US1041410A - Cartridge-case extractor. - Google Patents

Description

L. V, BENT c H. A. MERGI.`

CARTRIDGE CASE EXTRACTOE. APPLICATION FILED MAR-19, 1912.

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L. V. BENBT' @L H. A. MERGE. CARTRIDGE CASE EXTRAGTOR. APPLIUATION IELLD MAR. 19, 1912.

1,041,421. 0. Patented oct. 15, 1912.

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tion through LAURENCE 'VINCENT BNT AND HENRI ALBERT JIEBCI, OF ABIS, FRANCE.

cnn'rninGE-casn nx'rnnciron.

Specification of Letters Eatent.

Patented To al? whom t may concern Be it lrnown that we, LAURENCE VINCENT Benn and 'HENRI .ALBERT .li/lancio, citizens ot the United States and France, respectively, residing in Paris, in the Republic of France, have invented certain new and useful improvements in Cartridge-Case Extractors; and we do hereby declare the tollowing to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the saine.

@ur present invention relates to improvements in apparatus for positively and etticientlyextracting the empty cartridge case after the piece has ing the same laterally from the piece. is especially adapted for use in breechloading small arms or machine guns, in which the br'eech block has a rectilinear movement in the receiver.

rlfhe object of this invention is to provide for use in arms of the classes specified, and others, an extractor which will with certainty extract spent cartridge cases from the chamber ot the firearm, that it inay'be readily and cheaply manufactured, and that it may e assembled and disrnounted from the breech block of the arin with facility, without previously disxnounting the breech block or other component parts of the mechanism.

in the annexed drawings, the extractor is shown as applied to the breechl bloclr of the Bent-Merci automatic machine ride, subject oit United States Patent No. 861,939, issued July 30, 1907 and entitled Gas operated guns.

Figure l shows a central horizontal secthe barrel, the breech block, and receiver, parts being shown in plan, and the breech block being shown in the closed, and the ring pin in the forward position, the parts or the apparatus notessential to the description of the invention being omitted, for the salte of clearness in the drawings. Fig. 2 is a similar view,

showing the breech block about midway of its forward movement, and the firing pin in l clearly in l 3 I` hanging lips hold the spring against dropthe withdrawn or cocked position. Fig. shows acentral the forward end of the breech block, seen from beneath, and Vshows the emplacement of the improved extractor. Fig. 4; is

a side elevation of the forward end o'f the the left of Figs.

breech block, as seen from been tired, and for eject i l l l i l 'l l 1 l l E i engage the interrupted has4 interrupted screw-threads c,

the inwardly projecting 1 and 2, and as seen from the top otlig. 8. Fig. 5 is a front elevation ot the breech block. F ig. 6 shows a section through the breech block, along the line 6--6 ot liig. 3, and looking in the direction of the arrows. Fig. 7 is an inverted plan view or' the extractor, parts being broken away. Fig. S

is al side elevation of the extractor as detached. Fig. 9 is a front view of the exa section across tractor, and Eig. l0 shows along the line the body of the extractor, iO-l0 of .F ig. 7.

Referring to theparts generally, jr represents the receiver, in which the breech 'mechanism and barrel are mounted; B

represents the barrel; C represents the ferineture nut; D represents the breech block; lil the extractor; G the extractor spring; and H the ejector. The fermeture nut U adapted to screw-threads d on the reciprocating breech block; and this terineture nut is turned in. the manner described in our patent aforesaid. The means for reciprocating the breech bloclr, for rotating the fermeture nut, and i'or operating the firing pin, not being a part or' our 'resent invention, will not be further descri ed.

The breech block D is provided at one side with a longitudinal slot all, to receive ejector, and on the opposite side is provided with a recess d',

-orrningan'eniplacernent `for the extractor.

rhis .recess is open to one side of the breech V block, as shown most clearly in Figs. 2 and horizontal section through ping out, and yet `the enlargement d2 there is.

s. The recess d is enlarged as at cl2, to receive the extractor spring G, and in rear oi' preferably a small indentation d3, into which nts loosely the-tail end e3 of the extractor. The extractor is provided with av shoulder ef, to form an annular bearing for the extractor spring G, which normally tends to push the extractor forward, as will be hereinafter described. This extractor spring G projects into the recess at the rear end of the spring chamber (Z2, which is only partly closed by the overhanging lips de, as shown most Figs. 2, 4, and ti. These overperniit access to the rear as l coils of the spring, to facilitate the dismonnting or the extractor, as will be hereinafter described.

' On the front of the breech block is formed a protuberance D', through which is worked (Z0, `idapted to receive the forward end of the extractor. At the outer side of this passage, there is a plane :tace alt, adapted to engage the plane tace et of the extractor head opposite the claw there is Van inclined or wedge face (Z5, adapted to engage. the wedge face e5 of the extractor. For conveniente or" manipulation, and to insure lightness, the body portion ot the' ex tractor is cut away, es at ea.

It will be noted that' the emplacement for the extractor is open laterally through .the major portion of its length, as shown most clearly in Figs. 2 end 4.

On the opposite side ot the breech block troni the recessA for the extractor, is the groove d?, into which projects the shouldered end it of the ejector H, which is pret-y erably in the torni ot a sprino plunger, whose stein 7i." projects through the hollow sleeve screwed into the bushing K. The ejector id is normally thrust inwardly by the spring L.

The action of the extracting and ejecting mechanism is as ollowsz-n the Benetltlercie automatic machine ritie (as described in U. S. Patent No. 861,939 aforesaid), to which it is shown as applied by way ot illustrfition, the breech block has rectilinear motion only when opening and closing the breech in the forward motion of the breech block, the latter pushes a car! tridge previously held in a loading clip or packet of well known construction, from said clip or packet into the chamber of the barrel. The inclined front surface of the eirtractorclaw strikes the head ot the cartridge, causing the extractor to be pushed to the rear, and compressing the extractor spring r, the extractor claw being wedged from the axis of the gun until the claw can pass over the rini of the cartridge, or over the head in the case of a cannelured cartridge. Once the claw passes over the head of the cartridge or in line of 'the cannelure, the extractor spring forces the ei. rzxctor to the front, bringing' the claw in line -ith the cannelure, or to the front of the cartridge lrin. The wedge face (Z5, acting against the wedge tace e5, causes the extractor, under the inuence ot the spring, fully to engage with the cannelure, or in front of the rim of the cartridge case, as shown in Fig. l. On the discharge of the gun, the breech block is retracted in the present case by the gas operated motor piston, fully described in our patentaforesaid. In its rearward motion, the resistance of the cartridge case rlids the' extractor spring, by further exerting a longitudinal forward stress upon the extractor, end through the action of the wedge faces s and c5 tends further to torce the extractor p claw toward the longitudinal axis of the cern rear of this,

the usual way, as by hand, or inA the cartridge case itself.

Vthe last two spirals `through the resistance ot the cartridge case,

tends'to draw tne extractor toward theY front. of the breech block. The extractor, therefore, bears, first thiough its claw upon The second bearing is between the two inclined planes (Z5 and c5, and by reaction there is further bea-ring of the annular guide e2 against' the inner wall or" the recess d on the breech block. The breech block continuing its rearward inotion extracts the cartridge from the chamber, and holds it positively until the heed of the cartridge strikes 'the ejectoril', when through its own momentum it is ejected to the left-through the ejection opening in the receiver" of the gun.

lThrough the above construction, the shock produced by the violent contact between the head of the cartridge and the ejector has no destructive eitect upon the extractor claw, tor the reason that when struck by the ejector the cartridge case pivots about that portion of its head lying between the extractor claw and the face of the breech block, andstriking the wedge front face ot' the extractor claw, causes the extractor to more slightly .toward the rear, thereby relieving the pressure between the inclined surfaces Z5 and e5.

To disinount the extractor from the gun, the breech may be opened, when the extractor will be exposed through the ejection opening in the receiver ofthe gun. A spent cartridge case may thenbe engaged between tractor spring. This may be compressed to the front and disengaged from beneath the lips Z0 inthe breech block. The tail e3 of the extractor may now be pivoted outward, and the extractor withdrawn.

To remount the extractor, the extractor spring is rst. slid over the extractor tail.

rihe extractor claw is passed through theV passage do until brought up through contact of the wedge face e5 with the wedge face alf. r'he extractor spring is now coinpressed by means of inserting the head of a spent cartridge case between the two last spirals of the extractor spring, when the extractor spring and tail of the extractor may be swung inward until the former engages in the recess beneath the lips d,

While the above description applies to an extractor mounted on. breech bllr having to the rear of the cir-- only motion oit translation, it is evident that tion of a reciprocating breech blootL pro- 5 it may equally well be applied to breech vided with an ejector groove in one side blocks having motion first of rotation and thereoii, and a laterally open recess tor the then of translation. It will also be obvious extractor in the opposite side, through which that various modications might be made in the extractor may be readily removed, said the location of the extractor, and in the conbreech bloclr being also 'provided with a 55 struction, combination, and arrangement ot transverse shoulder closing the orward porthe various parts, which could be used Withtion ot the lateral recess, said shoulder havout departing from the spirit of our invening a wedge facey projecting into said extion. tractor recess, a. spring impressed ejector Having thus described our invention,what projecting into said ejector groove, an exe we claim and desire to secure by Letters tractor mounted in said extractor recess and Patent of the United States is provided with a wedge face engaging said l. ln, a magazine tire-arm, the combina- Wedge tace on the breech block, and with tion of a reciprocating breech block proa claw oppositely disposed to said wedge vided with a laterally open recess for the ace,.and a coil-shaped extractor spring also 65 extractor, through which the extractor may mounted in said laterally open recess and befreadily removed, and ,with a transverse surrounding the heel of said extractor and shoulder closingthe forward portion of the normally pressing said extractor toward saidlater'al recess, said shoulder having a wedge Wedge face, substantially as described., tacef4 `projecting into said extractor recess, t. ln a magazine-lire-arm, the combina- 70 an extractor mounted in said extractor retion of a reciprocating breeclr block process and provided with a wedge face envided Withan ejector 'groove i one side gaglng said wedge facev on the breech bloclt, thereof and with a Ylaterally open recess 'for and with a claw oppositelydisposed to said the extractor in the opposite side, through wedge tace, and a coilhaped extractor which the extractor may be readily removed, 75 spring also mounted in said laterally open and a transverse shoulder closing the torrecess and normally pressing said extractor Ward portion of the lateral recess,said shoul toward said wedge tace on the breech block, der having a Wedge face projecting into said substantially as described. f extractor recess, an ejector projecting into Q ,lnA a magazine lire-arm, the combin'asaid ejector' groove, an extractor mounted so' tion ot a reciprocating breech block proin said extractor recess and provided with a vided with a laterally open recess for the Wedge tace engaging said wedge'tace on the extractor, through which the extractor may breech block, and with a claw oppositely be readily removed, and with a transverse disposed to said Wedge tace, and with a shoulder closing the forward portion of the reduced tail, and a coil-shaped extractor 85 lateral recess, said shoulder having a wedge spring also mounted in said laterally open tace projecting into said extractor recess, an recess and inclosing said tail, and normally extractor mounted in said extractor recess pressing said extractor toward said wedge and provided with a wedge face engaging face on thejbreech block, substantially as said wedge face on the breech block, and described. o with a claw oppositely disposed to said ln testimony whereof, We ax our signawedge face, and with a reducedtail, and a tures, in presence of two witnesses.

coil-shaped extractor spring inclosing said LAURENCE VNCENT REN@ tail, said spring being also mountedin said HENRX ALBERT MERPT laterallyY open recess and normally pressing A said extractor toward said wedge face on the Witnessesz breech block, substantially as described. j J. A. CHOUINARD,

3. In a magazine tire-arm, the combina- E. Lavrrmr.

Copies of this patent may be obtained for five cents each, by addressing the commissioner or Washington, D. C.

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