US2372614A

US2372614A - Box-magazine construction for repeating firearms

Info

Publication number: US2372614A
Application number: US478059A
Authority: US
Inventors: Carl G Swebilius
Original assignee: Individual
Current assignee: Individual
Priority date: 1943-03-05
Filing date: 1943-03-05
Publication date: 1945-03-27
Anticipated expiration: 1962-03-27

Description

March 27, 1945 c. G. swEBlLlUS v 2,372,614

BOX-MAGAZINE CONSTRUCTION FOR REPEATING FREARMS y Filed March' 5, 1943 2 Sheets-Sheet 1 v y grill/lll lo" r;

N /I//lllllll March 27, 1945. c. G. swEBlLlus 2,372,614

BOX-MAGAZINE CONSTRUCTION FOR REPEATING FIREARMS Filed March 5, 1943 24 Sheets-Sheet 2 www I Patented Mar. 27, 1945 UNITED- seTATEs PATENT OFFICE BOX-MAGAZIN E CONSTRUCTION FOR vREI'EATIN G FIREARMS Carl G. swebilius, Hamden, Conn. Application March 5, 1943, Serial No. 478,059-

8! Claims.

The present invention relates to improvemnts in repeating firearmsy andk relates more particularly to the portions thereof: including and associated with the box-magazines.

One of the objects of the present invention is to provide a'repeating firearm with a superior box-magazine constructionV whereby a box-magazine may be releasably coupled to the firearmstructure in a simple, 'reliable' and effective manner.

Another object of thei present invention isy to provide a structurek of the: character referred to, whereby a box-magazine may be. adequately coupled to the firearm-structure at one end of the box-magazine Without requiring. additional'. support at the opposite end of the said box-magazine.

A further object of the present invention is to provide a repeating rearrrr With a superiorv boxmagazine construction whereby the bolt-stop-actuator of the magazine-follower may be adequately protected against accidental injury.

With the above and other objects: in View, as will appear to those skilled in the art from the present disclosure, this invention includes'all features in the said disclosure Whichare novel over`v l the prior art andwhich are not claimed in any taken on the line 2--2 of Fig. 1, but on a larger scale;

Fig. 3 is a similar view taken on the line 3-'-3 og Fig. l;

Fig. 4 is a View of the box-magazine detached,

shown partly in side eleva-tion and partly in section;

Fig. 5 is a View in rear elevation ofithe boxmagazine;

Fig. 6 is a tcp or plan view thereof;

Fig. 7 is a broken view inside elevation of' the forward portion of the. frame or trigger-plate;

Fig. 8 is aview thereof in front elevation;`

Fig. 9 is a broken underside-1 viewl ofthe forward portion of the frame or trigger-plate; and

Fig. l0 is a perspectivel View of the magazinelatch, detached.

The particular repeating firearm herein chosen for purposes of illustrating one embodiment of the present invention is of the gas-operatedselfloading type of the general character shown in my cri-pending application" Serial No. 4783058, led March 5, 1943. Thesaidfirearm includes, inthe main, a frame or trigger-platel I5, a cylindrically-contoured receiver' I6; a. barrel! l1', a stock I8' and a barrel-cover I9. The firearm-structure also includes a breech-bolt 201 and a boxmagazine generally designated by the reference character 2i.

The frame or trigger-plate |5- above referred to is mainly of plate-lil're formand is formed on its lower edge with an integral loop-like triggerguard 22 extending around a trigger 23 which latter controls the ring mechanism of the firearm in any suitable manner not requiring. detailed description herein. The said frame It',Y is rigidly secured tol the stock I8 in any suitable manner such, for instance, as by a bolt or stud 24 -while the said frame l5` and receiver I6 are detachably secured together in any suitable manner. In eect, the-frame or trigger-plate l5 and the receiver I`6 whenv united together, constitute what may be termed a frame-structure.

The barrel Il above referred to is rigidly coupled atV its rear end withl the forwardl end of the receiver I6 in a manner common in firearms and extends through a suitable passage or cavity in the forward portion of the stock I8 and through aA channel formed in the underside of the barrelcover I9.

The receiver H5V is generally of cylindrical form exteriorly and is provided in its interior with an axially extending passage q25in which the breechbolt 2U' operates. Immediately forwardly of the forward edge of the frame or trigger-plate l5, the receiver I6 is formed in its underside With a verticalmagazine-receiving passage 26 into which ..35 Fig. 2 is a broken horizontal sectional vievsr` normally projects the upper portion of the boxmagazine 2l before referred to.

The box-magazine 2l includes complemental corresponding side-walls 21-21, a front end-wall 28; a rear end-wall 29 and a bottom wall 30. As is shown particularly well in Fig. 2, the sidewalls 21-2 T are formed integral with the respective opposite side edges of the front end-wall 28 so that all of the said walls 2'1-21' and 28v may be conveniently produced by folding up sheet meta-l into substantially U-shaped form in cross section. Therear end of. each of the side-walls 2? 21 is bent inwardly toward the complemental side-Wall to provide one ofv two vertical couplingflangesv 3`|3 i. Each of the said coupling-flanges 3'l-3l is normally entered into the adjacent one of two vertical coupling-grooves 32-32. The said coupling-grooves 32-32 are respectively formed in the opposite side faces of the forward `portion ofthe frame or trigger-plate, l5 and respectively accommodate the coupling-Hanges 3'l-3l with a free sliding fit.

The rear end-wall 29 of' the box-magazine has its vertical center bent up to provide a hollow rib 33, the interior of which latter opens forwardly into the hollow interior of the box-magazine structure in which is accommodated. a plurality of cartridges 34. The respective, opposite side edges ofthe plate-like rear end-wall 29 are bent rearwardly and slightly-inclined inwardly to respectively provide anges 35-35 having their respective outer faces snugly fitting against and preferably brazed to the adjacent inner faces of the rear portion of the side-walls 21-21 of the box-magazine. The vertical rear edgesl of the flanges 35-35 of the rear end-wall 29 abut and assist in supporting the inturned couplingflanges 3I-3I formed at the rear of the sidewalls 21-21, as is shown in Fig. 2. The hollow rib 33 of the rear end-wall 29 is accommodated in a vertical forwardly-opening groove 36 formed in the forward edge of the frame or trigger-plate I5.

To the rear of its vertical groove 36, the forward portion of the frame or trigger-plate I is formed with a vertical guideway 31 in which vertically reciprocates the depending stem 38 of a vertically-reciprocating bolt-stop generally designated by the reference character 39.

The bolt-stop 39 above referred to includes a head 40 having a downwardly-facing surface 4| for purposes as will hereinafter appear.

stood in the art to stop the breech-bolt in its rearmost position when the box-magazine 2| is empty, and does not require further discussion save as will hereinafter appear.

The respective upper edges of the side-walls 2'I-2'I of the box-magazine ZI are bent inwardly toward each otherto respectively provide retaining-lips 42--42 which serve to limit the direct upward travel of the cartridges 34. Located below the cartridges 34 within the space in the boxmagazine 2| defined by its four walls 21-21, 28 and 29, is a cartridge-follower 43r (Fig. 4) of inverted U-shaped form in side elevation and pressed upwardly by a magazine-spring 44 resting at its lower end upon the bottom wall 30.

The cartridge-follower 43 is provided with a lifting-finger 45 projecting rearwardly from the said cartridge-follower into the hollow interior of the vertical rib 33 located centrallyof the rear end-wall 29 of the box-magazine 2|. As the cartridge-follower 43 moves upwardly following the sequential removal of cartridges from the upper end of the box-magazine, the said follower will ultimately reach its uppermost position when all cartridges have been removed from the boxmagazine and during the last portion of its movement, the lifting-finger 45 of the cartridge-follower v43 will engage with the downwardly-facing surface 4I of the bolt-stop 39 to thereby lift the said bolt-stop.- `The lifting of the bolt-stopy 39 as v just described will cause the same to interpose itself in the path of forward travel of the breechbolt 20, in a manner usual in repeating firearms.

Each of the coupling-anges 3 |-3I at the rear end of the box-magazine 2| is formed with one of two rearwardly opening latching notches 46-46 respectively receiving the adjacent one of two latchinglanges 41-41 forming a feature of a magazine-latch 48. The said magazine-latch 48 is preferably formed of sheet metal and is of U-shaped form in cross section, as is shown especially well in Fig. 10. The latching-flanges 41--41 of the magazine-latch 48 are bent outwardly along a forwardly-and-downwardly-inclined path from the respective upper side-walls of the sai-d magazine-latch and the entry of the said latching-ianges 41-4'! into the latchingnotches 46-46 of the box-magazine 2| serves to releasably retain the latter in connected relationship with the firearm-structure. The said magazine-latch 48 is mounted for swinging movement The said bolt-stop 39 functions in a manner well underupon a pivot-pin 49 extending transversely through the said magazine-latch and through the adjacent portion of the frame or trigger-plate I5 embraced by the said magazine-latch.

Interposed between the lower portion of the rear wall of the magazine-latch 48 and the adjacent portion of the frame I5, is a helical latchspring 5I). The latch-spring 50 just referred to serves to yieldingly urge the magazine-latch 48 to turn in a clockwise direction around the pivot. pin 49 so as to normally project the forward ends of the4 latching-flanges 41-41 into the' latchingnotches 4'6-46 in the box-magazine 2| The clockwise turning movement of the said magazine-latch 48 is limited by providing the latter at the upper edge of its rear wall with an upwardlyand-rearwardly-curved stop-iinger 5I engageable with the underside of the adjacent portion of the frame I5.

By providing the box-magazine 2| with coupling-anges 3I-3AI or their equivalent, the said box-magazine may be rigidly though releasably coupled to the rearm-structure by the entry of the said coupling-flanges' 3|-3I into couplinggrooves 32-32 or their equivalent.

By providing the box-magazine 2| or its equivalent with a hollow rib such as 33, not only is the said box-magazine stiiened and reinforced, but two vadditional advanta-ges are achieved inasmuch as the said rib 33 acts as a guard for the liftingfinger 45 and at the same time assists in stabilizing the box-magazine by its entry into the clearance-groove 36 in the forward portion of the frame I5.

'The invention may be carried out in other speciilc ways than those herein set forth without departing from the spirit and essential characteristics of the' invention, Iand 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 range of the appended claims are intend-Y ed to be embraced therein.

I claim:

1. A box-magazine for repeating firearms comprising: a vertical front end-Wall; a vertical rear end-wall; and two vertical complemental sidewalls; one of the said end-walls constituting a unit :physically-distinct from and non-integral with the said side-walls and embraced between the same, and both of the said end-walls being spaced from each other and the said side-walls being spaced from each other to provide a chamber for the accommodation of cartridges; each of the said complemental side-walls of the boxmagazine having a portion extending outwardly beyond the non-integral one of the said end-walls and the outwardly-extending portion of each of the said side-walls being provided with a vertically-extending coupling-portion projecting inwardly toward the coupling-portion of the complemental side-wall at a location spaced outwardly with respect to the said non-integral end-wall.

2. A box-magazine for repeating rearms comprising: a vertical front end-wall; a vertical rear end-wall; and two vertical complementa] sidewalls; one of the said end-walls constituting a unit physically-distinct from and non-integral with thel said side-walls and embraced between the same, and both of the said end-walls being spaced from each other and the said side-walls being spaced from each other to provide a chamber for the accommodation of cartridges; each of the said complemental side-walls of the box-maffazine having a portion extending outwardly beyond the non-integral one of the said end-walls and the outwardly-extending portion of each of the vsaid side-walls being provided with an integral vertically-extending coupling-flange bent inwardly toward the coupling-flange of the complemental side-wall at a location spaced outwardly with respect to the said non-integral end-wall.

3. A box-magazine for repeating Tlrearms comprising: a vertical front end-wall; a vertical rear end-wall; and two vertical complemental sidewalls; one of the said end-walls constitutinga unit physically-distinct from and non-integral with the said side-walls and embraced between the same, and both of the said end-walls being spaced from each other and the said side-walls being spaced from each other to provide a chamber for the accommodation of cartridges; each of the said complemental side-walls of the box-magazine having a portion extending outwardly beyond the non-integral one of the said end-walls and the outwardly-extending portion of each of the said side-walls being provided with a vertically-extending coupling-portion projecting toward the coupling-portion of the complemental sidewall at a location spaced outwardly with respect to the said non-integral end-wall; the said nonintegral end-wall of the box-magazine being provided with two outwardly-projecting reinforcingportions each extending outwardly therefrom toward one Vof the said coupling-portions and respectively adjacent to and in reinforcing relationship with the outwardly-extending portion of one of the said side-walls.

4. A box-magazine for repeating rearms comprising: a vertical front end-wall; a vertical rear end-wall; and two vertical complemental sidewalls; one of the said end-walls constituting a unit physically-distinct from and non-integral with the said side-walls and embraced between the same, and both of the said end-walls being spaced from each other and the said side-walls being spaced from each other to provide a chamber for the accommodation of cartridges; each of the said complemental side-walls of the box-magazine having a portion extending outwardly be- Iyond the non-integral one of the said end-walls and the outwardly-extending portion of each of the said side-walls being provided with an integral vertically-extending coupling-ange bent inwardly toward the coupling-ange of the complemental side-wall at a location spaced outwardly with respect to the said non-integral end-wall; the said non-integral end-wall being provided on each of its respective opposite sides with one of two integral reinforcing-anges extending toward the said vertical couplingflanges and respective- 1y in reinforcing relationship with the outwardlyextending portion of one of the said side-walls.

5. A box-magazine for repeating Lfirearms comprising: a vertical front end-wall; a Vertical rear end-wall; and two vertical complemental sidewalls; the said end-walls being spaced from each other and the said side-walls-being spaced from each other to provide a chamber for the accommodation of cartridges; one of the said end-walls being provided with a vertical outwardly-extending hollow rib for the accommodation of a movable interior member of the box-magazine; each of the said complemental side-walls of the boxmagazine having a portion extending outwardly beyond the end-wall provided with the said hollow rib and each of the outwardly-extending portions of the said side-walls being provided with a vertically-extending coupling-portion located outwardly with respect to the said hollow rib and projecting toward the coupling-portion of the complemental side wall.

6. A box-magazine for repeating firearms comprising: a vertical front end-wall; a vertical rear end-wall; and two vertical complemental sidewalls; the said end-walls being spaced from each othere and the said side-walls being spaced from each other to provide a chamber for the accommodation of cartridges; one of the said end-walls being provided with a vertical outwardly-extending hollow rib for the accommodation of a movable interior member of the box-magazine; each of the said complemental side-walls of the boxmagazine having a portion extending outwardly beyond the end-wall provided with the said hollow rib and the outwardly-extending portion of each of the said side-walls being provided with an integral vertically-extending coupling-flange bent toward the coupling-flange of the complemental side-wall and located outwardly with respect to the said hollow rib.

7. A box-magazine for repeating firearms comprising: a vertical frond end-wall; a vertical rear end-wall; and two vertical complemental side-walls; the said end-walls being spaced from each other and the said side-walls being spaced from each other to provide a chamber for the accommodation of cartridges; one .of the said end-walls being provided with a vertical outwardly-extending hollow rib for the accommodation of a movable interior member of the box-magazine; each of the said complemental side-walls of the box-magazine having a portion extending outy l wardly beyond the end-wall provided with the said hollow rib and the outwardly-extending portion of each of the` said side-walls being provided with a vertically-extending coupling-portion located outwardly with respect to the said hollow rib and projecting toward the coupling-portion of the complemental side-wall; the end-wall of the box-magazine having'the said hollow rib being provided on the respective opposite sides of the said rib with two outwardly-projecting reinforcing-portions each extending outwardly therefrom toward one of the said coupling-portions and respectvely adjacent to and in reinforcing relationship with the outwardly-extending portion of one of the said side-walls.

8. A box-magazine for repeating rearms comprising: a vertical front end-wall; a vertical rear end-Wall; and two vertical complemental sidewalls; the said end-wallsl being spaced from each other and the-said side-walls being spaced from each other to provide a chamber for the accommodation of cartridges; one of the said end-walls being provided with a vertical outwardly-extending hollow rib for the accommodation of a movable interior member of the box-magazine; each Aoi the said complemental side-walls of the boxma-gazine having a portion extending outwardly beyond the end-wall provided with the said hollow rib and the outwardly-extending portion of each of the said side-walls being provided with an integral vertically-extending coupling-ange bent toward the coupling-ange of the complemental side-wall and located outwardly with respect to the said hollow rib; the end-wall having the said hollow rib being provided on each of its respective sides with one ofv two integral reinforcing-anges extending toward the said vertical coupling-flanges and respectively in reinforcing relationship with the outwardly-extending portion of one of the said side-walls.

CARL G. ISWJEBILIUS.