US2402086A

US2402086A - Firearm

Info

Publication number: US2402086A
Application number: US536876A
Authority: US
Inventors: Leon A Rix
Original assignee: Remington Arms Co LLC
Current assignee: Remington Arms Co LLC
Priority date: 1944-05-23
Filing date: 1944-05-23
Publication date: 1946-06-11
Anticipated expiration: 1963-06-11

Description

Jung l1, 1946. A, mx 2,402,086

FIREARM Filed May 25, 1944 llllllll INVENToR Yo/v v4. /x B ATToRN Ys Patented June 11,A 1946 UNITED ST FIREARM Leon A. Rix, Ilion, N. Y., assigner to Remington Arms Company, Inc., Bridgeport, Conn., a corporation of Delaware 3 Claims.

The present invention relates to firearms, and particularly to firearms of the magazine type wherein a plurality of shot lshells are carried in a magazine tube for automatic feeding to the receiver.. In rearmsof this type the magazine tube is secured in the forward end of the receiver and is carried in the fore-end piece which abuts the forward end of the receiver. The forward end ofthe magazine tube is closed by a magazine capwhich constitutes a forward abutment for the foreeend, thefore-end being channeled to receive the=lower end of the barrel which carries a lug encircling the magazine tube and pressed forwardly against an abutment shoulder of the foreend by means of a recoil spring, also encircling the Vmagazine tube. Upon ring, the barrel recoils'relatively to the fore-end and the receiver to perform the operations incident to electing a red shell and reloading. After completion of the recoil movement of the barrel it is thrust forward by the spring and the shock of the impact of the lug with the abutment shoulder of the fore-end is transmitted to the fore-end and the parts of the rearm associated therewith. As the magazine-cap is opposed to the recoil shock in the fore-end it is apt to jar loose or turn after repeated firing. Also barrel expansion from the heatof repeated ring may affect the relative t between the parts and cause looseness. It is an object of the present invention to provide an effective locking means for preventing the magazine cap from jarring loose or turning, while at the same time permitting it to be readily adjusted to take up looseness or to be removed for the purpose of assembling or disassembling the foreend.

Afurther object is to provide a magazine cap structure which may be engaged with any desired degree of tightness, and is effectually locked against jarring loose or turning in any position of adjustment. l

Another object of the invention is to provide a magazine cap structure of relatively simple and economical manufacture, permitting it to be quantity produced by modern rmanufacturing methods, while still maintaining extremely accurate fit and cooperation between its parts.

Q iWith the above and other objects in view, an

embodiment of the invention is shown in the accompanying drawing, and this embodiment will behereinafter more fully described with reference thereto, and the invention will be finally pointed out in the claims.

In the drawing:

Fig. 1 is a fragmentary longitudinal side ele- Fig. 4 is a horizontal sectional view, taken along the line 4 4 of Fig. 2.

Fig. 5 is a detail inner end elevation of the magazine cap element, removed from the firearm.

Fig. 6 is a detail forward end elevation of the detent washer element, removed from the firearm.

Similar reference characters indicate corresponding parts throughout the several figures of the drawing.

Referring to the drawing, the firearm illustrated by way of example, and in which the invention is embodied, is of the automatic repeating type and comprises a barrel I0, a receiver I I, and a fore-end I2, the rearward endvof. the fore-end abutting the forward end of the receiver II and preferably being provided with a tenon I3 seated in a recess I4 in the receiver, as shown clearly in Fig. 1. Rigidly secured to the barrel I0 is an apertured lug I5 which encircles the forward end of the magazine tube I6, the latter being secured at its rearward end in the receiver and extending in longitudinal relation through a channeled recess I1 in the fore-end and having its forward end engaged in a cylindrical passagevIB in the forward part of the fore-end, this passage terminating at its rearward end at a shoulder I9 of the fore-end against which the apertured lug I5 is normally engaged. A recoil spring 20 is engaged about the magazine tube I6 and is compressed between the forward end of the receiver and a friction collar 2| slidable upon the magazine tube and normally'pressed forwardly against the apertured lug I5 by the recoil spring. Upon firing the gun the barrel I0 recoils with respect to the receiver, the magazine tube and the fore-end, the apertured lug I5 moving rearwardly with the recoil end compressing the spring 20, Which, at the end of the recoil movement, returns the barrel to its normal position. The recoil spring necessarily having considerable power, the lug I5 Vis brought against the shoulder I9 with very substantial force and the shock of stoppingthe barrel is transmitted to the fore-end` where it is opposed by the magazine cap secured in the forward end of the magazine tube, and presently to be more fully described.

Within the forward end of the magazine tube i6, which is substantially ush with the forward end surface of the fore-end l2. there is engaged a bushing 22, xedly secured therein by brazing or other suitable methods, and provided with an internal screw thread Z3. At its inner end the bushing-isfbeveled inwardly and is provided with a circumferential series of radial tooth serrations 24 of ratcheting V-type.

Within the magazine tube there is engaged la shot shell follower 25, engaged at its forward side by the magazine spring 26 which normally exerts rearward expansive force upon the follower to. press the shot shells 21 rearwardly in thema'ga zine, this spring engaging at its forward end with a detent washer 28 seating against the inner end of the bushing 22.

The detent washer 28 is of dish formf-with-its circumferential marginal portion beveled to conform to theinwardly beveled end of thebushing 22, and this marginal portion has pressed therein a series ofratch'etingteeth 29 disposedat a corresponding angle to. the teeth 24 ofthe bushing andmeshingl therewith, being firmly pressed into engagement with the end ofthe 'bushing lby the expansive force of 4themagazine spring 2S. The angularity of the V-shapedjteeth is suchthat upon turning movement being imparted to the kthe key projection of the detent washer, and

detent washer the teeth of the kwasher will ride over the teeth of the bushing, thedetent l,washer as it .is rotatedfromone tooth toithenext moving away fromthe bushing against the, force of the spring and reseating against the bushing under the force. of the spring.

Upon thefforwardA side of the detentfwasher there. isprovided a-,diametrically disposed key projection 30, preferably pressed therefrom, land adapted tocooperatiyely interlock with the magazine cap, `as will presently more fully appear. The height of th'e key projection 30 is. greater than the depthoi the teeth 24 and 2.9 of the bushing.v andwasher, for the` purpose of maintaining the. interlocking relation of the ywash'er with the cap. duringratcheting movement of the washer, as will presentlymore. fully appear. e

The magazine vcap comprises a head 3| providedwith a, relativelywideseating shoulder 32 adaptedtobe engaged with asubstantial surface ofV the forward end ofthe fore-end I 2v insuri rounding, relation to the forward end' 0iA the magazine tuba tov retain the ,assembled relation of the fore-end. A threaded stud 33 projects axially from the shouldered end of the headl and is screwed into the-internally threaded bushing 22. Atits inner end the. stud isv provided witha diametrically disposedkey slot 34, adaptedv to be interlockingly engaged by the ,key projection 30 of the detent. washer.y Thelength of the stud is. predetermined so that in its fullyvengaged position,` with the shoulder 3.2`abutting the for.- ward end of the fore-end, and with the washer in fully seated meshing engagement with the inner end ofthe bushing 22, the inner end of the studisV slightly spaced fromthe forward side. of the ,detent washer. Thus.when.the cap is tightly adjusted it will not raise. the detent washer out of, engagement with the bushing. The. depth' of the slotV 34 and the corresponding height of the key projection 30. are suchthat engagement will be maintained therebetween when the cap is not fully engaged'. Th'us, as the magazine capv is screwed'intoplacel it becomes interlocked with thereupon during the completion of the engaging movement of the cap the detent washer is turned with it, the teeth of the Washer ratcheting over the teeth of the bushing 22 until the cap is tightly engaged with the forward end of the fore-end. In this tightly engaged position the teeth of the washerare ,in fully seated meshing engagement with the teeth of the i'lxed bushing under the pressure of the magazine spring 26, and the cap is thus resiliently held against turning relatively to th'e magazine tube. In order to further tighten orto. remove the cap it is simply turned in one orthe other directions with suiiicient force to cause the Vdetent ,washer to ratchet over the end of therbushing A22.

The form ofthe invention illustrated in the drawing and described herein is typical and illus'- trative only, and it is evident that the invention is capable rof embodiments mother forms, all falling within the scope of the appended l.clainris which are to Vbe broadly construed.

What is claimed is:

1. In a rearm comprising a barrel, acartridg,e holding magazine associated Vwith said barrel,l` a` cartridgeffeedingspring in said magazine, and `,a fore-end mounted on said magazine: means for. holding said fore-end -in assembled relationship with said magazine comprising amemberh'aving threaded engagement with said, magazine and abutting, said fore-end, yan abutment assoald with said magazine, a detent memberurgedto engage said abutment by said cartridgeffeeding spring, and means associated respectivelywwith said fore-end-holdingmember and said 4detent member for resisting relative rotation therebe` tween. Y

2. In a rearm comprising a barrel,I a cartridge,-

holding` magazine associated with said barrel, la'

cartridge-feeding spring in said magazine, Aand a fore-end mounted on said magazineff means for holding said fore-end in assembled relxationgship with said magazine comprising a` forerend holdingvmember threadably engageable with' the magazine, a serrated abutment within andsef cured to said magazinefa serrated detentmemf ber yieldingly urgedinto interlockingdengagegment with said abutment by said cartridge feedf ing spring, and interlockingmeans associatedwith said detent member and said fore-end holding member arranged to engage each other as said fore-end holding member is advancedyto effective position.

3. In a firearm vcomprising a barrel, na cartridge,-` holding magazine associated with said barrel, a cartridge-feeding spring in said magazine, and a fore-end mounted on said magazine: meansfor holding said fore-end in assembledrrelationship with said magazine comprising interioxfly threaded collar secured within said magazine and provided with a serrated end, a serrateddetent member yieldingly urged into engagementwitn the serrated end of 'said collar by said` cartridge: feeding spring, a fore-end holdingcap member provided with a threaded bossfor engagementin said interiorly threaded collar, and lugfand-slot means associated with said boss and detentmember and arrangedy to engage eachother ashsaid cap member is advanced to fore-end holding position.

LEGNA. RTX.