US1740187A - Firearm - Google Patents

Description

Dec. 17, 1929. c. c. Loomis FIREARM Filed Dec. 14. 1926 Stream/eq# Patented Dec. 17, 1929 ED STATES PATENT oI-Fcn CRAWFORD C. LOOMIS, OF ILION, NEW YORK, .ASSIGNOR TO REMINGTON ARMS COM- PANY, IN C., A CORPORATION OF DELAWARE FIREARM Application led December 14, 1926. Serial No. 154,672.

This invention relates particularly to firearms of the type comprising a magazine adapted to contain a number of cartridges which are transferred one at a time to the firing chamber to be fired. In guns of this type the opening through which cartridges are transferred from the magazine to the chamber must be provided with cartridge stop devices which will retain the cartridges in the magazine when the chamber closing breech mechanism is retracted to open the chamber, thus permitting the shell case of the fired cartridge to be ejected without interference from the next cartridge to be transferred to the chamber. The means for transferring the cartridge from the magazine to the chamber is ordinarily associated with the breech block in such a way that the transfer of the cartridge takes place on the forward or breech closing movement of the breech block. The arrangement must be such that the cartridge stop is displaced at the proper time to permit such transfer of the cartridge.

The present invention contemplates an improved cartridge stop. For the purpose of illustration the invention has been shown as applied to a firearm of the type disclosed in the patent to Browning, #1,083,384, although it is to be understood that this application of the device is merely illustrative and not restrictive, the invention being applicable to other types of firearms as well.

In the drawings:

Fig. 1 is a fragmentary sectional elevation of a lirearm embodying the invention.

Fig. 2 is an enlarged inverted plant of the receiver with the breech mechanism removed.

Fig. 3 is a fragmentary transverse section, substantially on the line 3-3 of Fig. 1 illustrating the operation of transferring a cartridge to the chamber.

Fig. 4 is an assembly view of the improved' cartridge stop.

The firearm comprises a stock 5, suitably secured to a receiver 6 containing a breech block 7 adapted to close the end of the chamber 8, formed in the adjacent end of the barrel 9. rlhe breech block 7 contains the usual firing pin (not shown) controlled by the trigger 10. The cartridge containing maga-zine comprises a tube 11, extending into the receiver and containing the flexible magazine follower 12 and follower spring 13, which may be housed in the auxilliary tube 14. Tube 14 is held in the tube 11 by a bayonet joint connection comprising slot 15 and pin 16, and isreleased by manipulation of a finger piece 17 associated with the tube 14.

The end of the magazine tube 11 adjacent to the receiver is in alignmentwith a channel 18. extending longitudinally through the receiver.

The upper wall of the channel 18 curves downwardly at its forward end for the purpose of guiding the nose of the cartridge into the chamber. When the breech block is closed, the foremost cartridge in the magazine is supported in part by the top of the breech block. When the breech block is retracted the foremost cartridge is pressed forwardly by the force of the magazine spring communicated through the column of cartridges in the magazine and is depressed substantially to the position shown in Fig. 1, in which its head will be engaged by the breech block on its forward movement, and the cartridge moved into the magazine. Means are provided for temporarily restraining forward movement of the second cartridge in the magazine while the foremost cartridge is being transferred to the chamber, said means comprising the cartridge cut-olf member 20 having a laterally extending nose 21.- The cut-olf member 20 is adapted to be moved on the rearward movement .of the breech block to bring the nose 21 into the path of the cartridges in the channel 18 and to be restored to ineffective position as the breech block is closed. The mechanism for this purpose as well as other parts of the firearm which have been hereinbefore mentioned are more fully illustrated and described in the patent to Browning #1,083,384 above mentioned.

It is necessary to provide means for restraining the forward and downward movement of the foremost cartridge in the maga zine While the breech block is in retracted position. For this purpose, the present invention contemplates the provision of the cartridge stop device which will now be ydescribed. A

A transversegcartridge stop pin22 isifplaced in the"'side of the Wreceiver near the forwardl end of the channel 18V, and extends a short dist'ance into 'the channel 18. y l

prises a shoulder 23 Which l'both "limits 'its Said pin j'com- 1,740,187 Y i i said screW.

CRAWFORD C. LOOMISU movement into the channel and forms an. v ,K abutment for one end'of coiled spring`2`2lY which surrounds the pin.- Anapertu-redfscrew 25 in the receiver Wall receives the exterior .-endioftherpin{22,fthefaperture serving as a guide 'for :the pin fand fthe screw7 also 4for-ming k:1n-abutment orthe-spr-ing 24:` The pin is Y .i

thus f pressedfinwardlyf into the: channel 1-8 by sthespring .24,fand,-;engaging"the side ofthe Y Y 4foremost cartridge, prevents its movement out frcis-thehannel'l aslongfasfthefpin remains in sefectivejfposition. .Asthefbreech ,block moves `'forward thefflieadiofithe cartridgeis engaged by the face of'thefbreechblock, and under :the pressurefthusfexerted upon the cartridge pin -22 is depressed"against the action of its spring5 beingfcammed VVbackby its contact fwith fthe :cylindrical v-side foi? the cartridge "Whichfmoves.downwardly and forwardly past it. .Asfsoon fasxthecartridge has `leeensuficiently depressed to clear the pin 22 spring y n24: again restoresithe pini to efective=-positionr *cartridge v'2st/op is thus provided which,

lWhile unusually effective, is-ca-pablesof Ydis- :pla.cement :merely by the pressureysexert-ed 4upon' the cartrt-idrge by the :bre-ech block and -zdc'esnot'require special mechanismzfor eiec'tingitsdisplacement. .The construction? m0re over'issruggedsand simpler-the partsareeasily nand fcheaply :produced fand `are not readily susceptible toinjlury orzbrealra ge. It' will also he `notedtlrat.the'cartridge stopzdev-ice shown sin the patent Eto JrOWnin-g, above? mentioned, 'fcan be :replaced by .fthe cartridge -stop device 0f=this invention Without:alterationein any v'otherpalrts ofthemechanism. iT-'heiinvention -vis:not fto he considered :as limited to vthe prefcise constructionfshown and described since Zit .is lsusceptible of many 'modifi-cations ,all 'falling Within the -scope `of the .appended claim. v Y

iVhat' is claim'edzis In .ffirearm compri-sing a :chamber7 a receiver :and a fmagazine "adapted tto 'conta-'in 'cartridges @to be 'transferred one at f'a ytimeV throughthelreceiverLtorthechamberareci ro'catingfibreech*block 7in the receiver mov- 'Aable 'to yengage .fand Vitra'nsfer a 'cartridge ifrom 'the :receiver 'intosthe gchamber, :a

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