US2308283A - Repeating firearm - Google Patents

Description

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F. L. HUMESTON REPEATING FIREARM Filed Sept. 22, 1941 4 Sheets-Sheet 3 v 'IJON REPEATING FIREARM Filed Sept. 22, 1941 s E M U H L F.

4L sheets-sheet 4 mtiiiim MG: i

erich l1.. it New ven, wenn., ns-

'to Western @D indue om New woven, no, u ooorntion ot me mmwmm @mimi 22 i s no. tiene iv ci The present invention relates to improvements in repentinos nii-cosine, und more particularly reiutee to improvements in repeutine nreetrms oi the tvpe employing n reciprocutine notion-slide ior uctustinw e. movoble breech-holt.

@ne ot the objects ci the present invention is to provide e, superior repeutine dreolrm construction which is dure'ole und relisbie in operation und which niet he produced ut u low cost tor v .it iurther object oi the present invention is to l provide o superior repen nre construction euiirodvinw e. reciprocdt notion-slide sind e ensopernted soste tor nctuo. the seid notionslide, d wherein the Suid notion-slide is edectiveiv uuided without erp notion und with ireedoni i'or heine conveniently reieesed from .such unis notion ier heine e o irom the nrenrm structure.

With the nuove ond other objects in view, es vviii oppeor to those t in the uri. trom the present disclosure. i invention includes sil tentures in the seid losure which ore novel over the prior ort end which nre not claimed in unv sentirete uppiieuti.

in the dcconipeu drds, in which certuin modes oi cerrrvi` et out the present invention ure shown ior illustrative purposes:

idw. i is u view in side elevution oi' n rioperoted repente; dreerin embodying the prent invtion;

Fie., d is d lernten view oi the centrui portion oi the nreurm shown portie in side elevotion es purtiv in verticoi centrotioneitudinoi section with the perte in the positions which they i 'o when the timer is cocked end the breech-holt u in its ioreecii-ciosinu position prepsrotorv to tite disehoiwe oi the nre;

siide is moved reerdisr to suostttntieilv the l di it oi' its reorword movement;

(UL tip-16) Fig. 5 is e. transverse sectional view teiten on the line of Fig. 2;

Fie'. 6 is o similar view taken on the line oi Fie. 2;

Fie; 7 is o. broken transverse sectional view taken on the line 1 1 oi Fig. 2;

Fis. 8 is e. view in rear end elevation oi the breech-bolt;

Fife. 9 is a, top or pian view thereof;

Fig. i0 is o view in side elevation oi the receiver, together with a portion oi the barrel;

Fig. 11 is a. broken view in side elevdtlon ci the rear portion oi the barrel and viewing the same from the side opposite to that viewed in Fig. 10;

Fig. 12 is an underside view thereoi;

Fig. 13 is e broken sectional perspective view oi the barrel taken on the line Ii-ii oi Fie. 1i;

Fig. 1i is a perspective view of the action-v slide;

Fig. 15 is e view in side elevation oi the receiver, the action-slide end the rear portion oi the barrel, showing the said action-slide longitudinelly shifted into position ior being dismounted from the receiver and barrel;

Fie. 16 is o transverse sectional view teiten on 4the line it-ii of Fig. 15;

Fit. 17 is e similar view but taken on the line [I1- ill oi Fig. 15;

Fig. 18 is n View similar to Fig. 15 but showing the rear end oi the action-slide lifted upwardly lto free its retaining-lip from the retaining-chenspondine to Fig. 16, but showing the action-slide as being swung laterally with respect to the loerrel d receiver;

' Fig. 2i is e. transverse sectional view oi the nnture oi Fig. 6, but showing s modied io oi me i'or guiding the longitudinal movement oi the notion-slide;

22 is u broken perspective view ci the ier wurd portion of the action-slide ci the structure oi 21; and

Fie. 23 is n broken perspective view oi the ne.-

oi 13 ond showing the rmi' portion oi the borrel oi the structure oi Figs. 2i end 22.

i rticuler repeating ilreerm herein chosen tor the purpose oi' illustrating the present invention ie oi the ees-opereted type end the iorm oi the invention shown in Fles. 1 to 20 inclusive in action-slide may now be tilted around its' right guide-rib 43 as a fulcrum fron\the pisition in which it is shown in Fig. 16 into the position in which it is shown in Fig. '20. In this manner, the action-slide Ml may be completely removed from the remainder of the structure of the rearm by continuing the swinging movement reierred to. Reinstallation of the action-slide 40 may be eiected by reversing the procedure just above outlined.

The right side wall d2 of the cross-head 39 of the action-slide 401s formed in its rear face just below the bar dl .with a rearwardly-opening recess or socket 53 receiving the pointed forward end ci a breech-closing plunger E6. The said plunger is adapted to reciprocate in a cylindrically-contoured longitudinal pocket 55 opening forwardly through the front end of the receiver 2B and located in the right sideof the receiver 2E mainly in the ledge 48 thereof. The Vpocket 55 just referred to accommodates a helical breech-closing spring 56 which thrusts at its rear end against the closed rear wall of the 'said pookl et. At its forward end the said spring 56 thrusts against the rear end of the breech-closing plunger 54 proper at the point where a relativelyslender integral stem 51 projects rearwardly from the breech-closing plunger 54 into the interior of the spring 56.

The breech-closing spring E6 acting-through the breech-closing plunger 5i exerts a constant but yielding effort to move the action-slide i0 forwardly to the limit of its movement and until its said forward movement is checked by engagement with the piston 3d, as shown in Fig. 2.

Reciprocating in the upper portion of the hollow interior of the receiver' is anbreech-bolt 58 whichV also has oscillatory movement for being locked andV unlocked in a manner generally like the lbreech-bolt employed in the well-known Garand military riiie. 'I'he said breech-bolt is provided with two oppositely-extending lockinglugs 59 and 60 formed integral therewith and lov cated adjacent its forward end. 'as shown particularly well in Fig. 9. These locking- lugs 59 and 60 are engageable with .forwardly-facing locking-abutments Bi-GI '(Fig'. 5) formed in the with an extension 62 which enters a' cam-recess 83 formed in the inner face of the bar 4l of the action-slide 40 just forwardly. oi theoperatinghandle BI thereof. 'I'he cam-recess B3 is shaped so that upon the action-.slide moving rearwardly from the position in which it is shown in'Fig. 2,

thereceiver 2S. l, The trigger mechanismiorv controlling the."

se which is rigidly 3 hammer 65 pivotally mounted in a trigger-plate attached to the rearm structure and extends hammer 65 requires no detailed description herein, but it is to be noted that Athe breech-bol`t 58 is formed upon its rear the firing-pin 6i with a circumferentially-inclined hammer-retiring cam-surface61.(Figs. 8 and 9) which acts to impart to the'hammer 65 a slight initial rearward swinging movement, as will be presently described.

The hammer 65 is formed withastrikingfsurface 68 which engages with the reariac'e ofthe ring-pin Si to` drive the sameforwardly to eiiect the discharge of the rearm. Immediately above the striking-surfacel 68, -thehaFmmer-SB is formed with a nose 69 which `lies in. substantial engagement with the hammer-retiringcam-surface Si of the breech-bolt v58, immediately following the discharged the gream.; Y. 1

Now when the rearm is discharged, the action slide 40 starts 'rearwardly under an lmpulse'imparted to it by gas pressure acting lupon tli'e iirstbeturned piston 34. The breech-bolt 58 will as beforel described, with the eiect of causing thev hammer-retiring cam-surface B1' :of `the breech-bolt 58 to turn about the longitudinal axis of the said breech-bolt. andby engagement with the inclined forward-face of the nose 69 v said hammertobe slightly retired o'ut ot engagement withthe r`. ing-pin 64 to permit the same nto-retirerear-v wardly. After the initialretirement 'of the hanili4 7 of the hammer 55, cause the mer B5 by means of the cam-surface 61' as Just` described, theI straight-line rearward .travel or;`

to swing` the said thebreech-bolt will. continue hammer in a counterclockwise direction?` until it lis'iully cocked preparatory to a further discharge 1 of the rearm.

In the structure illustrated in Figs. 21,' 22 and.

23, a barrel 21a is employedwhich instead of having guide-grooves 44, as in the structure of the preceding gures, is formed on 'each' ofgits respective opposite sides with guide-ribs or ledges -receiver 26. The right-locking-lug 8|! is formed V the breech-bolt 58 will'lbe iirst turned to disenp-. gage its locking-lugs 59 and B from the lockingthe said breech-bolt to re-engage its locking- lugs 59 and 60 with the locking-abutmentsSI-Si of the receiver 26, in a manner well known in the I 1. art.

The breech-boit 5s carries a ming-pm et which normallyprojects rearwardly beyond the rear face. of the said breech-bolt and is adapted to be struck by the upper portion vof a pivotal da and Ma, the left one of which is interrupted to provide a clearance-passage'a. Theupper surface'of each ofthe guide-ribs `Ma'provigles an upwardly-facing Y bearing-surface for pthe guidance of an action-,slidafas will presently ,lap-' pear. A, The `remaining structure of the barrel 21a corresponds to the barrel 21 above described 'and yhas corresponding reference l characters'. marked I addition of the vreference thereon, save with the character a.

The action-slide 40a, designed fcruse` with i i the barrel 27a, corresponds to the action-'slide `il) previously described, save that instead of .be-y ing formed with inwardly-projecting guide-ribs,

the said action-slide 40a. is formed with complemental opposed inwardly-opening- -guidegrooves #3a-43a respectively adapted toritov'er.v

the guide-ribs 'fida-44a ofthe barrell 21a. The

guide-groove 83a extend the full length ofthe. l rear wall 38a, the left-side upwardlyextending portion oi which latter fis. therefore, sulciently narrow to be vertically swung through the'clearance-passage da'of the barrel` 21a.

The other .features of themodmed formar the present invention shown in Figs. 21 to 23'` inclusive correspond generally in respects'fother than those above noted, to the structureel! liigs.

1 to 20 inclusive, and bear sirxnlar reference charboth to the rear and beneath v face immediately above 1 ofthe rst guide-ledge .fof the said barrel, the said action-slide also beingV provided with a. longitudinally-extending second guide-ledge hav- I 'ing nrst guide-ledge having adownwardly-iacing acters, with `the addition ci the reference char# form of the inventionrst shown.

The invention may be carried vout in other specinc ways than those herein set Iorth without departing from the spirit and essentialcha1`A asoeaee .to permit'the iirst guideeledge ofJthesaid acti ester o to each thereof to dierentiate from the fmitl the said action-slidevjto be `tilted;laterally i straining the' said action-slide acteristics of the invention, and the present eminutilmente are, therefore, to be considered inall respects as illustrative "and not restrictive, and all changes coming `within the meaning and equivalency range of the appended claims are intended to be embraced therein. t

' tion: a receiver; a barrel extendingnforwardly,

l1. A firearm structure including in combiuai guide-ledge i having any upwardly-facingffbearin f surface, the said barrelalsobeing?lcrrriedonwitsl opposite side from the said iirstguide-ledge'wi hf a longitudinally#extendingA second guide-1 slide to be swung downwardly through tlie ve 4 cal clearance-passage 'of thesaid barrelto perand releasable retaining-means releasably `"ret against; `lateral tilting movement:'` r l y -i 3. `il firearm structure including in zciiinliina-l from the saidfreceiver and providedfzori'"oneself` its sides with a. longitudinally-extendlngjnrst also having fan upwardly-facingfbearingsurfac the said barrel also being iormedifwitha-vrticali 't clearancepassage leading=downvvai'clly` from th` n upper surface ofthe saidlliirst fsilidel-ledge:

the seid barrel also being formed with a vertical l clearancemassage leading downwardly from tlfie face normally riding upon `the 4bearing-surface ledge of the saidfactioneslide being shorter than the vertical clearance-passage leading downwardfaction-slide movable longitudinally` iwith res to the said receiver andthe jsaid'` bartel1'and1pro vided with a longitudinally-extendinsiilrst de ledge having `a. idownward1v--facing"l1 be 1 face normallyVl ridingj upon the!` bearingf of the ilrst. guide-ledgeof xthe` .saidfbarr ly from the upper surface of the rst guider-ledge of the said barrel to permit the irst guides-ledge through the vertical clearance-passage of the said `barrel to permit thesaid action-slideto Vbe tilted laterally; and releasable retaining-means. releasably restraining the said action-slide against lateral tilting movement.

2. A rearm structure Aincluding in combination: a receiver; abarrel extending forwardly1 from the saidreceiver and provided onl one o1:-

its` sides with a longitudinally-extending rst guide-ledge havingan-upwardly-facing bearingsurface, the saidy barrel also being formed onits opposite 'side `from the said 4rst guide-ledge 40 ci the said action-slide to be swung downwardly.,

`,the said actionf-slideland engaging' p "said action-slide also being provide with v gitudinally-extending*second guide-le 'fe a i' a downvvarally-racingl bearingfsurfac n rm riding` upon *the bearing-surface `:o

guide-ledge of the said barreL,thelfilrst` gui ledge of thes'aid action-slide 'beinggfshorter .th the vertical clearance-passage l leadlrflg` vdo .wardly from the upper surface ofthe first *uide .ledge of the said barrel to .permit the first gui ledge. of the saidizaction-@slide to beiswungd wardly'througn the vertical Acleamiite-passage c the said barrelto permit-the ysaid;action-slide be tilted l laterally; and releasable retainingmeans releasablyrestrainingthesaidactionslid kagainst tilting movement andincluding a retain ing-surface on the said receivg-:rl and .Iaeingin wardly'thereomand a retaining-nngencani tht-th taining-surfaced the saidreceiver i 4. Aiilrearm structure" including'gtin mb n tion: a. receiver;` a barrelvextendig orvvaldlv i .from the `saidreceiver.and provid ,i

` its i sides with v a longitudinallyextending Vvguide-ledge havingan upwardly-'facing .be surface, ythe said @barrel alsobeingi formed on i --opposite side'from the saidrstguideA-lle'dge with` ,a longltudinallyeextending seconde-guideg-ledg l also having .an upwardly-facing bearing-mace interrupting clearance-passage the saidfbarrel `also being formedwith'ravertical adlns `down f wardlyffmm :the lopperL surface 5o ther-sardinas said first guide-ledge at a point intermediate the `:reimective opposite ends yor. the said first *guide-f ledge: an action-slide movable longitudinally.- with respect tofthe 4'said receiver and the said .l i ing-surface normally n riding upon fth`e; bearing surface of the first guidef1edge-otzlthesaid `han' barrel and provided witha longitudinally-extendbearingfsuriace normally riding upon the bearing-surface of the nrst guide-ledge oi the said guide-ledge at' akpoint .intermediate the respec tive opposite ends of the said nrstsuldeled `speeettothe saidreceiverand theLsaid'sbarrelan guide-ledge lleaving a dovvnwe.'rdly-facing liberar rel, thesaid action-slide alsobelngfprovidedwitn 4 a longitudinallxrfextending` second gguideled eA barrel, the said actionslide also being provided V; Y

- normally riding upon the 4bearing\;suri'ace```it`` the with a longitudinally-@extending `secondiguide-v` ledge `having a `downwardly-facing `bearing-sur-k face normally ridingupon the bearing-surface oif 'the second'guide-ledge of the said barrel, the rst guide-ledge of thesaid action-slidexflseing i shorter thantlie vertical interrupting clearance passage leading `downwardly fromlthe upper sur-A i -Ioce of the rst guidefledge o! the said barrel Y having;` a ,downwardlyffacingV bearingsurf second guidededge' of vthelisaid'mirrelethe nil-'st guide-ledge `of the, saidLaction-lslidebeln y'shorter than the vertical interrupting l ncletufanc passage:

ance-passage of the said barrel to permit the said action-slide Vto be tilted laterally; and relevasable retaining-means releasably restraining thesaidf'i action-slide against tilting movement and including a retaining-surface on. the said receiver and racing inwardly thereon, and a retaining linger carried by the said action-slide'andeng'ag ing with the retaining-surface ci the said rev.

ceiver.

5. A rearm structure including in columna'-nl tion: a receiveriormed in the'cuterface'foone.- of its side walls with an upwardly-opening lon-4 gitudinal groove having a retaining-surface facing inwardly toward theaxis of the said receiver;

a barrel extending forwardly from the said' receiver and provided on one of its sides with a .longitudinally-extending rst guide-ledge havv :normally riding upon the'llearing-surface ofthe ing an upwardly-facing bearing-miese, the sind barrel also being formed on its opposite side from the said nrst guide-ledge with a longitudinallyextending second guide-ledge also having an upwardly-facing bearing-surface, the said barrel also being formed with a vertical clearance-passage leading downwardly from the upper surface of the said rst guide-ledge; an action-slide movable longitudinally with respect to the 'said receiver and the said barrel and provided with a longitudinally-extending first guide-ledge having a downwardly-facing bearing-surface nor mally riding upon the bearing-surface of the rst guide-ledge of the said barrel, the said actionslide also being provided with a longitudinallyextending second guide-ledge having a downwardly-facing bearing-surface normally riding upon the bearing-surface or the second guideledge oi' the said barrel, the rst guide-ledge of the said action-slide being shorter than the vertical clearance-passage leading downwardly from the upper surface of the rst guide-ledge of the said barrel to permit the rst guide-ledge of the said vaction-slide to be swung downwardly through the vertical clearance-passage of the said barrel to permit the said action-slide to be tilted nterny; and a retaining-anger calmed by' the said action-slide and extending downwardly into the upwardly-opening longitudinal groove in Y the side wall of the said receiver to releasably restrain the said action-slide against lateral tilting movement. 6. A rearm structure includim in combination: 'a receiver formed in the outer face of one .of its side/walls with an upwardly-opening longitudinal groove having e. retaining-surface facing inwardly toward the axis of the said receiver; e. barrel extending forwardly 'from the `second guide-ledge of the "said barreLTLtheLrs't. vguide-ledge of the said action-slide'being :shorter than the vertical interrupting clearance-passage leading downwardly from thezupperff surface, oi the rstiguide-ledge'offthe said-barrel to" be swung downwardly through thevferticjal clear-H anQe-.passaee-of the vSaid barrel. t0 said laction-,Slidelibe tilted-"flat" action-slide against lateral tilting movement.

7. A rearm structure including in combina..

tion: a receiver-formed in the outer face-oi one of its side walls.with an outwardly-openingrecess and with an upwardly-opening 'retaininggroove communicating with and; parallel with the bottom Portion 'of 4thesaidfrenesia;

a barrel extendingv forwardly i'romfthe'-"saidireceiver and provided on one of its sides with a f longitudinally-extending first guide-ledge having an upwardly-facingbearing-surfacdthesaid barrel also beingformed on its oppositeside from the said iirst guide-ledge with a longitudinelly-extending second guide-ledgel also having an upwardly-facing .bearing-surface, the said barrel also being formed withl a vertical clearance-:passage leading downwardly from the upper surface of the said rst guide-ledge; an action-slide movable longitudinally with respect to the said receiver and the said 4barrel and prov vided with a longitudinally-extending.lstfgllidesaid receiver and provided. onrone of its sides l with a longitudinally-extending drst guide-ledge `having an upwardly-facing bearing-surface, the .said barrel' also being formed on its opposite side from the said rst guide-ledge with a longii-.udinally-extendingV second yguide-ledge also having an upwardly-facing bearing-surface, the said barrel also being formed with a vertical interrupting clearance-passage leading downwardly from the upper surface of the saidrst guideledge at a point intermediate the respective opposite ends of the said rst guide-ledge; an action-slide movable longitudinally with respect to the said receiver and the said -barrel'and provided with a longitudinally-extending rst guide-ledge" having a downwardly-facing bearing-surface normally riding upon the -bearingsurface of the -rst guide-ledge of the said barledge-having a downwardly-facing bearing-surface normally riding upon the bearing-surface of the rst guide-ledge o f the saldi barreL the said action-slide also being provided "with: a

longitudinally-extending second guide-ledge` having a downwardly-facing bearing-surface normally riding upon the bearing-surface of thel second guide-ledgeoi thesaid barrel, the rst f guide-ledge of the said action-slide being yshorter than the vertical clearance-passage leading downwardly from the upper surface ofthe r'st guide-nage of meissie barrel to permit the 'first l guide-ledge oi the said action-slide tobe swung downwardly through the vertical clearance-passage of the-said barrel to permit the said actionslideto be tiltedlaterally: and a' retaining-"nnger projecting laterally into the'outwardly-opening recess in the sidewall oi thereceiverfand downwardly intothe upwardly-opening retaining-groove in the said receiver .to releasably re'- strain the said action-slide against 'lateral tilt- 8. A iirearm. structure including'fin' comi-Sination:` a Areceiver formed inthe `outer face' ot one of its side walls with an outwardly-opening lre.

cess and with an upwardLv-openingjretainingrel, the sa'ld action-slide also-being provided with groove communicating with and .extendingfpar- I allel'with the bottom portion of the Asaidjrecess:

. :a barrel extending forwardly from the said receiver and provided on one ofy its'sidesj with a longitudinally-extending irst ginde-ledgehavlng an upwardly-facing bearing-surface, the

said barrel also being formed on its -opposite;side from the said rst guide-ledge with allongitudinelly-extending second guide-ledge alsohaving an upwardly-facing rel also being formed livitlli?.` verticalfinterrupting clearance-passage leading downwardlyftrom the upper surface offthe said ""iirstjguide-ledge the rst guide-ledge o i the said action-slideto t the bearing-surface, jthesaid barl said receiver andthe fsaidbarrel and provided with a longitudinally-extending iirst gilderledge' w havingj a `downWax-diy'-`,iacing`Ybearing#surface. normally riding` upon thebearing-surfacej of the first guide-ledget'f .the, saidbarrel,I the said ac-f tion-slide also ybeing provided `with a` longitudinallyextendingsecond` guide edge having* a. fiovi'nwardlv facinglA `bearingfs riding upon the bearing ledge of the saidaction-siide to be swung down;

vwardly `'through the: vertial i interrupting 1clear t y ance-passage` of-thesaid barrel to permitthesaid action-slide tojbe tilted laterally; and a vreminins-nnee'r projecting 12iicr`e1-1yJ ifm th uiwm ly-opening recess in the" ide wall of thefreceiver and do,vvzriwai'diir intotlie upwardly-opening `re"` taining-groove inthe said receiver to releasa'bly restra f the said action-slide against lateral tilting movement.

9; A means structure including in combina; 1 tion: a receiver; a barrel extending .forwardlyL from the said receiver 'and provided 'on one ot its sides with a iongitudinaliy-extending rst guideledge having an ku])Wax'diyffacing 'bearing-surface, the saidbarrel'falsobeing formed on its op.

' positev sidefrom the said'rstguide-ledge with a longitudinally-extending' second guide-ledge also having anpwardlyffa'cing bearingesuriace; the

said barrel also lbeing formed rwith a. Vvertical ,l

1 olearancepassage' leading downwardly fromithe y g g appel-,surface o: me 'saialmstguide-iedce:

action-slide, movable longitudinally ywith respect to the saidyreceiver and the said barrel and in-`l cluding; a cross-headfat'it's' forward end and a bar extending rearwardly from thegsaid crosshead "alongside of thesaidfreceiver, the "cross-head oigftheaction-slide comprisingtwo side walls yrespectively located 'adjacentr the op site 'sides ofthe saidbarrl andafcross-wall. u

ending beneath `,the sai ibarrel and connecting the two said side walls; one of lthe said side wallsi of, the cross-head 'of "tneaction-slide being' ;p vided with a longitudinally-extending iirst guid ledge `having a' downwardly-:facing bearing-sur `tace lnormally riding upon the bearing-mace of the first guide-ledge of the said barrel and having a :length shorter than'thel length of the vertical' clearance-passage leading downwardly iromathvefupper surface of the rst guide-ledge'y of thesaid barrel to permit the Vnrst guide-ledge of the said" action-slide be swungf wnwardly throughthe vertical clearance-passage "or lfthe said barrel to permit `theaction-slide' to be Atilted laterally,` th otherofthe'side walls zof the cross-head of th action-slide "being also provided with" la -longi w tdinally-extending n from the"said"receiverfandw rovided onone ofI vits sidesr with `a."longitudinally-extending` nrst ginder-ledgehaving an upwardly-facing bearing at a point intermediate'the respective opposite V"pposite side from the said nrstguide-ledge witiify ends oi the seid first guide-ledge: an actionslide movable longitudinally with respect vto the rinsurfa normally s action-slide comprising Atwoisid t tively located adjacent the `said` barrel andf` 'a` cross-#wally i n 'web the -said'barrel and connecting Wallsfoneof the sidside' Walls ofthe" actiomsude; beingfprovided ence-"passage leadingdownwar `per surfacev offthejnrstfguide-ledge fi.

i f barrel tol permit th rehjE and i releasabie etainin'g-mea estraining the said s .ctimfsiide ilting movement;

. from the said` receiver and provided Aits "sides .1 with aflongitudinaliyext guide-ledge havingfan up rdly-iac inif ` L [to 'the saidre'ceiver andfthesaidg ciuding a cross-head1 at its forwardw end and `j1bar @extending rearwardly "from "the ll'said c ad alongside oijthesaidreceiverfthesaid cross h` ad of the aotionlslide coninrisintwosideiwall respectivel'yflocated adjacent the 'o o! `the saidbar'relv and across-wallbeneathv thev saidxbarrel andconn inv 'side walis'; oneof thes'aid" sid walls fixthe" cross-head of the' action-slide being-p vided'with n'gitudinally-extendingilrst gui edge i' g c th ,vertical ciearan prrkiittheNaction-slideito th other of vtiiesihde irwalls irtli 'e action-slidebeing also provid tudinallw-ertending second guide-ledge having a l racing bearing-stuiace normally ig you dhe bearing-surface ci the second guidededge oi the said barrel; and releasable retaining-means releasa'nly restraining the said action-slide against tilting movement and including a retaining-sru-iaoe on the said receiver and racing inwardly thereon, and a retainingfinger carried by the said action-slide and engaging with the retaining-surface of the said l2., ii :Firearm structure including in combination: a receiver; a barrel extending forwardly trom the said receiver and provided on one of its with a iongitudinalhhextending iirst guideledge having an upwardly-facing bearing-surface, the said hai-rel also being formed on its opposite side irom the said first guide-ledge with a longitudinally-extending second guicle-ledge also having an upwardly-facing bearing-surface, the said harrel also being formed with a vertical interrupting clearance-passage leading downwardly the upper surface of the said hrst guideledge at a point intermediate the respective opposite ends oi the said iirst guide-ledge; an action-slide movable longitudinally with respect to the said receiver and the said barrel and provided with a longitudinally-extending first guideledge having a downwardly-facing bearing-suriace normally riding upon the bearing-surface oi' the iirst guide-ledge of the said barrel, the said aetion-slide also being provided with a longitudinally-extending second guide-ledge having a downwardlydacing bearing-surface normally riding upon the bearing-surface of the second guide-ledge oi the said barrel, the iii-st guideledge ci the said action-siide being shorter than the vertical interrupting clearance-passage leading downwardly troni the upper surface of the niet guide-ledge oi' the said barrel to permit the drst guide-ledge of the said action-slide to be said barrel and connecting the two said side walls, one oi the said side walls of the cross-li d i the actionmslide being provided with a lo nelly-extending iirst guide-ledge having a downwardly-facing bearing-surface normally riding upon the bearing-surface of the rst guide-ledge of the said barrel and having a length shorter than the length of the vertical clearance-passage leading downwardly from the upper suriace of the rst guide-ledge of the said barrel to permit the iirst guide-ledge of the said action-slide to be swung downwardly through the vertical clearance-passage of the said barrel to permit the action-slide to be tilted laterally, the other of the side walls of the cross-head of the actionslide being also provided with a longitudinallyextending second guide-ledge having a downwardly-facing bearing-surface normally riding upon the bearing-surface of the second guideledge of the said barrel; and a retainingwflnger carried by the bar of the said action-slide and swung downwardly through the vertical interrupting clearance-passage of the said barrel to permit the said action-slide to he tilted laterally; and releasaole retaining-rneans releasably restraining the said action-slide against tilting movement and including a retaining-surface on the said receiver and racing inwardly thereon, and a retaining-linger carried hy the said actionslide and engaging with the retaining-surface oi the said receiver. y

iii. el iii-carin structure including in combination: a receiver formed in the outer face of one oi its side walls with 'an upwardly-opening longitudinal groove having a retaining-surface facing inwardly toward the axis of the said receiver; a harrel extending :forwardly from the said receiver and provided on one of its sides with a iongitudinally-eirtending first guide-ledge having an upwardly-facing bearing-surface, the said harrel also being formed on its opposite side from the said iirst guide-ledge with a longitudinally- `:attending second guide-ledge also having an upwardlvd'acing hearingnsuriace, the said barrel also being i'orrried with a vertical clearance-passage leading downwardly from the upper surface oi' the said idrst guide-ledge; an action-slide movedile longitudinally with respect to the said receiver und the said barrel and including a crosshead its iorward end and a har extending rearwardly from the said cross-head alongside of the said receiver, the said cross-head oi the actionmslide comprising two side walls respectively located adjacent the opposite sides of the said harrel and a cross-wall extending beneath the extending downwardly into the upwardly-opening longitudinal groove in the side wall oi the said receiver to releasably restrain the said action-slide against lateral tilting movement.

14. A rearm structure including in combination: a receiver formed in the outer face of one oi its side walls with an upwardly-orening longi tudinal groove having a retaining-surface facing inwardly toward the axis of the said receiver; a barrel extending forwardly from the said receiver and provided on one of its sides with a longitudinally-extending rst guide-ledge having an upwardly-facing bearing-surface, the said barrel also being formed on its opposite side from the said first guide-ledge with a longitudinally-extending second guide-ledge also having an upwardly-facing bearing-surface, the said barrel also being formed with a vertical interrupting clearance-passage leading downwardly from the upper surface of the said iirst guide-ledge at a point intermediate the respective opposite ends of the latter: an action-slide movable longitudinally with respect to the said receiver and the said barrel and including a cross-head at its forward end and a bar extending rearwardly from the said cross-head alongside of the said receiver, the said cross-head of the action-slide comprising two side walls respectively located adjacent the opposite sides of the said barrel and a crosswall extending beneath the said barrel and connecting the twosaid side walls, one of the said side walls of the cross-head oi the action-slide being provided with a longitudinally-extending rst guide-ledge having a, downwardly-facing bearing-surface normally riding upon the bearing-surface of the first guide-ledge of the said barrel and having a length shorter than the length of the vertical interrupting clearancepassage leading downwardly from the upper surface of the rst guide-ledge of the said barrel to permit the first guide-ledge of the said actionslide to be swung downwardly through the said interrupting clearance-passage to permit the action-slide to be tilted laterally, the other of the side walls of the cross-head of the action-slide being also provided with a longitudinally-extending second guide-ledge having a downwardlyfacing bearing-surface normally riding upon the bearing-surface oi the second guide-ledge of the said barrel; and a retaining-nnger carried by the bar of the said actionslide and extending downwardly into the upwardly-opening longitudinal groove in the side wall of the said receiver to remomes oction-slide being also provided with a. longitudinelly-extendins second guide-ledge having o downwardly-facing bearing-surface normally riding upon the bearing-surface of the second guide-ledge oi the said barrel; and a. retainingnger projecting laterally from the bar of the said action-slide into the outwardly-opening recess in the side wail of the receiver and downwordly into the upwardly-opening retaininggroovein the said receiver to reelasabiy restrain l0 the said action-slide against lateral tilting mov ment, the said retaining-miser being positioned on the bar of the action-slide so as to register with the clearance-notch in the receiver at the same time that the rst guide-ledgeof the actionslide registers with .the vertical clearance-passage leading downwardly from the rst guideledge of the said barrel.

FREDERICK L. HUMESTON.

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