US723706A - Magazine bolt-gun. - Google Patents

Magazine bolt-gun. Download PDF

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Publication number
US723706A
US723706A US1896593386A US723706A US 723706 A US723706 A US 723706A US 1896593386 A US1896593386 A US 1896593386A US 723706 A US723706 A US 723706A
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Grant
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Prior art keywords
bolt
cam
spring
pin
cartridge
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Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
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Samuel N Mcclean
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Samuel N Mcclean
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    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F41WEAPONS
    • F41AFUNCTIONAL FEATURES OR DETAILS COMMON TO BOTH SMALLARMS AND ORDNANCE, e.g. CANNONS; MOUNTINGS FOR SMALLARMS OR ORDNANCE
    • F41A15/00Cartridge 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
    • F41A15/12Cartridge 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
    • F41A15/14Cartridge 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 the ejector being mounted on or within the bolt; Extractors per se

Description

'PATENTBD MAR. 24, 190s.

9 BEETS-SHEBT 1.

S. N. MOGLEAN. MAGAZINE BOLT GUN. APPLIGATION FILED MAY ze, 189s.

l No. ,723,706.-

No MODEL.

4 Afl/V44! -..wat w ...Y Il

illlllilllllmui NNW PATBNTBD 161.43.24, 190s.

S. N. MUGLEAN. MAGAZINE BOLT GUN. APPLIGATIOH FILED MAY 28, 189e.

9 SHEETS-SHEET 2.

N0 MODEL.

No. 723,706. C PATENTBD MAR. 24, 1903.

s. N. MQULEAN.

MAGAZINE BOLT GUN.

APPLIGATION FILED um 28.1896. HoMoDBL. 9 sums-SHEET a.

'tlf p N l (arg N Muti? PATENTED MAR. 24, 1903.

S. N. MGGLEAN.

MAGAZINE BOLT GUN.

APPLIOATION FILED MAY 2s, 189e.

HO MODEL.

9 SHEETS-SHEET 4.

w O w PATENTED MAB.. 24, 1903.

' s. N.- MUGLNAN. MAGAZINE BULT GUN. APPLIOATION-FILED MAY 28, 1896.

EET 5.

-SH V1 INEMUVI..-

Y @We/227m" ITO MODEL.

No. 723,706. PATENTED MAR. 24, 1903. S. N. MGGLEAN. MAGAZINE BOLT GUN.

x?yLIoATloN FILED MAY 2s, me.

9 SHEETS-SHEET 6.

Ng.. .w

f/Z ....2 2.,. .2.. n 4...,... i mwWW//H ....f- ...1... ....2 5. ....1 .i m um. JQ

NO MODEL.

PATENTND MAR. 24,1903.

s. N. NIGGLEAN. MAGAZINE BOLT GNN.

APPLICATION FILED MAY' 28, 1896.

9 SHEETS-SHEET 7.

N0 MODEL No. 723.706. PATENTED MAR. 24, 1903.

S. N. MGGLEAN.

MAGAZINE BOLT GUN..

APPLmATwN FILED MAY 28, 189e.

N0 MODEL.

liee/2252: mazZ/f/eig PATENTED MAR. 24, 1903.

S. N. MOGLEAN.

MAGAZINE 130LI' GUN.

APPLIOATIONPILBD MAY 2s, 1896.

I0 MODEL.

9 SHEETS-SHEET 9.

@ye/Z??? dmmeznf @9 W -Z @SW SAMUEL N. MCCLEAN, OF WASHINGTON, IOWA.

, MAGAzrNE BOLT-GUN.

SPECIFICATLON forming patri'. 0f Letters Patent N0. 723,706; dated 4ilillarch 24, 1 903. Application tiled May 28,1896. Serial No. 593,386. lNoinodel.)

Be it known that I, SAMUEL N. MCCLEAN, a citizen of the United States, residing at Washington, in the county of Washington and State of Iowa, have invented a new and useful Improvement in' Breach-Loading Firel arms,of which the following is a specification.

My invention relates in the main, though not essentially as to all its features, to breechloading firearms of the magazine variety.

The more important objects of my improvement may be stated as follows: to provide means for automatically locking the weapon in its loaded condition and for retaining it locked until the lock shall be released by the discharge or by hand, thereby avoiding all danger from hang-fire cartridges; to provide a structural plan of the receiver, whereby it shall berendered light, but adequately strong and steady,by adapting it to receive the strain of the discharge in the line of greatest strength and resistit withfthe shearing and crushing strength of the metal and to limit the strain to a comparatively small area immediately behind the end of the barrel and by, making both the receiver and the bolt extra strong at their forward 'end portions with the hi-nder parts thereof formed as thin-walled and light tubes.; to provide a structural plan of the operating parts, employing a system of camguides to control positively through the reciprocating movementof an operating-handle Jthe actions and combinations of actions of the various mechanisms of the weapon, involving those for loading, firing, extracting, ejecting,and locking; to provide an improved construction of disappearing sight, to adapt it forgreater n icety of adjustment, and to protect ity against accident, and:k to improve the construction and mode of operation of the various parts of the weapon, notably the mechanism which controls the 1longitudinal and locking movements of the bolt-"that which controls the extraction and that which controls the trigger cut-ofE-to enable the user toemploy at will either th'e rapid or single .tire action of the weapon, the firing in'echans ism to prevent its release in any other than the fulll-loc'ked position of the bolt, the magazine cut-olf for converting the weapon from a repeater into a single loader, the cartridgefeed from the magazine to the barrel, and

other details of the veapon, all as hereinafter described, and pointed out in the claims.

Referring to the accompanying drawings, Figure l is a broken longitudinal sectional View of the firearm, showing parts of my im`- provement in side elevation assembled in the relative positions they attain when the bolt is withdrawn toits rearward position; Fig. 2, a similar view ofthe same with the parts assembled in their` `relative positions when the bolt is locked in its forward position; Fig. 3, a broken longitudinal sectional view of the mechanism, showing the parts as assembled in the rlocked `position of the bolt; Fig. 4, a view showing the receiver in longitudinal sectional elevation', Fig. 5, a section taken at the line u Fig. 6 and viewed-in thedirection of the arrow, showing the trigger-guard .and magazine; Fig. 6, a top plan view of the same; Fig. 7, a view in side elevation of lthe cartridge-holding carrier; Fig. 8, a plan view showing the same with its actuating cam-slide; Fig. 9, a section faken at theline 9 on Fig.l 10 and viewed in the direction of the arrow, showing in elevation lthe left side of the cartridge-holding end ofthe carrier; Fig. 10, an end view of the carrier; Fig. 11, a plan View showing the pivotal wedge and cam for spreading apart the bifurcated end forming the cartridge grip or.holder of the carrier; Fig.- 12, a view ofthe same in side elevation;l Fig. 13, a vi ew in side elevation of the carrier-controlling cam-slide; Fig. 14, a top view .of the same; Fig. 15, abroken section showing a bottom` plan View of the bolt in the receiver, parts'of the firing-pin-controlling mechanism, and the extractor mechanism; Fig. 16, a section taken at the line 16 on Fig. 15 and viewed in the direction ofthe arrow, showing features of the extractor-controlling mec anism with the extractor-s .unlockedFig 1-7, a view like that presented by Fig. 16, but showing another relationbf the parts witho the extractors locked; Fig. 18, a similar view, but showing still another relation e f parts; Fig.

19, a plan view of the extractors on their divided collar; Fig. 20, a section taken at the line 2O on Fig. 19 and viewed in the direction of thearrow; Fig. 21, a longitudinal sectional view showing abroken section of the barrel with one form of my improved vsafety mech- I locked condition until released by the discharge of the weapon; Fig. 22, a section taken at the line 22 on Fig. 21 and viewed in the direction of the arrow; Fig. 23,/a section taken at the lines 23 on Fig. 3 and Fig. 21 and viewed in thedirection of the arrows; Fig.24, a

perspective view showing the locking end of the safety mechanism; Fig. 25, asimilar View of a stop detail; Fig. 26, a vertical section of the bolt and its slide, taken von the plane 26 ot Fig. 27 and viewed in the direction of the arrow, showing mechanism connected with the bolt-operating slide for controlling the action of a firing-pin scar; Fig. 27, a plan view of the slide with the means thereon for engaging and releasing the sear.; Fig. 28, an end View of the bolt-operating slide; Fig. 29, a side view of the samg; Fig. 30, a plan view of the pawl for coperating with the breech-bolt slide to lock and unlock it; Fig. 31, a view of the same in end elevation; Fig. 32, a view of the same in side elevation; Fig. 33, aperspective view of the spring-cam device engaging a firing-pinsear, enlarged over the representation thereof in Figs. 26 and 27; Fig. 34, a section taken 'at the line 34 on Fig. 35 and viewed in the direction ofthe arrow; Fig. 35, a section taken at the line 35 on-Fig. 34 and viewed in the direction of the arrow; Fig. 36, a View showing in elevation the trigger the trigger-aetuatedi ri iig-pin soar, and the interposed cam-lever; Fig. 37,- a perspective view of the trigger-actuated firing-pin sear; Fig. 38, a section taken at the line 3S on Fig. 2 and viewed in the direction of the arrow; Fig. 39, va section taken at the line 39 ou Fig. l and viewed in the direction f the arrow; Fig. 40, a section taken at the ine 40 on Fig. 1 and viewed in the direction of the arrow; Fig. 4l,-

a plan View of the cartridge-feed device; Fig.

. 42,-aplan -view of the. magazine cut-olf; Fig.

43, a perspective view of the engaging pawl for the carrier cam-slide; Fig. 44, a broken perspective view of the side wall of the frame, showing the guide-slot in which the pawl shown in Fig. 43 slides and the countersunk part 'of the frame to permit the movement of the engaging rear end of the carrier-actuat-` ing cam-slide; Fig. 45, a broken view in sectional side elevation of lhemagazine, showing its sliding door'and contained spring-controlled cartridge-lifter; Fig. 46, an enlarged end view of the receiver provided with in y improved. disappearing sight inra partiallyelevated position; Fig. 47, a similar view of the same with the sight lowered to its shield-v ed'posilion; and Fig. 48 a Vertical section. -'taken"at the line 4S on Fig. 35 and viewed in n the direction of thearrow, showing the telative positions of the bolt-slide a'nd starter-lever to the gunbarrel. I

A is the stock, B the barrel, and-C the receiver 'into the forward thickened or reinforced eud of which the barrel is'screwed and which is fastened to the stock. The receiver is a thin metal shell of tubular and preferably general cylindrical shape and having comparatively little of its substance cut away to avoid weakening it, the only openings thus provided being that shown at r, extending partially along its upper side, through which to discharge the extracted shells of spent cartridges and to feed loaded cartridges singly, and' ihe longitudinal opening r'A in its base, through which to admit the connections between the mechanism in the receiver and that outside the receiver. At its rear end the receiver C is closed, as by a screw-plugq, containing in its outer face a vertical recess of sufcient depth to embrace and shield a vthreaded stem o', terminating at its upper end in a sight o andpassing through a pair of guide-lugs o3 on the outer face of the plug, between which is con fined a uut o, encircling the stem to engage the thread thereon, the stem coinciding at its lower end with a socket 04, Fig. 1, in the stock. By turning the nut o2 in either direction the sight may be raised or lowered to any desired height with extreme nicety, owing to the screw form of the adjustment employed, and when it is desired to cause the disappearance of the sight it may be lowered below the top of the receiver in the socket o4 by properly turning the nut 02,

in which position it is embraced by and shielded from harm in the plug-recess.

In the opposite inner sides of depending ange portions C of the receiverCare provid ed a lower pair of straight longitudinal guides (shown as grooves p p) and an upper pair of similar guides prp', each of the latter formed in .two longitudinal .sections on different planes connected by a diagonal 'cam part at p2, and in the opposite inner sides of the walls of the receiver proper are provided the' longitudinal extractor-guides p3 p3, deflected at their rear extremities to a straight rear extension in an upward`direction, as show n at p, or in a downward direction foa purpose hereinafter described, these guides also converging toward their rear ends by there decreasing their depth. v

D is the frame containing the trigger-guard fastened at one end to thereceiver near its forward end at t, Fig. 3, and toward its opposite end to the under side of the stock A by the same screw which secures the receiver atits tailpiece t to the stock. Centrally along the forward portion of the trigger-guard frame` extends the upward-projecting rib v, the rear portion of which is cut out at fu', as most clearly shown inFig. 5, to enage a carrierwedge. In the trigger-guard frame, behind L the trigger D', are provided and formed, preferabiy integral therewith, the sides and the izq \back s of the magazine E, the sides containing near their lower-edges the Vguides T5 p5, shouldered, as shown atp, at their rear ends and which support the longitudinally-sliding IOO azine by pins t3 and extending laterally into the guides from near the opposite ends of the door, Fig. 3. On the door E' is carried my improved cartridge-lifter,'(see particularly Fig.

cover or door E- for the open base'of the mag-f` 13o V 45,) comprising a longer lever m and a shorter 'lever m', both fulcrumed at their lower ends to its upper extremity a shelf m3, extendingi forward toward its free end across the lever m'. Where the actuating-spring engages the levers, they are provided with surfaces which have dierent directions of inclination with respect to the common pivotal support. Thus thetwo arms of the lifter being of dierent lengths and being operated upon by a single spring, the long lever, owing to the relative inclination of its spring-engaged surface, is" given a slower movement than the short one, thus adjusting the cartridge-shelf to the .required position of the cartridges in elevating them.

vTo load the magazine, theweapon should be turned to bring laterally or uppermost the door E', which (after sliding back the operating-handle F, hereinafter described) may be with-drawn in abackward direction, thereby withdrawing also the cartridge-lifter A(then depressed, as hereinafter described) till the forward pin t2' strikes the shoulders at p, (which serveA to lock the'door in its forward or closed position at the pin t4.) Thereupon cartridges G to the capacity of the magazine (shown/as adapted to contain five) maybe introduced into it to rest one lengthwise against the other, the first introduced lodging against the converging top E2 of the magazine, open along its upper side and at the opposite ends. lThe back s has an extension s' at its free end, show as a spring (though it need not be) to engage at its extremity and afford a bearing to the flange end of the cartridge in contact with it. When the magazine lhas been thus charged, the door'E is closed, thereby bringing the shelf m8 on the springpressedlevers then folded, as shown -in Fig. 3, against the last-inserted cartridge,

so that as one `@artridge is fed, as hereinafter described, from the magazine into the barrel the next succeeding one is raised into its position by the 'action of the spring m2. I illustrate also an indicator to show the number of cartridges in the magazine, the same comp'rising an index-finger fr, Fig. l, on the pin t2, pointing tofa register zr', formed on a side of the magazine in an arcdescribed by the finger as the lever m' rises, the arrangement of the register being such that its numbers are spaced apart .to correspond with the length' of arc described by the end of the finger each time a cartridge is taken out of the magazine. The clinger-a: also affords a handle by which to depress the cartridge-lifter t to permit it to be withdrawnwith the door E' preparatory to loading the magazine.

The operating-handle F may be of any desired form, but is shownL as a grip conform- `ing to the shapeof the hand when grasping it, and is guided in ,its reciprocating moveinside the receiver as a thin metal shell, ex-4 cept as to its forward portion, where it is thickened and provided with opposite external lugs Z and Z to engage in the manner hereinafter described with companion lugs Z2, opposite each other on the inner wall of the receiver() behind the forward limit of longitudinal play ofthe lugs on the bolt.

' These lugs have cooperating cam-faces to seat the cartridge-and eect firm locking of the bolt. In its under side the bolt contains a cam-slot 1c, Fig. 15, having its opposite end portions extended in a straight direction or parallel with the length of the bolt, and the bolt carries the firing-pin sears i and h. To- 'ward its rear end the bolthas acircumferential annular recessj, and it is reduced in diameter toward its forward end and contains the firing-pin H', which is hollow throughout the greater portion of its length and shorter than slide preferably of the general'saddleshape illustrated, with laterally-projecting ribs px, which sustain the slide in the guides p, a cut-away rear section' affording a seat I', Fig. 29, and a stud la' extending from its top .to engage the cam-slot la in the base of the breech-bolt.

l2 is the pawlyshaped substantially like the slide in cross-section and provided with forward-projecting arms w, at the ends of which it ispivoted at w' to the sides 'of the slide near its forward end,Y thesffslide being em- ICO IIO

braced by the arms, sov as to locate the trans- -verse portion of the pawl over the seat l', with through slots f2 in the handle, into the path A K2, which should conform inside to the shape of a cartridge, the sides of the holder K2 terminating at their rear extremities in downs wardly-curved extensions-d', between .which is pivotally supported a wedge-shaped cam d, performing a function hereinafter described.

Ks is the carrier-actuating cam-bar, shown most clearlydn Figs. 13 and 14 as comprising -a bar having at one extremity a depending slotted head u and a bifurcated head K at its opposite extremity, in the sides of which fare the straight. guide-slots u', embracing a limiting-pin u? on the trigger-guard, and in" the extremities of which are companion diagonal cam-slots K14, straight or extending lengthwise vof. the sides for a short distance at their upper ends and shouldered to' hold the carrier inits lifted position and affording a carrier-lifting cam. The bifurcated head K'. .'straddles the web v on the trigger-guard 'frame and projects upward through longitudinal slots 3 and 4` in thebar K', with which the cam-bar is connected through the cams'lot K4 in its 'head by a pin 5. The bar K3 is confined andguided in its movements in a .channel 6, provided for it in 'a side of the frame of -the weapon.

L isa spring-pawl, (see Fig. 43,) fastened at one end to the operating-handle to engage the slotted head u on the rear endrof the carrier-lifting cam-bar, this spring-pawlhaving adepending inward-extending V-shaped nose i or cam 7 to encounter a rigid companion cam 77 in its path in the trigger-guard frame,'(see Figs. 2 and 44,) and thereby force the dog lat- .erally out of the slot ,in the -head u in the forward movement of thebperating-handle, as d for a .purpose hereinafter described.-

al*M (see particularly'Fig. 39) is the feed device for yengaging at its rear end the uppermost cartridge in the magaz e b the for' ward movement of th'e. opera rig-handle' F,

shoving the cartridge out of the 'magazine' into the holder K* of the carrier K. 3 The feed device is shown in the vform of a .cross-bar conne'd at its ends to slide in the rear pori,

-tions of theguides p', behind the pawl 1 of the.breechbolt slide, and having va spring pressed stud c, whichenters agroove .c' in 4the base of the breech-bolt, which groove perf.

mits the rotary locking and .unlocking actions of the bolt, the stud extending do'wnwardinto4 the -maglzine through the slot in the top E. When t e breech-bolt approaches its rear position, the .-feed device .encounters the magazine cut-clito release the 'feed device from of action, thereby converting the weapon into a single-loader.. This is done through the medium of ablock c4, having a cam-recess cs in its face and two notches 8 and 9, one above the other, .in itsV back to be engaged by a spring-pressed pin c,protruding from its bearing in the rear end of the receiver into. the latter,A and an operating thumb-stem c2 projects from the cutoi block c4 backward through an opening c7 behind the receiver. When it is desired to utilize the magazinefeed of the weapon, the block c is raised by its stem cauntil the pin c6 snaps into the lower notch 9, whereby the block is held in its raised position, wherein the cam-recess c5 is above the path of a pin o8, projecting laterally from the depending stud of the feed device, which accordingly permits-the engagement of the 'stud c with -the bolt. When, however, it is desired to usefthe weapon as a single-loader, .the block c4 is depressedv until its .holding-pin c6 snaps into the upper notc'h 8, invwhich position the cam-recess c5. is in the path of the pin cs, 'which accordingly enters it when the feed device is retracted and withdraws the stud c from engagement with the bolt.

suitable variety extending along opposite sides of( the reduced forward portion of thb breech-bolt, shown to be provided with acircumferentialrecess b, (see Fig-15,) highest about its center, and in which is loosely confined` the divided collar b", carrying as part of it to extend across its perimeter at oppof site pointsof its circumference the extractors N, from the rear ends of which there project laterally outward the studs b2 into engagement with the extractor-.guides p3. Immediately behind the recess b in the reduced for- 'ward end of the bolt itois provided witha circumferential recess a, extending only part .i for locking the tiring-pin H' when itsspring is compressed is pivoted to th/e\breechblock .H andv projects laterally outward at its forwa'd end. into the path of a spring-finger i', fastened at. one endv to the slide I toextend lengthwise across it and terminat'ng'at its opposite end in a head '133, having a ateralcam- N N are the extractors ofthe usual or anyway about the bolt -to aiord the abutments rio face and an upper cam-face i, the former adapting' it to slide past the` sear without in thel forward .movement of the.

slide I and the cam-face 'i5 opel-ating to trip) that sear in the rearward'moveinent of the the bolt, and thus take the. magazine-feed out slide, as and for arpurpose hereinafter Ldescribed. i

The trigger firing-pin sear h, which is pivoted to the breech-block and spring-pressed like the Sear i, (see Fig. 34,) is cam-faced at its forward end, as shownat h', to adapt it to be there engaged by a companion cam-face h2 on the adjacent end of a substantially Z- shaped trigger-lever h71.3, fnlcrumed at y at one of its angles, adjacent to which it is engaged by the n'ger extension h4 of thetrigger D', and with which the latter is connected by a pin h5. Obviously when the trigger is pressed the lever h3 trips the sear 7L, and when the trigger is locked in its pressed condition, as it may be by means provided for the purpose, (shown asa button 10, working through thev` trigger-encircling ring D2 to press and lock an arc-shaped stop 12 against the trigger,) the lever h5 remains in the path of the sear h to trip the latter whenever it encounters the lever, leaving the sear z'alone to control the firing-pin. f-

A desirable (but not the only) construction of safety mechanism for preventing the bolt from being unlockedto enable it to be retracted by the operating-handle until the explosion of the cartridge has occured is best shown in Fig. 2l. As shown, it involves a chamber O in the bottom of the forward end of the receiver C, carrying a locking-head O' on the end of a rod O2, passing throngh'a protecting-tube O3, screwed at one endi'nto the forward end of the receiver and extending thence underneath the barrel B into a cylindei-O, fastened to the barrel, with. the bore of which it communicates through a port z, the cylinder being also provided wilh a port e', leading to the outerv air and located out of alinement with the port z, but short of the limit ofthe outer stroke of a spring-controlled piston O5 in the cylinder, with which the rod O2 is connected. The lock is shownin Fig, 24 at O. In its normal position (shown n Fig; 21) it engages the bolt at one of its locking-lugs, so that the bolt4 cannot be turned in the direction to unlock it until the lock O' has been withdrawn from the path of tlie lug, since the latter is then underneath the head. When` however,a cartridge has been exploded in the barrel, the gas evolvedv by the explosion from the powder enters through the port z the cylinder O4 under sufncient pressure to force forward the piston O5 past the port z', th rough which the gas then escapes, and this movement of the piston withdraws the head O' out of the path of the lug on the bolt, permitting the latter to be turned to unlock it.. Unless means were provided to the contrary im mediately after the escape ofthe gas from the cylinder the piston under the recoil of lits controlling-spring would be forced back in the cylinder, thereby correspondingly' forcing back the lo'ck O', whereby had. the bolt not yet been turned to unlock it the lock would rengage the lug on the`bolt and prevent the latter from beingr so turned. To obviate this, there is provided in'thechamber O a springcontrolled stop O, having a recess 13 in its rear side to receive a rigid pin 14,*which projects into it .to limit the vertical play of the stop, which when the lock O' has been driven ahead rises into its path and obstructs its return. .The stop has an upward-projecting finger 15, cam-faced at its end where it rises into the path of the lug on the bolt, which when the bolt is turnedy to lock it depresses the stop out of the path of, the lock O and permits the return of the lock into'engagement with the bolt. To enable the lock O to be withdrawn by hand, as in the case of fail-` ure of a cartridge to fire, thereA may be provided to extend from the rod O2, through a longitudinal slot in the tube O3, a button 17, or the like, by manipulating which the rod may be moved accordingly. The essential feature of this safely mechanism is a lock actuated by the discharge to release'the bolt, .and this irrespective of any particular means for accomplishing such release.

It is a mat-ter of importance to avoid overheating of the barrel by the explosion of thel cartridges. o accomplish this purpose, simple means are herein shown, involving the roughening of the outer surface of the barrel throughout a portion of its length from the receiverV forward, (a construction notshown in the drawings by reason oflthe smallness of thescale on which the views are presented,)

whereby innumerable heat-radiating points are afforded, and ceiling about the roughened surface a wire 18 with the coils spaced apart to avoid obstructing the heat radiation and afford to the hand of .the user of the weapon a practically non-conducting protection against contact with the hot roughened surface of the barrel.

Means are provided for facilitating the eX- traction of the' shell by employing a direct cam-action of the operating-handle to start the shell with increased power. The means referred to are shown in Fig. 48 as comprising a 'spring-controlled shell-starter 1),.pivoted in the lframe of the receiver near the rear end of the barrel, having a short arm P' engaging the flange of the cartridge and a long arm P2 ext ndinglinto the path of the slide I, iwhich encounters a V-shaped cam P3 on the arm P2 to swing it on its pivot and start the shell when the bolt-slide passes through the rear straight part of the bolt-actuating, cam k.

The operation of the several mechanisms hereinbefore described is as follows: As the parts are shown assembled in Fig. 1 the breech-bolt-is in its retracted position and has presented in its return-'path by the 'carrier a cartridge ready to `be introduced into the'barrel. By then moving forward the operating -handle F the following; described functions are performed: The spring-pressed levers f3 are moved forward on their tracks p8 against the pin f', which connects the arms j', thereby advancing the bolt H-until the rear ends of the levers j"3 encounter the cams IIO pfin their path.- ln this movement of the bolt the studs b2 of the extractors N are brought into the deeper parts of their guides' p, permitting the spring-collar a3 to actuate the rear ends of the extractors to swing them out, and thereby canse the forward ends to swing inward and grip the cartridge, and this movement of the bolt further carries the extractor-studs b2 from the extensions p* of the guides Vp into the latter, thus bringing them into their straight path of movement. Moreover, as a 'further function of 'this advance movement of the bolt the cam-wedge dis encountered by it and forced between the sides ot' the carrier-holder K2 to spread them apart and force the shoulders d5 on the cam-wedge past companion shoulders d'i on the extensions d' to hold the wedge in position to keep open the carrier-holder until the carrier descends to its lower position, where it encounters the rib 'u to swing it on its axis and allow the carrier to close'. When the rear .ends of the levers f3 encounter the cams p9, theirforward ends are depressed out of engagement `with the pin f', thereby maintaining the bolt at a standstill until the pin f' I encounters therearendsoftheslotsfz. Meanou the pin 5.

time this movement of the handle has advanced the carrier-actuating cam-bar K3,

owing to the engagementtherewith at its' slot'- pawl I? in its guides p' until the lugs at the forward end ol?v the bolt have passed beyond the companion lugs in theforward end of the receiver, when Vthe pawl I2 will ha\'e passed .through the cam-sections p2 of the guides p' and have been depressed to withdraw the projection j' out of the recess j, thereby releasing the bolt from the pawl. Thereafter the continued advance of the sldeI causes.

under side of the bolt and actnate the bolt tov rotate to its locked position, bringing -the lugs on the boltinto line with and in front of the companion lugs on the stockwall and causing the cam-faces of these lugs to firmly seat the 'cartridge in the chamberof the barrel and lock the bolt. T he further advance of the slide I causes the pin k to advance through the straight part at the forward end ot the cam-groove k until the cam-face s of the spring-pawl i' has encountered the Sear 1l and passed beyond itsuiiciently to allow the paw! 'i' to swing into the path of that sear and bring the cam-face '5 in front of the forward end lof the said scar. During this movement thetrigger-sear h has been advanced into the path of the trigger-lever h3 above the camface h2. This movement having brought the lug l into its fully-locked position, the loci/z O. is actuated by the spring of the piston Q5 bolt and retain its engagement until, bythe discharge of the weapon, a portion of th'e gas is permitted to escape into thecylinder O4 and drive the Vpiston forward, thus carrying the lock O outof engagement with the lug Z and permitting the spring-stop O6 to rise into the path of the lock and retain it out of action until by the initial part of the rotating movement of the bolt in locking it the lug l' comes into contact with the cam-face 20 on the stop the path of the lock O' and permitting the latter to return to rengage with the lug by the reverse movement of the parts. The operating-handle being now in its forward poaction is produced as follows: The initial part of the rearward movement of Athe'handle brings the slide I into engagement with the pawl '"g' and causes a rearward movement'of the firing-pin to cock the s pring H2. This movement also hrngs thecam-face ou the under side of the pawl g into engagement with the companion cam-face at the rear end of the slot g' in the bolt, whichactuates Vthe pawl to rise out of engagement with the pawl I2 and permits the tiring-pin tovengage lwith the 'sears 1I and h. AThis movement of 'the cam-groove k and rotate the bolt to itslunlocked position. The further rearward movethe pawl I2 to pass through the cam-sections p2 of their guides p', thus causing the projeclar recess j in the bolt. 'ward movement of the parts causes the extensions p4 of the guides p3, and thereby actuate the spring-ring a? to unlock the extractors, and inthe, rear straight converging parts of the cam extensions pthe rear' ends of the extractor-s are caused to swing-9u their hinges and the forward ends of the extractora to release the flange of the cartridge. At this time the movement of Athe handle has carried the spring-paw] L back into its cam-'slot 78, which c permits it to engage with the slotted head u of the carrier-cam bar K3. The further rearward movement ofthe handle carries the levers fs into engagement with the cams p9 and actuates them to release the pin f",'when the continued rearward movement'of the handle actuates the pin f' to traverse the slotf?, and the spring-pawl L actuates the carrier-cam bar K3 to cause the pin 5 to traverse the camslot K4 and lift the carrier into position in front of the bore of the barrel.

Thering action is as follows: The tiringspring lbeing cockedand the `firing-pin being 'in engagement with the sears h and 'Las shown 06, causing the stop to be depressed out ofv sition, as represented in Fig. 2, the loading' to retreat into locked engagement with the the slide I causes the projection k' to traverse meut of the parts causes the cam-studsp11 of ro5 tion j' to rise into engagement with the annu- 'lhe continued back-l tractor-studs b2 to pass into the rear cam exhandle.

in Fig. 15, the initialipart of the rearward movement of the operating-handle brings the cam-face 'i5 of the spring-pawl z" into engagement with the Sear and the further movement of the slide I tri-ps the scar The trigger-tiring action is as follows: The sear h is carried by the initial part of therearward movement of the bolt into the path of the vertical movement ofthe cam-lever h3,and this lever is actuated by pressure on the trig ger to rise and release the sear, thus accomplishing the trigger-firing of the weapon. l` i,

The automatic discharge of the weapon is accomplished by retracting the trigger and moving the lock 12 by means of the button l0 into engagement with [the trigger to retain'- it out of action and moving the cam end of the lever h3 into the path of the trigger-scar h to cause this sear to be engaged by it, and release the firing-pin by the movement of the The locking action of the extractors is accomplished as follows: rf'he unlocked posi-- tion of the extractors is shown in Fig. 16, the lugs on the bolt being then in the unlocked vertical position, and when the bolt is actuated to rotate to its locked position the springcollar a3 encounters the shoulder a2, and the further rotary movement of the bolt carries the lugs a4 into locked engagement with the extractors, the rotating ofthe extraetors being prevented at this time by the engagement of the studs b2'with the guides p3. In the reverse or unlocking movement of the bolt the annular groove a permits the springcollar as to remain in locked engagement at its lugs of* with the extractors until the bolt has been fully unlocked and partially Withdrawn, when the studs b? in passing' through the cam parts p5( of the guides psause the extractors tok rotate, and the shoulder a' prevents the spring-collar a3 from rotating, thus carrying the extractors out of engagement with the lugs a4. The further and final movement of the extractors bring the studs b2 into engagement with the parts 4, when the di'- minished depth of the latter causes the extractors to release the cartridge.

The shell-starter P, which is auxiliary in its action, is engaged .by the initial part of the rearward movement ofV the pawl :12, and

it is depressed by means of its cam-face Pi",`

causing it to swing on its pivot and the short arm to start the cartridge by engagement with the ange thereof. The movement of the slide I, which permits the entire force of the hand to b e exertedon this lever P2, is permitted by the straight part at the rear end of the bolt-locking cam-groove lo. The

cartridges are elevated in the process of loading by the action ot the cartridge-follower and its levers m and m'. These levers maintain the required position of the cartridge'- shelf ms by the action of the spring 'm2, which engages the levers mand fm' in the manner described.

While I show and describe in'this applicafv tion centrally hinged shell extractors Y at;

tached to a breech-bolt, I do not' make claim therefor herein, the same being claimed in a concu rrently-pending application, Serial No. Y

667,361, filed January 20, 1898.

What I claim as new, and desire to secure gage the cartridge, and means for actuatingi, the extractors to release the cartridge, suib,4 stantially as described.

2. -In a firearm, the combination of the re ,ciprocating and rotating breech-bolt, shellf extractors .having collar-sections at which they are hinged together about said bolt, and a spring-collar device on the bolt for engaging the entractors to actuate them to grip a cartridge, substantially as described. l

3. In a firearm', the combinationof the reciprocating and rotating breech-bolt, shellextractors on the bolt and a spring-collar in a seat about the Ibolt,.provided with lugs and engaged by said bolt, in its rotary locking movement, to force said lugs into locked' engagement withthe extractors, substantially as described.

4. In a iirearm, the combination of the reciprocating and rotating breech-bolt, shellextractorshaving collar-sections at whichV they are hinged together about said bolt, and a spring-collar in a seat about the boltpro vided with .lugsand engaged by said bolt, in

its rotary locking movement, to force said lugs 4 into locked engagementwith the extractors, substantially as described..

5. In a firearm, the combination of the re-v ciprocating and rotating breech-bolt, shellextractors having collar-sections -at whichv they are hinged together about said bolt, a spring-collar in a seat about the bolt, provided with lugs andengaged by said bolt, in

its rotary locking movement, to force said lugs into locked engagement with the extractors,

- and' a receiver having cam-guides in its side fwalls engaging said extractors to unlock them,

substantially as describedfxx IOO IOS

IIO

6. In larearm, the combination of a. recip- ,y rocating and rotating breech-bolt, shell-extractors having collar-sections at which they are hinged together about said bolt, a springcollar in a seat about the bolt, provided with extractor-'locking lugs, and a receiver having in its side walls cam-guides for said extractors diminishing in depth toward one end to control the gripping and releasing action of the extractora on a cartridge, substantially as described.

7. In a firearm, thecombination of a reciprocating, and rotating breech-bolt, shell-ex- -tractors having collar-sections at which they are hinged together about said bolt, a springcollarin a seat about the bolt, provided with extractor-locking lugs, and a receiver having in its side walls cam-guides for said .extractors diminishing in depth and varying i-n direction toward their rear ends, substantially medium between said bolt and handle carrying a pawl, shell-extractors having collar-sections at which they are hinged together about said bolt, a spring-collar in a seat about the bolt, provided with lugsand engaged by said bolt, in its rotary locking movement, to force said lugs into locked engagementwith the extractors, and a receiver having cam-guides engaging said pawl and cam-guides for said extractora diminishing in depth and varying in direction toward their rear ends, substantially as described.

9. In a firearm, the combination of an actuating-handle, a reciprocating breech-bolt, a spring-actuated ring-pin in the bolt, a sear engaging the firing-pin, and a connecting medium between said bolt and/handle carrying a pawl, a receiver having guide-grooves ,engaging the pawl and governing its engagement with the bolt, and the said connecting medin n1 engaging the firing-pin to cock the spring a connecting medium between said bolt and and the sear to release it, substantially as described.

10. Ina firearm, the combination of an ac-A mating-handle,l a reciprocating breech-bolt,

a spring-actuated tiring-pin in the bolt, a connecting medium between said bolt and handle, and a spring-actuated pawl g carriedk by the firing-pin and projecting into the path of said connecting medium to be actuated by it to cock the firing-pin spring, substantially as described.

11. In af'irearm, the combination of an actuatinghandle,-a reciprocating breech-bolt,

handle, a spring-actuated firing-pin in the bolt, a connecting medium between said boltL and handle carrying a cam-faced spring-pawl, a spring-actuated pawl g carried by` .the iring-pin and projecting in'to the path of said connecting medium to be actuated by it to cock the firing-pin spring, and a searv for the firing-pin having a cam-face for engagement with said cam-faced 'spring-pawl to release said sear, substantially as described.

12. In a firearm, the combination'of an actuating-handle, a reciprocating breech-bolt, a connecting medium between said bolt and handle,a spring-actuated fi ring-pin in the bolt, a connecting medium-between said bolt and handle carrying a cam-faced spring-pawl, a spring-actuated paw] carried by the firing-pin and projecting into the path of said connecting medium to be actuated by it to cock the firing-pin spring, a trigger-Sear h and ajsear i for the firing-pin, a trigger for releasing said sear h and a cam-face on said sear i forengagement with said cam-faced spring-pawl to release said sear t', substantially as described.

13. In a rearm, the combination of an acmating-handle, a reciprocating breech-bolt,

a connecting medium between said bolt and handle, a spring-actuated firing-pin in the bolt, a sear 'i carried by the bolt to engage the firing-pin and having a cam-faced forward end, and a spring-pawlz" on said connecting medium having the cam-faces z" and i5 on its -head end, and permitting the weapon to be discharged bythe rearward movementof said handle, substantially as described.

14. In a firearm, the combination of an actuating-handle, a reciprocating breech-bolt, a spring-actuated firing-pin carried by the bolt, a connecting medium between said bolt and handle carrying a pawl, a receiver ,having guide-grooves engaging the pawl and gov- .erning the engagement with the bolt, and theA said connecting medium engaging the firingpinto cock its spring, a sear for the firingpin, a trigger for controlling said sear, and a locking device for retaining said trigger out of action, substantially as described;

15. In a firearm, the combination of -an actuating-handle, a reciprocating and rotating breech-bolt, a spring-actuated tiring-pin carried by the bolt, a connecting medium be-`l tween said bolt and handle, means for compressing the firing-pin spring, a firing-pin scar on the bolt having a cam-faced forward end, a triggerand a connection between said trigger and sear having a cam-face, substantially as and for the purpose set forth. A

16. In 4a firearm, the combination of an actuating-handle, a reciprocating `breech-bolt operated by the handle, a magazine, cartridge-carrier supported to vibrate between said magazine and the barrel, and a reciprocatingvbar actuated from said handle and having a cam-slot near its forward end at which it engages said carrier to operate it, substantially as described.

17. In a firearm, the combination of an ac' tnati11g-handle, a reciprocating breech-bolt operated by the handle, a magazine, a cartridge-carrier supported to vibrate between said magazine and the barrel, a spring-pawl carried by said' handle and having a camface', a companion cam-face in the stockframe in the path of the cam-face on said pawl, and a reciprocating bar releasablyengaged near one end by said spring-pawl and having a diagonal cam-slot at its forward end IIC at-which it engages said carrier to actuate it,

substantially as described.

18. In a firearm, a cartridge-carrier having a bifnrcated spring cartridge-holder and a cam-wedge pivoted between the sides of said holder, substantially as set forth.

' 19. In a rearm, the combination of an ac-V tuating-handle, a reciprocating breech-bolt operated by the handle, a magazine, a cars tridge-carrier movable between said magazine and the barrel and havinga bifurcated spring cartridge-holder and a cam-wedge pivoted between the sides of said holder, and means in the path of movement of said carrier to release said cam-wedge, substantially as set forth.

20.' In a firearm, the combination with a reci procating breech bolt and its actuatinghandle, of a cartridge-magazine containing a spring-actuated cartridge-lifter, a cartridgecarrier movable between said magazine and the barrel, a reciprocating cartridge-feed device, and a magazine cut-E engageable by said feed device to arrest its action, substantially as described.

21. In a firearm, the combination with a reciprocating breech-bolt, its actuating-handle and the connecting medium between them, of a cartridge-magazine containing a springactuated cartridge-lifter, a cartridge-carrier movable between said magazine and the barrel, a reciprocating cartridge-feed device having a spring-stud normally engaging said connecting medium, and a magazine cu t-off having a. cam-face c and adjustable into the path of said spring-stud to engage it and withdraw it from engagement with said connecting medium, substantially as described.

22. In a firearm, the combination with a re-I ciprocating breech-bolt, its actuating-handle and the connecting medium between them, of a cartridge-magazine containing a springactuated cartridge-lifter, a cartridge-carrier movable between said magazine and the bar.-

rel, a reciprocating cartridge-feed device having a spring-stud normally engaging said connecting medium, and a magazine cut-off adjustable into and out of the path of said stud and comprising a block T64 having notches 8 and 9 engageable by a spring-stud c6, a cam- A ing through an opening c7 notch c5 and an operating-handle c2 protrudin the rear end of the receiver, substantially as described.

23. In a firearm, the combination of an actuating-handle, a'reciprocating breech-bolt having a cam-groove k, a connecting medium between said handle and bolt engaging said groove, a `pawl carried by said connecting medium and engaging with the bolt, a receiver having in its side walls cam-guides for said pawl, and a shell-starter. pivotally supported in the receiver to engage the ange of a cartridge and having a cam-face at its rear end extending into the path of said connecting medium to be engaged thereby to start the shell, substantially as described.

24. In a breech-loading firearm', the combination` with the reciprocating and rotating breech-bolt and its locking means, of a tube Os extending along the barrel B and containing a reciprocating stem 02 provided at one end with a lock to engage a lug o n the bolt in a chamber O in the receiver and carrying at4 its opposite end a piston O5, a cylinder O4 in which said piston is'conned against a spring and communicating with said barrel through a port z andkwith the outer air through a port z', and a spring-controlled stop O6 in said chamber, substantially as described.

SAMUEL vN. MCCLEAN.

In presence of- Y SYLVESTER BARBOUR,

HAROLD-F. C. FLINT.

US723706A 1896-05-28 1896-05-28 Magazine bolt-gun. Expired - Lifetime US723706A (en)

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