 31 in which'po'sition the locking bolt is locked in its recess 22 (Fig. 8)'.
  • Rearward'pullzon the trigger 32 lifts the rear end of the trigger bar 34, thereby bringing the-lprojection'36 linto engagement with the front end of the sear to lift the same andv disengage the shoulde'rf() from-the shoulder 28 of the iiring pin, thereby releasing.
  • the forward lower portion of the breech bolt is cut away to provide a pair of ⁇ spaced longitudinal ribs 39 and between these ribs is arranged the ejector 40 which, as the breech bolt is drawn back, engages the empty shellcarried by .tolimit the rearward movement of the breech bolt, the ejector at such time being clear of the vfront end of the bolt to permit the required movement of ,theejecton n
  • the ejector thus serves as the breech bolt stop.
  • a cartridge guide 45- is provided in thebottom of the receiver.
  • Thiscartridge guide is grooved to receive a cartridge and has a portion extending through the same slotin the bottom of the receiver as the ejector.
  • kA'spring 46 underlies the front end of the guide and the guide is-tiltably supported at its rear end, the spring 46 tending to hold the. guide in the position shown in Fig. 7 when the breechbolt is retracted.
  • the lower portion ofthe cartridge guide is provided with a recess 45a into which extendsaprojection 34a on the trigger bar 34, this arrangement permitting tilting ⁇ movement of the guide.
  • the knob 37 is rotatably mounted on lthefend of the firing pin and is provided with a longitudinal groove 47 which normally registers with a pin 48 carried bythe plug 25. When the firing pin has been pulled back tov ⁇ cocked position, the knob 37 may be rotated a portion of a turn, thus moving the groove 47 out of register with the pin 48, thereby preventing. forwardl movement of the ⁇ firing pin.
  • 'Ihe breech bolt assembly may b e removed from the receiver by simultaneously pulling on the trigger and the knob 19.
  • .Pull on thetrigger with the breech bolt" retracted causes the ejector to be disposed to such extent that the vshoulders 44 are held out of engagementl with the shoulders 43, this positionofthe ejector being effected by engagement of the trigger bar with the free end of the ejector.
  • "It is ofcourse to .be .understood that various ymodiicatif'ir'is may be made in the structure above described, without in any way departing from the spirit of the invention as defined in the appended claims.
  • a firearm a receiver, a non-rotatable cylindrical breech bolt slidably mounted in said receiver, a locking bolt pivotally carried by said breech bolt and adapted toy be contained within said breech bolt, said receiver having a slot into which said locking bolt'projects when in locking position, and means bodily translatable parallel to the direction of movement of said breech bolt
  • a spring 42 is' for actuating said locking bolt andreciprocating said breech bolt.
  • a receiver In a rearm, a receiver, a cylindrical breech bolt slidably ⁇ mounted in ⁇ said. receiver, means preventing rotation of said breech bolt, a locking bolt pivoted to said breech bolt' and adapted to be contained within said breech bolt, said receiver having al slot into which said locking bolt pro- Y jects when in locking position, and means bodily translatable parallel to the direction of movement of said breech bolt for swinging said locking bolt and reciprocating said breechbolt.
  • a receiver having a longitudinal slot, a cylindrical breech bolt slidably mounted in said receiver, ⁇ a locking bolt pivoted to said breech bolt and adapted to be contained within saidbreech bolt, said receiver having a slot into which said locking bolt projects when in locking position, and an arm carried by said locking bolt,A said arm being bodily translatable i parallel to the direction of movement of said ⁇ breech bolt and having a portion parallel to the axis of said locking boltand a second portion perpendicular to said first portion, said arm being operable bypull on the end thereof parallel to the direction of movement of said breech bolt to actuate said locking bolt Aand reciprocate said breech bolt.
  • a receiver ⁇ having a longitudinal slot, a breech bolt slidably mounted in said receiver, a locking bolt pivoted to said breech bolt, an arm carried by said locking bolt, said arm projecting through said slot, a firing Ypinrslidably mounted on said breechbolt, a sear pivotally mounted on said locking bolt, inter-engaging means on said sear andv ringrpin to hold the latter in cocked position, and trigger means for disengagingv said sear from said firing pin.
  • a receiver having a longitudinal slot, a breech bolt slidably mounted in said re- Y DCver, ya locking bolt pivoted to said breech bolt,
  • a receiver In a nrearm, a receiver, a breech bolt slidably mounted in said receiver,v a locking bolt pivoted vto said breech bolt, a firing pin slidably mounted on said breech bolt, a sear pivotally mounted on l said locking bolt, inter-engaging means on said sear and firing pin, ⁇ a trigger bar 'pivoted at one end to the receiver and having means engageable with said sear, and a trigger engaging the free vend of said bar to lift the same into engagement with the sear.
  • afreceiver a breech ⁇ bolt slidably mounted in ⁇ said receiver, a locking bolt pivoted'to said breech bolt, aifiring pin slidably mounted on said breech bolt, a sear ⁇ 'pivotally mounted on said locking bolt, inter-engaging means on said sear and firing pin to preventk movement of the ring pin into firing position, additional inter-engaging means on said sear and firing pin for holding the ring pin in cockedv position, said iirst named means being rendered inoperative upon movement of the firing pin into cocked position.
  • a receiver having a longitudinal slot, a breech bolt slidably mounted in said receiver, a locking bolt pivoted to said breech bolt, a recess in the receiver to receive the free end of said'locking bolt, an arm carried by said locking bolt and projecting through said slot, a spring actuatedfiring pin slidably mounted on said breech bolt, a sear pivotally mounted on said locking bolt, inter-engaging means on said sear and firing pin for preventing movement of the firing pin into firing position, additional inter-engaging means on said sear and firing pin for holding the latter in cocked position, said first named means being rendered inoperative upon movement of the firing pin into cocked position, a trigger bar pivoted at one end to the receiver and being engageable with said sear to disengage the same from the firing pin, and a trigger engaging the free end of said bar to lift the same into engagement with said sear.
  • a receiver having a bottom slot, a breech bolt slidably mounted in said receiver, an ejector comprising a base portion loosely fulcrumed ⁇ in the outer wall of the receiver, and a shell engaging portion extending through said slot into the receiver, and spring means slot, a breech bolt slidably mounted in said receiver, an ejector comprising a base portion loosely fulcrumed in the outer wall of the receiver, a shell engaging portion extending through said slot into the receiver, spring means pressing said ejector inwardly of the receiver and consti--4 tuting the sole means for holding the ejector in position, and inter-engaging shoulders on said breech bolt and ejector for limiting rearward movement of the breech bolt.
  • a receiver having a bottom slot, a breech bolt slidably mounted in said receiver, an ejector comprising a base portion engaging the outer wall of the receiver, a shell engaging portion extending through said slot into the receiver, a pivoted trigger bar, and a spring interposed between said trigger bar and ejector.
  • a receiver having a bottom slot, a breech bolt slidably mounted in said receiver, an ejector comprising a base portion engaging the outer wall of the receiver, a shell engaging portion extending through said slot into the receiver, a pivoted trigger bar, a spring interposed between said trigger bar and ejector, and
  • a receiver having a bottom slot, a cartridge ⁇ guide resting on the bottom of said receiver and having a portion extending through said slot, a spring underlying the front end of the guide, a pivoted trigger bar, and means on ⁇ said trigger bar engaging said extending portion to constitute a fulcrum for said guide.

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Description

Dec- 18, 1934- c. G. swralalLllJs` FIREARM Filed ov. 25, 1952 2 Sheets-Sheet l l NNTOR.
; ATTORNEYS Dec. 1 8, 1934. c. G. swEBlLlus 1,984,443
` FIREARM Filed Nov. 23, 1932 2 Sheets-Sheet 2 IN EN OR ZTTORNEYS Patented De.1s, 1934 Canje@swebiliuhrnwnaxem.(1mm.` i. `App1icati01iNovember2s, 19432.seriamhfeiaevel i riolaimsfv (01.42-16) invention. I'f'elates` to firearms and. more especially to sporting riflessl An object of vthis inventionfsa straight pull breech action reprovidedT with positive means to prevent accidental dischargexor the riiile.
In a rifle embodying theuinvention, they breech bolt is sl'idablyfmount'edfin` thereceiver and carries a locking bolt which swings into a recess' inthe receiver to lock up.the=action. ,The locking bolt carries a` pivotedfsearr `which engagesl the firing pin4 slidably `mounted oni the breechl bolt either toliold the same :againstaccidentali` ene` gage'mentfwith a cartridge. in the chamber or to hold it inlcockedfposition; s 1 l l The rin'e is cocked` by pulling'the firing pin rearwardly, thereby"changing.thezengagementof the scar and ringV pin fromsaf'ety to. cocked.I position andi locking the* locking. bolt in its: recess. Pull oni-the trigger disengages these'ar'fronrthe firing pin anda spring thrusts the-iiring'pinforward into engagement with the :cartridgeto nre the same, the locking bolt being' at thefsame time released. The flocking b'oltfis provided with' a handle' which isl pulled 'straight` back. to first lift the locking bolt out of? its'` recess intol the breech bolt to bring the-scar intosafetypositionlengagement "withthelring' pinand` then draw back the breech bolt `to `openn the-vbreolfr` and eject the empty shell', 0n forward .movement of the breech boltl to carry" a` Vfresh cartridge into the 'chamber/and close the breechgfthe locking bolt is brought-again into its `recess with the' sear stillin safety position. engagement with the A-ring pin. "'Ifhis engagement broken only upon move# rf ment of the pininto cocked-@position and accompanying iockingof 'tneilieein-ng 1to1-t `in its recess. r1 n Other' objects, novel-features Vand`advantage*s of this invention-will be "apparent from the Vfollowing specication 'amiaccompanying drawings, wherein: jj.
Fig. 1. isa fragmentaryperspective vi'ew` of a rie'embo'dying the invention; 1 l Y Fig. 2 fis a fragmentaryjside elevation partly broken away;` l .p
Fig. 3 is avertical section. through the receiver; Fig. 4 fis a section onthe1ine4f-41orrig.3*; y Fig. 5 is a vfragmentary..perspective'vievv-of the breechtoit;` vu l Figs. 6 tof 8 inclusive are sections similar to Fig. 3 with the parts in diierent positions;
Fig. 9is a section on the line 9-9 ofli'ig. 3'; 2, Fig'. 1o isa perspective yiew'partjlybrokengaway of the lockingbolt,.an'd I M c Fig. 11 is. aperspectjve View .partly broken away 4ofthe breechlb'o'lt., j The. receiver lofis providedqrgat 'itsront end witha recess in whichcisgreceive'l lltherear end of]l the barrel `1`1Tandfthe receivenntogether with the` barrel;Y aredetachably i mounted on theA stock 12;4 the stock being grooved to receive thereceiver and. rear portion of the barrel and azthumb screw- 13 being provided: to hold the stock and. receiver in! assembledxrelation;
.The receiver isi generally cylindrical and -is provided with'a cartridge receiving and ejecting aperture 14; The breech bolt 15 is. ofgeneralicylindrical contour. and is'slidably mountedy in the receiver 1.10'. Thelocking bolt -16 is-pivotally-carrieolbyfthebreech bolt and ifs-arranged to swing into "and: out of. a. recess the breech bolt 15. The lockingibolt has aI pintle' portion Y1'7 which4 is received. in 'a correspondingly shaped transverse grooveinthe' breech bolt to hinge the lockingbolt to the breech bolt. The locking boltfcarries an ann 18 `havng'a, short portion' extending parallel tolv thehingetaxis of thebreech bolt; and-a long portion extending generally downward .at right angles :to the` .short w portion, the `long. portion terminating in a knob 19. Thearznflil projects through-af slot 20; in the. breech bolt, thislslot being provided' `at its front end withav shallowiIlOtch 2'1.- A lngf15a on the breechbolt extends into the slot 20"'and prevents4 rotation of the breech bolt. At. the bottom. of the receiventhe wall is cutaway to? fornire;v recess `22 into whichl the freeV endl-of` Vthe locking lich-,116` swings' when the breech boltvis in its forward position, the locking'bolt in thisfposi; ti'on preventing rearwardl movement of the breech bolt. Rearward pull on. the knob `19 lifts ,the locking bolt `up out of ,the recess 22. and'intofthe recess, ini the breech fbolt. l i j A ring pinv 23 is, slidably mounted ion the breech bolt 15 and except when in ring position is contained wholly within thebreech boltexcept for its rearV end which extends beyond the rear end of thebreechbolt- A -springf24 interposed between shoulders onthe firing pinfl and a. plug 215.threaded'into the rear end or" the breech bolt eirtsjorcer on the ringpin tendingto;moveit to firing; position. The firing pin is recessed to form a. shoulder"26 at the end'of an oblique. surface 257' and is also provided witha lug28' having afshoulder28a arrangedA in advance 'of 'the shoulider 26. The shoulder 26 forms a forwardly facing`notclr'26a. .i l mounted' in the locking boltitA lip 29a. at' the rear end of `the searr is arranged to engage vthe oblique surface 27 of the firing pin upon upward swing of thelocking bolt 1f6 withiniits recess to move the ringpin rearwardly until` the lip 29a clears the shoulder 26 whereupon the iii-ing pin moves forwardv slightly to seat the .lip29a. in the notch 26a; The sear 'is alsoprovided with a. shoulder 30 which is adapted to engage the shoulder 28 ofV the ring pin to. hold. the latter in cocked position. A springl tends to press the rear end of thevsear toward the firing pin. f A
PATE NT orrlCi-:g-vv i chamber.
A trigger 32 is pivotally supported in a yoke 33 fastened to the receiver 10. A trigger bar 34 has its rear end lying on the top face of the trigger `32 and has its front end received in a recess in the forward part of the receiver, the forward end of the trigger bar being loosely held in its recess by a stud threaded into the receiver and acting to hold the barrell 11 in place and to re- The trigger bar is pro- ,y vided with an offset 36 which is adapted to 'engage ceive the thumb screw 13.
the front end of the sear 29 to turn thesame against the action of the spring, 31upon upward movement of the rear end of the trigger bar I34 eifected by pull on the trigger 32. .I n
Fig. 3 discloses the arrangement of the breech bolt, locking bolt, sear, iiring'pin, trigger and triglger bardirectly after iiring of the rifle.` The rifle is unbreeched and the empty shell ejected by rearward pull on the knob 19. Initial rearward movement of the knob 19 lifts the lockingbolt 16 out of the recess 22 and into the breech bolt. During such movement of the locking bolt, the lip l290i rides over the oblique surface 27 thereby retracting the firing pin 23 fagainst the action of the spring 24 until the sear clears the shoulder 26 whereupon the firing pin is moved forwardly until the sear engages the rear face of the notch 26a (Fig. 6). In this relationship of the sear and liring pin, the latter is held short of its ring position. Further pull on the knob 19 draws back the breech-bolt (Fig. 7), the empty shell being ejected by means later to be described and the rearward movement ofthe breech bolt being. limited by means later to be described. 'The rifle is then breeched` by forward push on the knob 19 which slideslthe breech bolt forwardly to its limit of movement and the ultimate movement of the knob 19 swings the locking bolt back again into the recess 22, the rear end of the sear being retained inthe notch 26a and holding the. firing pin against forward movement into ring position. The rie is now locked against accidental discharge and the gun may be unbreeched at any time by rearward pull on the knob 19. it
The rifle is cocked by drawing.- the firing pin rearwardly by means of the knob 37 against the action of its spring until theshoulder 28 rides over the shoulder 26 and these two shoulders` are brought into locking relationship by thev spring 31 in which'po'sition the locking bolt is locked in its recess 22 (Fig. 8)'. Rearward'pullzon the trigger 32 lifts the rear end of the trigger bar 34, thereby bringing the-lprojection'36 linto engagement with the front end of the sear to lift the same andv disengage the shoulde'rf() from-the shoulder 28 of the iiring pin, thereby releasing.
the latterwhich is thrust forward by its'spring 24 into engagement with the cartridge to fire the same (Fig.' 3) the sear resuming its position with its rear face in contact with the oblique surface 27. Wx" 'I'he front end of the breech bolt is. provided with the usual spring actuated extractor 38. which removes theempty shells from A the cartridge The forward lower portion of the breech bolt is cut away to provide a pair of `spaced longitudinal ribs 39 and between these ribs is arranged the ejector 40 which, as the breech bolt is drawn back, engages the empty shellcarried by .tolimit the rearward movement of the breech bolt, the ejector at such time being clear of the vfront end of the bolt to permit the required movement of ,theejecton n The ejector thus serves as the breech bolt stop. When the breech bolt is in its forward position, the ejector is forced downwardly against the action of the spring 42 as shown in Fig. 6 and when the breech bolt is in its rear position, the spring-42 forces the ejector into the position shown in Fig.`7 in which position it prevents further `retraction of the breech bolt.
A cartridge guide 45- is provided in thebottom of the receiver. Thiscartridge guide is grooved to receive a cartridge and has a portion extending through the same slotin the bottom of the receiver as the ejector. kA'spring 46 underlies the front end of the guide and the guide is-tiltably supported at its rear end, the spring 46 tending to hold the. guide in the position shown in Fig. 7 when the breechbolt is retracted. The lower portion ofthe cartridge guide is provided with a recess 45a into which extendsaprojection 34a on the trigger bar 34, this arrangement permitting tilting `movement of the guide. .g .Upon forward movement of the breech bolt, it pushes the cartridge from the guide into the chamber and swings the guide into the position shown in Fig. 8. Additional safety means are provided for locking the ringipin in cockedposition. The knob 37 is rotatably mounted on lthefend of the firing pin and is provided with a longitudinal groove 47 which normally registers with a pin 48 carried bythe plug 25. When the firing pin has been pulled back tov `cocked position, the knob 37 may be rotated a portion of a turn, thus moving the groove 47 out of register with the pin 48, thereby preventing. forwardl movement of the `firing pin. AftertheV firing pin has been set in cocked position, 'it canf be: returned tosafety position by pullingthe' trigger whileat .the same time holdingthe firingypin and letting it go forward slowly. Under such conditions, the sear will be elevated tobring the lip.29a rlinto alignment with the notch 26a and prevent movementof the iiring pin into firing position.y
'Ihe breech bolt assembly may b e removed from the receiver by simultaneously pulling on the trigger and the knob 19. .Pull on thetrigger with the breech bolt" retracted causes the ejector to be disposed to such extent that the vshoulders 44 are held out of engagementl with the shoulders 43, this positionofthe ejector being effected by engagement of the trigger bar with the free end of the ejector. "It is ofcourse to .be .understood that various ymodiicatif'ir'is may be made in the structure above described, without in any way departing from the spirit of the invention as defined in the appended claims.
I claim:
1, In a firearm, a receiver, a non-rotatable cylindrical breech bolt slidably mounted in said receiver, a locking bolt pivotally carried by said breech bolt and adapted toy be contained within said breech bolt, said receiver having a slot into which said locking bolt'projects when in locking position, and means bodily translatable parallel to the direction of movement of said breech bolt A spring 42 is' for actuating said locking bolt andreciprocating said breech bolt.
2. In a rearm, a receiver, a cylindrical breech bolt slidably `mounted in `said. receiver, means preventing rotation of said breech bolt, a locking bolt pivoted to said breech bolt' and adapted to be contained within said breech bolt, said receiver having al slot into which said locking bolt pro- Y jects when in locking position, and means bodily translatable parallel to the direction of movement of said breech bolt for swinging said locking bolt and reciprocating said breechbolt.
3. In a firearm, a receiver having a longitudinal slot, a cylindrical breech bolt slidably mounted in said receiver,` a locking bolt pivoted to said breech bolt and adapted to be contained within saidbreech bolt, said receiver having a slot into which said locking bolt projects when in locking position, and an arm carried by said locking bolt,A said arm being bodily translatable i parallel to the direction of movement of said `breech bolt and having a portion parallel to the axis of said locking boltand a second portion perpendicular to said first portion, said arm being operable bypull on the end thereof parallel to the direction of movement of said breech bolt to actuate said locking bolt Aand reciprocate said breech bolt. l
4. In "a rearm, a receiver` having a longitudinal slot, a breech bolt slidably mounted in said receiver, a locking bolt pivoted to said breech bolt, an arm carried by said locking bolt, said arm projecting through said slot, a firing Ypinrslidably mounted on said breechbolt, a sear pivotally mounted on said locking bolt, inter-engaging means on said sear andv ringrpin to hold the latter in cocked position, and trigger means for disengagingv said sear from said firing pin.
In a iirearrn, a receiver having a longitudinal slot, a breech bolt slidably mounted in said re- Y ceiver, ya locking bolt pivoted to said breech bolt,
. ably mounted in said receiver, alocking bolt piv oted to said breech bolta sear pivotally mounted on said locking bolt, a forwardly `facing notch in said firing pin,` and means on said sear engaging said notch to prevent movement of the firing pin into firing position. L I
7. In a nrearm, a receiver, a breech bolt slidably mounted in said receiver,v a locking bolt pivoted vto said breech bolt, a firing pin slidably mounted on said breech bolt, a sear pivotally mounted on l said locking bolt, inter-engaging means on said sear and firing pin,` a trigger bar 'pivoted at one end to the receiver and having means engageable with said sear, and a trigger engaging the free vend of said bar to lift the same into engagement with the sear.
8. In a firearm, afreceiver, a breech `bolt slidably mounted in` said receiver, a locking bolt pivoted'to said breech bolt, aifiring pin slidably mounted on said breech bolt, a sear `'pivotally mounted on said locking bolt, inter-engaging means on said sear and firing pin to preventk movement of the ring pin into firing position, additional inter-engaging means on said sear and firing pin for holding the ring pin in cockedv position, said iirst named means being rendered inoperative upon movement of the firing pin into cocked position.
l9. In a firearm, a receiver having a longitudinal slot, a breech bolt slidably mounted in said receiver, a locking bolt pivoted to said breech bolt, a recess in the receiver to receive the free end of said'locking bolt, an arm carried by said locking bolt and projecting through said slot, a spring actuatedfiring pin slidably mounted on said breech bolt, a sear pivotally mounted on said locking bolt, inter-engaging means on said sear and firing pin for preventing movement of the firing pin into firing position, additional inter-engaging means on said sear and firing pin for holding the latter in cocked position, said first named means being rendered inoperative upon movement of the firing pin into cocked position, a trigger bar pivoted at one end to the receiver and being engageable with said sear to disengage the same from the firing pin, and a trigger engaging the free end of said bar to lift the same into engagement with said sear.
10. In a firearm, a receiver having a bottom slot, a breech bolt slidably mounted in said receiver, an ejector comprising a base portion loosely fulcrumed `in the outer wall of the receiver, and a shell engaging portion extending through said slot into the receiver, and spring means slot, a breech bolt slidably mounted in said receiver, an ejector comprising a base portion loosely fulcrumed in the outer wall of the receiver, a shell engaging portion extending through said slot into the receiver, spring means pressing said ejector inwardly of the receiver and consti--4 tuting the sole means for holding the ejector in position, and inter-engaging shoulders on said breech bolt and ejector for limiting rearward movement of the breech bolt.
12. In a firearm, a receiver having a bottom slot, a breech bolt slidably mounted in said receiver, an ejector comprising a base portion engaging the outer wall of the receiver, a shell engaging portion extending through said slot into the receiver, a pivoted trigger bar, and a spring interposed between said trigger bar and ejector.
13. `In a firearm, a receiver having a bottom slot, a breech bolt slidably mounted in said receiver, an ejector comprising a base portion engaging the outer wall of the receiver, a shell engaging portion extending through said slot into the receiver, a pivoted trigger bar, a spring interposed between said trigger bar and ejector, and
inter-engaging shoulders on said breech bolt and ejector for limiting rearward movement of the breech bolt.
' 14. In a firearm, a receiver having a bottom slot, a cartridge `guide resting on the bottom of said receiver and having a portion extending through said slot, a spring underlying the front end of the guide, a pivoted trigger bar, and means on `said trigger bar engaging said extending portion to constitute a fulcrum for said guide.
CARL G. SWEBILIUS.
US643976A 1932-11-23 1932-11-23 Firearm Expired - Lifetime US1984443A (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2715356A (en) * 1949-03-17 1955-08-16 Costruzioni Meccaniche Breda E Closing block with percussion safety for automatic guns

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2715356A (en) * 1949-03-17 1955-08-16 Costruzioni Meccaniche Breda E Closing block with percussion safety for automatic guns

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