US2482842A - Sear-control means for firearms - Google Patents

Description

Sept. 27, 1949. CROCKETT SEAR-CONTROL MEANS FOR FIREARMS 2 Sheets-Sheet 1 Filed Sept. 2, 1948 Patented Sept. 27, 1949 SEAR-CONTROL MEANS FOR FIREARMS Harry L. Crockett, New Haven, Conn., assignor to Olin Industries, Inc.', New Haven, Conn., a

' corporation of Delaware Application September 2, 1948, SerialNo. 47,361

The present invention relates in general to firearms, and, more especially, to sear-control means by which the's'ear may be stopped normally after releasing the firing-means but which will permit additional displacement'of the sear for the purpose of withdrawing the action from the chamber of the receiver.

An object of the invention is to provide a superior sear-control device for firearms which is inexpensive to manufacture and simple and reliable in operation.

A further object'of the invention is to provide an improved sear-control device for bolt action firearms wherein the device has the multiple func tions of a sear-stop, a bolt-stop control-means, and means for latching a box-magazinein'the frame of the firearm."

Claims.

With the above and other objects in'view, as I will appear to those skilled in the art from the present disclosure, this invention includes all features in the said disclosure which are novel over the prior art.

In the accompanying drawings, in which certain modes of carrying out the present invention are shown for illustrative purposes:

Fig. 1 is a broken side elevation of a bolt-action firearm embodying the improved sear-control device of this invention, the stock and associated parts of the firearm being omitted;

Fig. 2 is a broken side elevation in sectionof the firearm, similar to Fig. 1, and showing the action arm includes, in brief, a receiver ID of tubular form, into the forward end of which the rear end of a barrel II is threaded or otherwise secured. The receiver [0 is also provided with an axial bolt-receiving passage I 2, the forward upper portion of which is intersected by a transverse loading-and-ejection opening l3.

Mounted in the bolt-receiving passage l2 of the receiver NJ with capacity for reciprocation therein is a cylindrical bolt l4 provided with a longitudinally-axia1 firing-plunger guideway [5 which is intersected at its forward end by a relativelysmall eccentric firing-point passage l6. Projecting through the passage I6 is the firing point I! formed at the forward end of a firing-plunger 18, the latter being mounted in the guide-passage l5 in the bolt I 4, with capacity ,for reciprocation therein relative to said bolt.

The rear portion of the breech-bolt I4 is reduced in diameter in the manner characteristic of firearms ofthis type, to provide a smooth cylindrical exterior surface upon which turns a boltoperating sleeve l9 having a laterally-offset operating-handle 20 terminating in a ball-grip 2|. The bolt-operating sleeve I9 is adapted to beheld.

in place upon the reduced rear-end portion of the closed and thefiring-pin-held in cocked position by the sear, the improved sear-control device serving as a latch to hold the box-magazine in the frame of the firearm;

Fig. 3 is a broken side elevation in section, similar to Fig. 2, but showing the sear-stop defiected 'fromits normal position by the sear whichhas been pulled downwardly out of the path of the bolt so as to permit withdrawal thereof from the receiver;

Fig. 4 is a perspective view of the sear-andtrigger unit;

Fig. 5 is a perspective view of the improved sear-control device of this invention; and

Fig. 6 is a-perspective view of the box-magazine frame of the firearm.

The improved sear-control device of this invenfully in the Crockett Patent No."2,174,971 of October 3, 1939.

Referring especially to Figs. 1 and 2, the fire bolt M by means of a retaining sleeve 22 which is mounted upon the reduced rear-end portion of the bolt and secured in place thereon by a transverse retaining-pin 23.

The reduced rear-end portion of the bolt is provided with an axial aperture 24 constituting an extension of the aperture 15 of the bolt for accommodating a helical firing-spring 25 which bears at its forward end against the rear end of the firing-plunger I8 and at'its rear end against an end-plug 26 secured in the rear end of the axial aperture 24 by the aforesaid transverse pin 23. The main portion of the firing-plunger I8 is substantially plate-like and is provided at its rear guide-projection 28 which extends through a lon- I gitudinal slot in the bottom wall of the reduced portion of the breech-bolt, the guide-projection 28 having, in turn, a downwardly-extending lug '29- which is adapted to project into operative engagement with a cam-slot 30 formed in the bolt- 7 operating sleeve l9.

Formed on the underside of the firing-plunger I8 is a forwardly-facing cocking-shoulder 3| which is adapted to be engaged by a rearwardly- The firing-plunger I8 is also formed facing cocking-shoulder 32 formed upon the upwardly-projecting comb 33 of the sear-arm 34 of a sear-and-trigger unit, indicated generally by the numeral 35. Referring especially to Fig. 4, the sear-and-trigger unit 35 includes, in addition to the sear-arm 34, a trigger-arm 36 which depends from the rear end thereof substantially perpendicular thereto and-terminates at its =lowerend in a curvedctrigger or finger-apiece 31; andrza safety-slide 38 mounted for limited longitudinal movement on the underside of the sear-arm 34.5 To this end, the rear end of thesafetkSlideisi slotted longitudinally, as indicated'at 39? to formtwo laterally-spaced guide-fingers 46 -451; the;

inner edges of which are adapted jtorrideairrsuite '15-:-

able guide-grooves 4 l4l formed at the intersection of the trigger-arm 36 with the Sean-arm, 34. The forward end of the safety-slide is held against the underside of the sear-arm 34 by the head-42 of a screw, the shank of which extends freely throughg-a:.1ongitudinal slot 43=of the safety -slide. and,,is secured in the; underside of, :the sear-arm.- 34=,. A verticalslot. 44 isgforrnedin rone-ofthe guide fingers of. thersafety slide and-is :adapted" toreceive the depending-efinger .45 of a,manuallyoperable safety-slide operating-tarm- 46-1 pivotally mounted on the pivotzepina ll-of.the seareande triggerunit, 35 lhereinabove described; The fonwardrend ,of; the 1safety-slide 38ds provided with adown:tunned,lip .48awhich by manual movier-nent.- of the-operating arm 46,,is,adapted;to b,emoved into and; from engagementfiw-ithy-a -,-shoulder: of abox-magazine if rame,.-as vand'fori the purpose here inafter ;des(;:ri loed. v The 'forwaiid enda of thesear-- arm- 34 1s provided with a ,-forward1yextending; nose 49,,z-the underside-50@ofewhichconstitutes a: substantially horizontal-bearinggsurf ace adapted to rest upon thegupper,endnofr;a';sear=sp17ing,-.5l' which, is: adiustably mounted-,ina a vertical aperture; in, the rear end of the aforementioned boxmagazine frameand, provides the; force for-yieldingly holding the =rearwardlyr-facingr; cooking; I shoulder $2 of the :sear-comb' 33 ineeng r fimentz. with ,the vforwardly-vf-aoingecocking shouldep 3 lofthe springeloaded firing,- .plunger I 8.1:

Ingthis connection, -it-wi1l1beinoted that theforward end of' the sear-arm34 and specifically the sear-comb 33 and: Sear-nose. 49 aregsupported 1' within-a vertical slot 52'.! in ,the underside, of -,11he receiver for movement thereinit to; en a e the cocking-eshoulder 32.-;-0f the sear comb :33 with and to disengage ,it from :thezcocking-shoulder SI .of the firing plunger.

The particularfirearmshownherein:is;-adapted to ba rovidedwi h a ,b W -m aZinB; and this; end-the iunderside of -;the receiversis; provided 1: with; a second: :vertical slot-i531 ,forwardly of I the, slot- 52 i and --interseeting; the bolt-passage -l 2 of the receiver; Mounted-on thegundersidemf-the receiver -=and; ,opposite its ,-s10ta53,,-- is a box-magae zine frame; indicated-;generally-at 54 ineiFig. n6,- for: l-releasably supporting a box-magazine 55.x The: latter isof conventional construction em bodying substantially-flat side-,plates 56::-56 and arcua te front rand-rear end walls 551(- and 53: respectively joined to-theside-plates, the, front and 4 rectangular block divided into front-end and rearend portions 64 and 65 respectively by a boxmagazine receiving-aperture 66 formed vertically in the right-hand side of the frame, the forward and rearward walls 61 and 68 respectively of the aperture 66 sloping downwardly and forwardly to conform to the curvature of the front and rear end walls 51-and- 58 :respectively-*of the (box-magazine: ,55, the "curved: Wall's ofhthei aperture being formed with longitudinal ribs 69 and 10 respectively, for engaging in the respective channels 61 ,and,6 2 of the box-magazine. The front end -64of' the'frame 54 is notched on its underside, asiiashowtn' especially Well in Figs. 1 and 2, and::istprovidediiwith a vertical aperture H for accommodating-an: assembly-screw 12 adapted to secure. the, front end, of the frame to the underside of the receiver, with the vertical apertuneififiii'ofuthe frame in alignment vertically with the slot 53 in the bottom of the receiver for accommodating the :upper: enditof-rthe boxemaga ne. The -;-re ar:endpprtione65 ofthe.-fr.ame- 54 jisaalso 2* provide d twith; aa :vertioal: aperture -1 3 tOwI'GBGiVErr an" assembly-screw] May which the rear-lendrportion ofrthe aframe. is secured; to, the. underside of--v the. receiver immediately grearwardly; ofeitss vex: tical aperture 53. In thissconnectiont ili'will bes; noted that the, upper;surface:of :the framerflr-is for-med with a .-slightly-ooncaveecylindrical faceof revolution; the asurvature 10f whi(decor-ree-- so i,-

rear walls being-set inwardlyysl-ightly of the front and rear: edges 5 9: and 63 respectively of thesideplates; 56;-.56-, soiaswto form channels-6 I and 62.- Apair of subs.tant ially rectangular notches 63. are formed ring-the oppositely-disposed edges,-66 of-thechannel 62 for accommodatingglugsvof-the-bore magazine, latching-means hereinafter described. Referringdmparticular to Fig-t. (i -the, box magazine 7 frame 54 comprises-ta.- substantially-g sponds to the curvature of theunderside of the? receiver, so. that:the framelmaygmake a snug: fit therewithwhenassembled thereonrbygthascrews 12 and T4:

li -longitudinal clearance-rreccssflhis provided? in the lupperwsurfaceiof the frame; the; clearance:- recess being substantiall U-shapediin-rcross :Sece' tion at its :intersectiom withzthe ma-mend: ofithe frame, and the zbottomrof ther-recesssslopingmps-- wardly .-and r-fonwardly 1 from its .rintersectiom w-ith the rearend ,of thez fnama; toi-intersect the :upper concave surface thereof Formed in thezupyvardw 1y,-sloping:bottom frthe;clearancearecess l5 is-a substantiallyJeI- tioal internally-threadech; aper- -tture 16 which is adaptedato-laccommodateeanead justi-ngescrewa ll which inxlturmi.supports the aforementioned-sean-spring 5 l: intthefaperture :16 'e with its upper, end inx engagement: with the-under; side 50 of the sear=nose-49e In .this connectiomita will -be-noted thatatheeclearanoeereeess 5| 5 of, the

frame-is immediately opposite theyvertical slot 52- in the: underside of -.the,receiv.er.-whichr accommoedatestthe sear-noses. 49 ofe the: sear-.and-triggere unit 35.-=

Cooperatively associated withpthe .boxernaga-- zine-and-the seareandetrigger-nmitrof {the firearm is the sea-mcontroltmeanslofpthis inventions-which? serves both as; aesearestop'and; as az-latch forre: leasably securing -;the- :box magazine :im thecframe Ofi-the firearm-n. The sear-control mean -as indi cated generally at 13, and, as shownain -detail-in Fig.- 5, is; a substantially -Z -shapeda-member formed of fiat sheet-metal stock and comprising'a substana tiall-y-rectangmar;deaf-portion: '1 9 which constrwtutes, in efiect-,,arelativelyestiifvleafas-pring adapt ed to:be-assembled securely on-thezunderside of the frame 54 by means of the'iaforesaid 'assem ply-screw =1 4, the latter extending-up intothe rear end :of -the eframe through i aevertioalaperture formed :at 'the*forward'-=end zof theleaf spring pore-' tion! 9: ofz-the searecontrol devices In-.:orderirtoirprevent pivotal movementfotrtheri lattervfwithfirespect to rtheframe=,:thezfonward ends.

of the leaf-spring I9 is formed with-tupstanding a z,,-transyerselyespaeed parallel earsrfi Izadapte'd 'inafter referred to as a sear-stop.

to extend upwardly along opposite sides respecportion 83 for flexing the resilient reach 82. Ex-

tending transversely from opposite edges respectively of the resilient reach 82, intermediate its upper and lower ends, is a pair of latching-lugs 84, each of which is adapted to lockingly engage in one of the notches 63 formed in the corresponding vertical flanges 68 of the rear channel 62 of the box-magazine, the latching-lugs 84 serving to releasably secure the box-magazine in the aperture 66 of the frame 54 with the upper end of the box-magazine extending into the bolt-passage I2 of the receiver, for feeding cartridges into cartridge-chambering position.

The rear end of the leaf-spring I9 is formed with an integral upstanding reach 85, the upper edge 86 of which constitutes an abutment here- The latter is adapted to be located beneath the underside of the sear-arm 34 and, more particularly, the underside of the safety-slide 38 intermediate its screw 42 and its lip and to be sp ced Ver ly from the underside of the safety-slide normally a distance such as to permit unrestrained movement of the sear-and-trigger unit when releasing the cocked firing-plunger.

As noted above, if after the firearm is cocked, it should be desired to lock the sear-and-trigger .unit 35 against operation by its finger-piece 31,

the clearance-recess 15 thereof. Under these conditions, the sear-and-trigger unit 35 is positively held from pivotal movement clockwise, thereby preventing release of the cocked firing-plunger l8. When the safety-arm 46 is swung forwardly to its off position, the safety-slide 38 will be retracted, thereby withdrawing its lip 48 from engagement with the shoulder 81 of the frame 54. Under these conditions, the sear-and-trigger unit is free to be rocked clockwise by pullin rearwardly on the finger-piece 31 against the compression force of the sear-spring 5| to release the cocked firing-plunger I8 and thus eifect firing of the arm.

In rocking the sear-and-trigger unit clockwise .to release the sear, the sear-arm 34 will swing downwardly until the underside of the sear-arm, and more particularly the safety-slide mounted thereon, is brought into engagement with the upper edge or abutment 86 of the upstanding reach of the relatively-stiff leaf-spring 19. Due to the inherent stifiness of this resilient element of the sear-control means, a substantially-normal pull on the finger-piece 31 of the sear-and-trigger unit will be insuificient to cause the sear-arm to dis- ,place the sear-abutment 86, whereby the latter serves effectively as a positive stop to limit further displacement of the sear-arm. On releasing the finger-piece of the sear-and-trigger unit, the compressed sear-spring 5| will elevate the forward end of the sear-arm into the vertical slot 52 of the receiver for re-engagement of the cookingshoulder 32 of the sear-comb 33 with the cookingshoulder 3| of the firing-plunger l8.

'firearm by a single fastening-means.

In order that the action or bolt I4 may not inadvertently slide out of the receiver when unlocked therefrom, the sear-comb 33 is provided at its forward upper edge with a shoulder or boltstop 88 adapted normally to project up into a clearance-aperture 89 formed in the breech-bolt intermediate its reduced rear-end portion and its head-portion 90, the bolt-stop 88 being adapted to project up into the path of the rearwardly-facing shoulder 9| of the latter, both when the sear is in looking engagement with the firing-plunger and when the sear-arm has been pulled down into engagement with the sear-stop abutment 86. to fire the arm, as hereinabove described.

Assuming the sear to be in its latter position, then if the breechblock is unlocked and pulled rearwardly, the rearwardly-facing shoulder 9| of the head portion 90 of the bolt will bring up against the. bolt-stop 88 of the sear-comb 33, which prevents inadvertent removal of the breech-bolt from thereceiver. However, should it be desired to remove the bolt from the receiver intentionally as, for example, when disassembling the elements of the firearm, the shooter. may lower the bolt-stop 88 of the sear-comb out of the path of the rearwardly-facing shoulder 8| of the breech-bolt by exerting more than the normal rearward pull on the finger-piece 31 of the searand-trigger unit, thereby pullingthe sear-arm 34 downwardly against the sear-stop abutment 86 with sufiicient force to overcome the resistance of the relatively-stiff leaf-spring 19 to deflect the latter downwardly, as indicated in Fig. 3, whereupon the bolt-stop 88 of the sear-comb will lie below the rearwardly-facing shoulder 9| of the bolt-head to permit withdrawal of the bolt from the receiver.

From the foregoing it will be seen that by the construction and arrangement of the elements of the sear-control means 18, a relatively-simple, inexpensive, unitary device is provided, incorporating the functions of a sear-stop and box-magazine latching-memben both of which are of durable constructionand adapted'to be mounted in operative relationship with other elements of the Further, that when assembled to the underside of the boxmagazine frame; the leaf-spring portion 19 of the sear-stop means extends over the kerfed end of the adjusting-screw H of the sear-spring 5| so as to'hide the screw and prevent maladjustment of the sear-spring by those inexperienced with firearms; and that by forming the sear-stop as an inherent part of a resilient leaf-spring, the searstop abutment is operable also as a bolt-stop control-means for permitting the intentional removal only of the bolt from the receiver.

' The invention may be carried out in other specific ways than those herein set forth without departing from the spirit and essential characteristics of the invention, and the present embodiments are, therefore, to be considered in all respects as illustrative and not restrictive, and'all changes coming within the meaning and equivalency rangeof the appended claims are intended to be embraced therein.

I claim:

1. In a firearm, including in combination: a. frame; a spring-pressed firing-member; a searand-trigger unit arranged to releasably hold said spring-pressed firing-member in its cocked position and comprising a sear, and a finger-piece for operating said sear; a box-magazine engageable in said frame and sear-control means comprising -a resilient member having a sear-abutment and in said frame; sear-control means comprising a resilient member having a sear-abutment and a latch-imeans, said resilient member being arranged normally to support said sear-abutment in the path of said sear to stopthe displacement of said sear after disengagement thereof from said cocked spring-pressed firing-member,and to hold said latch-means in engagement with said boxmagazine thereby to releasably secure the latter in said frame; and fastening-means arranged to secure said sear-control means to said frame.

3. In a firearm, including in combination: a frame; a spring-pressed firing-member; a scarand-trigger unit arranged to releasably hold said spring-pressed firing-member in its cocked position and comprising a scar, and a finger-piece for operating said sear; a box-magazine engageable incsaid frame; and sear-control means comprising a unitary leaf -spring member having a sear-abutment at one extremity thereof and a latch-means at the opposite extremity thereof, said leaf-spring member'being arranged normally to support said sear-abutment in the path of said sear to stop the displacement of said sear after disengagement thereof from said cocked spring-pressed firingmember, and to hold said latch-means in engagement with said box-magazine thereby to releasably secure the latter in said frame.

4. In a firearm, including in combination: a frame; a spring-pressed firing-member; a searand-trigger unit arranged to releasably hold said spring-pressed firing-member in its cocked position and comprising a sear, and a finger-piece for operating said sear; a box-magazine engageable in said frame; sear-control means comprising a unitary leaf-spring member having a sear-abutment at one extremity thereof, and a latch-means at the opposite extremity thereof, said leaf -spring member being arranged normally to support said sear-abutment in the path of said sear to stop the displacement of said sear after disengagement thereof from said cocked spring-pressed firingmember, and to hold said latch-means in engage.- ment with said box-magazine thereby to releasably secure the latter in said frame; and single fastening-means engageable with said frame and said unitary leaf-spring member to secure the latter to said frame.

5. In a firearm, including in combination: a movable bolt; a frame; a spring-pressed firingmember; a sear-and-trigger unit arranged to releasably hold said spring-pressed firing-member in its cocked position and comprising a seararm having a sear and a bolt-stop at one extremity thereof and a finger-piece at the opposite extremity thereof for operating said sear and said boltstOp; a box-magazine engageable in said frame; and sear-control means comprising a resilient member having an abutment and a latch-means, said resilient member being arranged normally to support said abutment opposite said sear-arm to stop the displacement of ,said sear-arm after ,dis-

iii)

engagement of said sear from said cocked springpressed firing-member thereby to retain said bolt-stop in the path of movement of said bolt and prevent inadvertent removal thereof from said firearm, said resilient member being arranged to be flexed by said sear-arm by exertion of an abnormal force on the finger-piece of said sear-and-trigger unit thereby to displace said bolt-stop from the path of movement of said bolt to permit intentional removal thereof from said firearm, said resilient member being arranged also to hold said latch-means in en agement with said box-magazine so as to releasably secure the latter in said frame.

6. In a firearm, including in combination: a movable bolt; a frame; a spring-pressed firingmember; a sear-and-trigger unit arranged to releasably hold said spring-pressed firings-member inits cocked position and comprising a sear.- arm having a sear and a bolt-stop at one'extremity thereof and a finger-piece at the opposite extremity thereof for operating said sear and said bolt-stop; a box-magazine engageable in said frame; and sear-control means comprising a unitary leaf-spring member having an abutment at one extremity thereof and a latch-means at the opposite extremity thereof, said leaf-spring memher being arranged normally to support said abutment opposite said sear-arm to stop the displacement of said sear-arm after disengagement of said sear from said cocked spring-pressed firing-member thereby to retain said bolt-stop in the path of movement of said bolt and prevent inadvertent removal thereof from said firearm, said leafspring member being arranged to be flexed by said sear-arm by exertion of an abnormal force on the finger-piece of said sear-and-trigger unit thereby to displace said bolt-stop from the path of movement of said bolt to permit intentional removal thereof from said firearm, said leaf-spring being arranged also to hold said latch-means in engagement withsaid box-magazine so as to releasably secure the latter in said frame.

'7. In a firearm, including in combination: a

" movable bolt; a frame; a spring-pressed firing- -member; a sear-and-trigger unit arranged to releasably hold said spring-pressed firing-member in its cocked position and comprising a sear-arm having a sear and a bolt-stop atone extremity thereof and a finger-piece at the opposite extremity thereof for operating said sear and said bolt-stop; a box-magazine engageable in said frame; sear-control means comprising a unitary leaf-spring member having an abutment at one extremity thereof and a latch-means at the opposite extremity thereof, said leaf-spring member being arranged normally to support said abutment opposite said sear-arm to stop the displacement of said sear-arm after disengagement of said sear from said cocked spring-pressed firing-member thereby to retain said bolt-stop in the path of movement of said bolt and prevent in advertent removal thereof from said firearm, said leaf-spring member being arranged to be flexed by said sear-arm by exertion of an abnormal force 8. In a firearm, including in combination: a frame; a spring-pressed firing-member; a searand-trigger unit arranged to releasably hold said spring-pressed firing-member in its cocked position and comprising a sear, and a finger-piece for operating said sear; a box-magazine having a notch therein and engageable in said frame; and sear-control means comprising a unitary leafspring having a first resilient reach provided with a sear-abutment and a second resilient reach opposite said first resilient reach and provided with a latching-lug, said first resilient reach being arranged normally to support said sear-abutment in the path of said sear to stop the displacement of said sear after disengagement thereof from said cocked spring-pressed firing member, said second resilient reach being arranged to releasably hold said latch-lug in the notch of said boxmagazine to secure said magazine in said frame.

9. In a firearm, including in combination: a frame; a spring-pressed firing-member; a searand-trigger unit arranged to releasably hold said spring-pressed firing-member in its cocked position and comprising a sear, and a finger-piece for operating said sear; a box-magazine having notches therein and engageable in said frame; sear-control means comprising a, unitary leafspring having a first resilient reach provided with a sear-abutment and a second resilient reach opposite said first resilient reach and provided with latching-lugs, said first resilient reach being arranged normally to support said sear-abutment in the path of said sear to stop the displacement of said sear after disengagement thereof from said cocked spring-pressed firing-member, said second resilient reach being arranged to releasably hold said latching-lugs in the notches of said box-magazine to secure said magazine in said frame; and fastening-means engageable with said frame and said unitary leaf-spring member intermediate said sear-abutment and said latch- 10 ing-lugs to secure said unitary leaf-spring member to said frame.

10. In a firearm, including in combination: a receiver; a bolt movable in said receiver; a frame secured to said receiver; a spring-pressed firingmember; a sear-and-trigger unit arranged to releasably hold said spring-pressed firing-member in its cocked position and comprising a sear-arm having a sear and a bolt-stop at one extremity thereof and a finger-piece at the opposite extremity thereof for operating said sear and said boltstop; a box-magazine having notches therein and engageable in said frame; sear-control means comprising a unitary leaf-spring having a first resilient reach provided with an abutment and a second resilient reach in axial alignment with said first resilient reach and provided with latching-lugs, said first resilient reach being arranged normally to support said abutment below said sear-arm to stop the displacement of said seararm after disengagement of said sear from said cocked spring-pressed firing-member thereby to retain said bolt-stop in the path of movement of said bolt and prevent inadvertent removal thereof from said receiver, said first resilient reach being arranged to be flexed by said sear-arm by exertion of an abnormal force on the finger-piece of said sear-and-trigger unit thereby to displace said bolt-stop from the path of movement of said bolt to permit intentional removal thereof from said receiver, said second resilient reach being arranged to releasably hold said latching-lugs in the notches of said box-magazine to secure said magazine in said frame; and a single fasteningmeans engageable with-said frame and said unitary leaf-spring intermediate said abutment and said latching-means to secure the unitary leafspring to said frame.

HARRY L. CROCKETT.

No references cited.

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