US904646A

US904646A - Automatic firearm.

Info

Publication number: US904646A
Application number: US42936308A
Authority: US
Inventors: Carl L H Prinke
Original assignee: Individual
Current assignee: Individual
Priority date: 1908-04-27
Filing date: 1908-04-27
Publication date: 1908-11-24
Anticipated expiration: 1925-11-24

Description

C- L. H. PRINKE.

AUTbMATIG FIREARM.

APPLIOATION FILED APR. 27. 1908.

904,646. I Patented Nov. 24, 1908.

2 SHEBTSSHEET 1.

G. L. H. PRINKE.

AUTOMATIC FIREARM.

APPLIGATION IILED APR. 27. 1908.

Patented Nov. 24, 1908.

2 SHEETS-SHEET 2.

Uni

. an'romarro Jr;

CARL L. H. 'PRINKE, or mmmonn, 'nanmnn.

' Specification or team Pater-rt.

rate

ratemea msv. as, 1

Application filed April 27, 19W..- Serial No. 9,863.

To all whom it may concern:

Be it known that I, CARL L. H. Pmn zn, a subject of the Emperor of Germany, residing in the city of Baltimore and State of permit the feed of a fresh cartridge. In

such arms a fresh load is usually inserted by the breech bolt which immediately moves forward after recoil and the cartridge is exploded by a firing pin carried by the breech bolt. A firearm of this class is shown in my U. S. Patent No. 875,209 of December 31, 1907, and iny'present invention involves certain improvements on this arm,'and it also involves some radically new features of construction and operation which will be hereinafter fully explained.

According to my resent invention the breech bolt, or as 1 ca 1 it, the firing bolt, is presssed forward by a spring and carries a rigid or integral firing pm. No extractor is employed and the ejector, while carried by, is movable independently of the firing bolt which latter, at the instant of firing, 18 engaged by the sear in such manner as. to resist the recoil, thus holding the breech. closed until the accumulated power of the gases of explosion is such as to not only forcibly ex.- pel the bullet, but to insure the proper recoil of the bolt. 1 have also provided apneumatic check for the recoil which may be used in connection with the check afforded by the engagement of the sear with the bolt, as aboveexplained, or it may be used independ ently thereof for a similar purpose.

The trigger and cocking mechanism differ materially from-that shown in my prior patent and the cartridge box or magazine is also improved and novel devices are em ployed for holding the magazine in feeding position.

'The improved arm is so constructed that the shock of recoil is'mainly conveyed directly from the receiver to the stock of the arm instead of to the stock by way of the magazine.

frame as hereto-fore and the assembling devices have also been changed. I have alsoprovided novel means for holding and guidmg the action spring and connecting it with the ejector, and a new way of mountin and operatingthe rear sight has been adde In the accompanying drawings,-.Figure 1 shows a vertical longitudinal section of the breech portion of an automaticfirearm embodying my improvements, some of the interior parts being shown in elevation and these parts are shown in the position they assume at the instant of firing. Fig. 2 is a similar view of the main Working parts of the arm in firin position. F i 3 shows a vertical longitu inal section wit some parts in elevation of a modified form of the mechanism where the firing bolt, which is in firing position, is held closer to the breech of the barrel and has partially inserted a cartridge in the cartridge chamber of the barrel. Fig. a shows a vertical lon itudinal section of the front end of the firing bolt. Fig. 5 shows a front elevation of the same. Fig. 6 is a lan view of the ejector and the front end or the action spring with which it is connected. Fi 7. is a rearview of the sear and the paw "which it carries. Fig.', 8 shows a side elevation of the receiver and certain parts connected therewith. Fig. 9 shows a side elevation of the frame, trigger guard, magazine, etc. Fig. 10 is a bottom plan view of the receiver and certainparts carried thereby. Fig. 11 is a top plan view of the frame and certain parts connected therewith. Figs. 12 and 13, are detail views of the rear sight of the barrel. Fig. 14: shows a transverse sectionon the line cd of Fig. 10. Fig. 15 shows a vertical lon itudinal section of the receiver with a mo ified form of actions 7 ring and guide. .Fig. 16 is a plan view 0 the cartridge box or The tubular receiver2 is connected with the barrel 1 by a threaded joint and is provided with a threaded socket 64 to receive the assemblin screw 51 which passes through a hoe 77in the front part of the frame. The frame 42 has a recess 53 to receive the boss 59 in which the socket 64..

is located, and it has a lug 43 formed. with a fiat top. and it enters a recess 66 formed in the front portion of the receiver in front of the boss 52. The barrel has a flattened part 65 in the front part of its with which the top of the lug 43 engages when the parts are locked together.

The parts are secured together by means of the assembling screw 51, in the manner indicated, a. 6., the assembling screw enters vertically through the front part of the frame and enga es the socket 64 of the receiver. When the parts are thus assembled the top of the lug 43 bears a ainst the flat ortion 65 of the barrel an prevents it from turning, and the lug 43 is held tightly in the recess or socket 66. In my prior patent the In 43 was received in ,a recess formed in t e forearm 54:, while I now form the lug-receiving recessor socket in the front part of the recelver.

j Instead of connecting the shank 41 of the butt stock with the frame, I now connect it directly with the receiver so that the shock of recoil may be transferred directly from the receiver to the stock instead of by way of the frame as heretofore. For this purpose the receiver is formed with a downwardly projecting arm 2* into which the shank 41 is screwed, as indicated'in Figs. 1 and 8. This arm 2 is-bifurcated, as indicated in Fig. 10, and the two members 67 fit over a tongue 71 at the rear end of the frame 42. The two members of the bifurcated portion of the arm 2, are formed-with threaded holes and the tongue 71 is formed with a registering unthreaded' hole 143. When the partsare brought together they are held firmly in place by an assemblingscrew 70. In this Way the receiver is connected to the frame by assembling screws both at the front and at the rear, but the shock of recoil is mainly transferred from the receiver directly to the butt stock. The barrel may be detached from the receiver when they are disconnected from the frame by merely loosening the assembling screw 51, and when the'barrel is removed the front end of the receiver is freely opened so that the firing bolt and other working parts associated therewith can be removed through the front of the receiver, thus enabling me to have a solid or integral rear end for the receiver.

.The breech bolt, or as I call it, the firing bolt, 3, is mounted to slide back and forth in the receiver in line with the barrel and it carries at its front end a fixed firing point or pin 31, which is centrally arranged, as shown in Fig. 5. The firing bolt is hollow, being formed with three

chambers

28, 29

1 and 29 of different diameters, the chamber 29 being made 'to extend through the front end of the bolt which latter is recessed at 30, and this chamber 29' is eccentrically located as shown in Fig. 5.

The action spring or firing spring 6has threaded portion,

'place by the its front end arranged in the rear chamber 28 of the firing bolt and it extends back to the rear end of the receiver over an action spring (guide 5 which has a conical head or rear en 36 arranged in a corresponding recess 63 in the rear wall of the receiver. The guide is loosely mounted in the receiver, can be easily removed therefrom, but is held in tension of the action spring. The front end of the spring 6 encircles the rear arm 57 of the Yejector 7, and bears against a collar 7 thereon, while the front endof the ejector extends into the chamber 29 and at times passes entirely through it. The conical end 36, :of the guide is pressed at all times firmly against the rear wall of the receiver and the spring tends to move the firing bolt towards the breech of the barrel.

The ejector 7 is guided in the chamber 29 and extends through the chamber 29, as above stated. When operating to eject a shell it projects beyond the front end of the firing bolt, but is at other times retracted by a relatively light spring 8 which is interposed between the front wall of the chamber 29 and the collar 7-of the ejector. The

in the position shown in Fig. 1 where the relative positions of the firing bolt and the ejector are shown as they appear at the moment of firing, while in Fig. 2, they are shown in the position they assume soon after firing, z. e., after recoil, when, it will be observed, the springs 6 and 8 are compressed and the ejector protrudes from the front of the firing bolt. It will be observed that the bolt is advanced by the combined pressures of both springs 6 and 8, and that both springs serve to brake therecoil. By causing the front coil of the spring 6 to bear against the ejector when the breech is closed, the ejector is prevented from falling out should the gun be held in a vertical position with its butt stock lowermost. The ejector being arranged eccentrically when it is pr0- truded, it will strike the rear end of the shell at one side of its axis causing the shell to be ejected in the manner hereinafter described. On its under side the firing bolt is formed with a recess and shoulder 26 with which the sear 9 engages to cock the arm, as shown in Fig. 2, and it is also formed with a recess and shoulder 27 adapted to engage with the sear as soon as the firing bolt has reached the limit of its forward movement and the arm is -fired. This is for the purpose of braking the recoil in the manner hereinafter described. A side opening32 is formed in the receiver through which extends a handle 69 which projects laterally through one side of the firing bolt, and by means of which the bolt may be retracted by hand if desired. This handle serves to prevent the bolt from turning and. serves also to retain the bolt in the receiver whenthe arm is taken apart. By detaching the handle from the firing bolt, the latter may be easily removed from the receiver.

The magazine or cartrid e box' 45 is closed at the bottom and on all si es, but is open at the top. The sides are formed of sheet metal and at the top of the magazine an overhanging forwardly projecting lip 61 is formed on the rear wall, and just in rout of this lip on opposite sides,'lips 73 are formed which prevent the rear end of the top cartridge from rising out of the magazine until it has been moved forward by the firing bol The upper edge of the front wall of the magazine is beveled or inclined at 60 for the purpose of elevating the front end of the top cartridge to facilitate its passage to the cartridge chamber a. The forwardly projecting lip 61 cotiperates with the inclined surface 60, in the following way: As the topmost cartridge in the magazine rises after the recoil of the firing bolt, it is held by the lip a little in advance of the others below it (big. 2) with its front end above the inclined surface 60, so that the tendenc of the front end of the cartridge to lower into the magazine is prevented. The front end of the cartridge under such circumstances will be received by the inclined surface and as the firing bolt moves forward the front end of the cartridge will rise on the incline and enter the cartridge chamber of the barrel. Were it not for this the front end of thecartridge might be depressed to such an extent in the magazine as to be caught in the front wall thereof. Lips 7d are formed on the upper edge of the sidewalls of the cartridgebox near its front end to prevent the front end of the cartridge from rising too high when feeding a cartridge into feeding position in front of the firing bolt. The magazine is detachably connected with the frame of the arm by means of a spring catch 21 pivoted near its middle portion at 20 and having a tooth 2.2 above its pivot arranged to engage either of two

recesses

62 or 62 in the rear wall of the magazine When the tooth engages the notch 62*, the magazine is held below its feeding position, but when the tooth engages the notch 62, the magazine is held in feeding position and will automatically feed cartridges to the receiver and hold them in position to be carried to the cartridge chamber of the barrel by the firing bolt.

The magazine spring 48 is of usual construction and operates in conjunction with a follower 49 which is similar in construction to that shown in my above mentioned patent, and operates in a similar way.

A lug 55 is formed on the front wall of the magazine or cartridge box nearits upper ,ded

end which is adapted. to engage a recess 55 in the frame 42 just below the boss 52'of the receiver. This serves to lock the front portion of the frame in place and in connection with the catch 21 firmly holdsthe magazine in place. It will be observed that the lug 55 extends into the recess 55 the lower wall thereof so that it supports the front portion of the magazine which cannot be moved straight. downwards. Immediately in rear of the cartridge box of the magazine there is a recess just in advance of the sear, ag shown in Fig. 1, so that when the catch 21 is released, the box can betilted sufiiciently to disengage the lug 55 from the recess 55 The sear 9- is pivoted to theframe at 10 below the bottom wall of the receiver and it is formed on its end with a lu 23 adapted to engage in the

notches

26 and 27 of the firing bolt. It opcrates through a suitable opening in the bottom of the receiver and its lug or tooth 23 is normally held in an I elevated position by means of a spring 14 carried by a pin 13 which bears against they catch 21, above its pivot and extends into an opening 15 in the lower portion of the scar and bears at its rear end against the pawl 11, which is pivoted to the sear at 12 by a ranged pivot pin.

The spring 14 serves the double purpose of pressing the catch into engagement with the cartridge box or magazine and of holding the sear ig engaging position. The pawl 11 is adapted to swing on its. pivot in a vertical plane. The spring 14 tends to hold the .pawl in the position shown in Fig. 1, as the spring presses against the upper. rear end of the pawl. The pawl 11 is adapted to coiiperate with the trigger 16 which is pivoted at 17 to the frame 42 and carries a spring 18 secured by a screw 19 to the trigger. and bearing against the rearwall of the frame chamber in which the trigger and the sear are located. The spring tends to hold the trigger in the position shown in Fig. 2 with its upper front end above the upper rear edge of the pawl 11 and rests on upper rear transversely arlOG" and when in this position if the trigger be pulled, the pawl 11 will be moved downwards carrying with it the sear which then separates from the firing bolt and permits the'latter to be shot forward by the force of the action spring. As soon as the firing bolt has reached the limit of its forward stroke the trigger will occupy the position shown in Fig. 1, its upper front end bearing against the rear face or edge of the pawl 11 and the lug 23 of the sear enters the recess 27 in the rear portion 'of the firing bolt, thus resisting the recoil of the firing bolt and affording a brake which, however, is overcome as-soon as the pressure of the gases has sufiiciently accumulated. As the firing bolt recoils, the

sear is depressed but again enters the notch 26 after the bolt has recoiled and moved forward a short distance. The pawl and tri ger cooperate in such manner as to ermlt these movements. The -firin bolt is also provided with a notch and s oulder 25 by means of which it may be held in its half .cocked position if desired. The firing bolt has an inclined surface 56 on itsunder side against which the sear bears as the bolt moves forward. This engagement of the sear with the bolt tends to check the speed of the bolt while advancing.

The rear end of the receiver is closed, bemg formed integrally with the main body thereof and on the rearend of'the receiver -into a recess 40 in the butt stock 39. The

sight is provided with a shoulder 75 just above its lower end. Preferably'the sight has a dove-tail connection '76, 78 with the rear end of the receiver, as shown in Fig. 15, and the rear face of the sight may oe serrated or roughened'to permit of its easy manipulation. It will be observed that the firing bolt fits the bore of the receiver closely while free to reciprocate therein. It is preferably reduced in diameter at 100 for the purpose of minimizing friction, leaving cylindrical bearing surfaces 101 which fit the bore of the receiver closely. The rear ortion of thereceiver isclosed air tight rom its extreme rear end up to the opening 102 in its bottom wall through which thesear 9 operates. It is clear, therefore, that when the firing bolt recoils, air is compressed in the rear portion X of the firing bolt chamber. During recoil the opening 29* in the front end of the firing boltis closed by the cartridge shell and remains so closed until the ejector operates to expel the shell. Therefore the operation is such that when the'firing bolt recoils, air is compressed in the firing bolt chamber of the receiver which acts to checkthe recoil and this check is relieved after the bolt has recoiled and the shell has been ejected. It will be understood that the ejector is loosely mounted in the

chambers

29 and 29, that is to say, the diameters of these chambers are greater than the diameters of the adjacent parts of the ejector so that there is a sufiicient space around the different parts of the ejector to allow air to pass out through the front end of the firing bolt when the front opening is not closed by the cartrid e shell The arm thus. descri d is entire y autosistance afforded by the interlocking. sear vancing to fire.

trigger to fire the entire charge of cartridges in the magazine. When the arm is in firing condition, as indicated in Fi 2, and the trigger is pulled, the firing bo t moves forward, engages the rear end of the top cartridge 50 in the magazine, first shoves it against the incline 60 and then .into the cartridge chamber a of the barrel. The lip 61 causes the top cartridge to move slightly forward before it is struck by thebolt. As the bolt moves forward after en agin the cartridge the latter centers itse f in %ine with the axis of the barrel and immediately after the al al-tridge is thus inserted it is fired by the further advance of the bolt. Just before the cartridge is-fired, however, or at that instant, the lug 23 on the sear engages the firing bolt at the recess and shoulder 27, as indicated in Fig. 1. developed by the explosion overcomes the rewhich lowers out of the way and the It is retracted to its. cocked position and is immediatelyengaged by the sear, while the empty shell at the same time is expelled into the receiver, its rear end remaining in' the chamber 30, and the ejector 7 advances from the front of the firing bolt, strikes the shell eccentrically and expels it through the open-' ing 32 at the side of the receiver. A cartridge then rises to the top of the ma azme The forceof the gases.

into position in front of the lip 61 to e engaged by the firing bolt on its next forward movement. While being recoiled the air is compressed in the rear portion of the receiver in the manner above described, thus checking the recoil and very materially dininishing the shock incident thereto. The :ir pressure is relieved when the shell is exoelled in the manner before stated. I prefer to use the pneumatic check, above menti-oned, in connection with the check provided by the engagement of the sear as pecified, but I may use either of these checks separately or combined as desired.

It is sometimes desirable that the firing bolt should have a shortertravel when adhe construction shown in Fig. 3, where, it will be observed, the cocking recess and houlder 26-are arranged further-back on he firing bolt and the cartridge is part way inserted into the cartridge chamber a. The bolt may recoil tothe same extent but moved forward to a greater extent, inserting the cartridge, in the manner indicated before being arrested before the complete lnsertlon of the cartridge or the firing thereof. Otherwise the construction shown in Fig. 3 is substantially the same as that shown in Fig. 1. n Fig. 3 the parts are shown in firing position.

In Fig. 15 I have shown a modified way This I may accomplish by- 1 era .5 rear wall of the receiver an hold while making adjustment.

coerce of arranging the action spring and guide.

Fi s. 12 and 13. 38 indicates the cap, hole and the sight is prcferablyserrate as indicated, for the purpose of afiording a finger The spring 15 a4 is made heavier. and stronger than the spring 6, and it enters a recess or a chamber 29 in the rear portion of the guide 5. The arrangement is such that the guide 5 is held in an advanced position by the spring 34 so 2o that the cartridge shell is'ejected immediately after it leaves the barrel. As the spring 34 is stron er than the action spring *6, the guide 5 is he d in an advanced osition until the firing bolt strikes the gui e. The

2: backward movement of the firing bolt is then first resisted by the action spring 6, and later by the stronger supplementary spring as. By this arrangement the force of the recoil is broken gradually and the bolt 3t strikes softly against the rear wall of the. re-

- magazine, loosening the assembling screw ceiver.

The arm ma conveniently be used as a. single loader, i desired, cartridges being inserted through the opening 32.

. lhe arm 1s easily cleaned and there are few parts and these are largely loose and readily detached. The firing bolt, the action spring, the action spring guide, the

Y ejector, its spring, the sear s ring 14, and the 1' pin 13 are all loose and can e readily taken out and cleaned. The. barrel can be detached from the receiver and the firing bolt and the parts associated therewith can all be easily withdrawn through the front end of the receiver. This is done by detaching the and unscrewing the barrel. The frame can then, if desired, be removed from the stock and receiver by withdrawing the assembling screw 70.

I claim as my invention 1. A firearm comprising a reciprocating breech bolt and a pneumatic check for the breech bolt which is provided with an escape for the compressed fluid which is closed during the first part of recoil but which is opened automatically to permit the escape of the fluid before the arm is cocked.

2. An automatic firearm in which the firin bolt recoils by the pressure of gases detomatically opened before the arm is cocked.

ormed in the manner indicated. in

3. An automatic firearm in which the firing bolt recoils. by. the ressure. of gases. deve oped. immediately a ter fir and which is. provided with a. neumatic c eck for the firing bolt arran e in thev receiver, which acts direetl' on-t e. bolt and has an escape for the ilui which is closed during the first part of recoil but which. is automatically openedbetorethe arm.v cocked. 4. An automatic firearm comprising a receiver, a firing bolt reciprocatin t ercin, means for. cocking the bolt, an a pneumatic check acting upon the firingbolt which is provided with an. escape for the fluid closed during the first part of recoil but automatically opened before the arm is.

cooked.

5. An automatic firearm compnslng a receiver, a reci rocating firing bolt, an ejector carried there .37 but liaving movement independent thereof, a pneumatic check for the firing bolt having an air escape closed during the first part of recoil by the cartridge shell, and means. for operating the ejector to expel the shell and to relieve the pneumatic check.

6. A firearm in which the firing bolt. reciprocates in areceiver and is provided with a pneumatic check for the firing bolt having an air escape opening closed immediatclg' after firing by the cartridge shell, but opene when the cartridge shell is ejected.

'7. An automatic firearm comprising a. re-

ceiver, a reciprocating firing bolt, an ejector carried thereby and mounted to move through an opening in the front end of the bolt,.which opening is closed during recoil.

by the shell of the exploded cartridge, a I

pneumatic check for the firing bolt communieating with the opening in the front end of the bolt, and means for operating the ejector to expel the cartridge shell and. to thus relieve the pneumatic check on the. bolt.

, 8. An automatic firearm comprising a re.- ceiver, a chambered firing bolt reci rocating therein, an ejector carried by, but aving a movement independent of, the firin bolt and which extends through an opemng in the front end of the firing bolt which opening communicates through the firing bolt with the firing bolt. chamber of the receiver, and means for operating the ejector to expel a cartridge shell and to thus open communication between the opening in the front end of the firing bolt and the rear portion of the firing bolt chamber of the receiver.

9. An automatic firearm comprising a, receiver, a firing bolt reciprocating therein and provided with a cooking recess, a scar operating through an opening in the bottom wall of the receiver to engage the cocking recess of the bolt, an air chamber in the re ceiver in rear of the opening in the receiver an. air escape o ening for the pneumatic check which is c osed during-the first part ,of recoil, and means for openlng the a r escape opening before the arm is cocked.

10. An automatic firearm comprisingla reci roca'ting firin bolt, 9. 10 in' evice which temporari y holds the: bo t immediately after firing but which thereafter withdraws to allow the bolt torecoil, and

a spring for movin said locking device into engagement with t e bolt.

11. An automatic firearm mwhich the fir" ing bolt is free to recoil by the pressure of sea developed immediately after firing, a ocking device engaging the firing bolt at the moment of firing and holding it until the pressure of accumulated gases is sufiicient to overcome its resistance to the recoil of the bolt, and a spring for movin the locktemporarily arrest the recoil, and an action spring for movin the, bolt forward.

.14. An automatic firearm in which the reciprocating firing bolt, a pneumatic check acting directly thereon, a locking device engaging the firing bolt at the moment of firmg and temporarily arresting the recoil of the bolt, and a spring for moving the locking device into engagement with the bolt.

15. An automatic firearm comprising a reciprocating firing bolt, a receiver in which it operates, a pneumatic check in the receiver actin directly upon the firing bolt and whic is rovlded with an air escape open ing, whic is closed durin the first part of recoil but is automatical y opened as the bolt recoils, a sear adapted to engage the bolt to hold it in its cocked position and also to engage the bolt at the moment of firing to temporarily arrest the recoil, and a spring for moving the sear into engagement with the bolt.

16. An automatic firearm comprising a reciprocating firing. bolt formed with three notches for the engagement of the sear with one of which the sear engages to hold the bolt in firing position, with another of which it engages to hold the bolt in half cocked positlon, and with the third of which it engages when the bolt is in its forward position atthe time offiring.

17. In an automatic firearm the combination of a reci rocating firing bolt having a recess in its ont end to receive the rear carried trigger and a spring acting on the pawl and also on the catch.

- boss enterin end of the cartridge and formed with an in-' tegral firing point, an eccentrically arranged ejector carried by the firing bolt and ada t-' ed to engage the rear end of the cartri ge shell eccentrically of its axis, and means for holdingthe firing bolt in its forward position after firing until the gas pressure causes the bolt to recoil, the empty shell being forced from the barrel without an extractor b the force of the explosion gases into position to be expelled from the receiver by the ejector, substantially as described.

18. In an automatic firearm the combination of a reciprocating firing bolt, a receiver tridge, a vertical wall formed with an inclined u per edge arranged close to and leading irectly to the cartridge chamber of the barrel below said lips, and a rearwall formed with a forwardly projecting lip which as the cartridge rises in the box causes the topmost cartridge to move forward and assume a position in line with the lower por- I tion of the firing bolt with its front end above but close to the inclined surface of the front wall of the box. v

20. The combination with a reciprocating firing bolt, of a cartridge box, a catch ada t ed to engage with the rear portion thereo a sear atla ted to engage the ring bolt, apawl y the sear adapted to engage the 21. The combination of the frame having a recess 1n its u per front portlon and a lug in front of sa1 recess, a receiver hav1n a recess receiving the lug on the frame, and an assembling screw for connecting the parts.

22. An automatic firearm comprising a reciprocatin firing bolt provided with an inclined un er surface, a scar adapted to bear against'such inclined surface to retard the movement of the bolt,v and a s rin for pressing the sear into the path 0 sai inclined surface.

23. The combination ofthe frame of the arm, the butt stock, its shank, the receiver connected at its front end to the frame, and an arm on the rear portion of the receiver connected directly with the shank of the butt stock. 24. The combination of the frame, the receiver, the butt stock, an assembling screw connecting the front portion of the frame with the receiver, an arm on the rear end of the recess in the frame an i a eoeeee I 7 the receiver and an assembling screw for bifurcated arm and an assembling screw for connecting this arm with the butt stock. connecting the parts. 10 25. The combination of the frame, the re- In testimony whereof, I have hereunto ceiver having an interlocking connection subscribed my name.

with the frame at its front end, an assem- CARL L. H. PRINKE.

bling screw therefor, the butt stock a bifnr- .Witnesses:

cate arm projecting downwardly from the SAMUEL-J. FISHER,

receiver, a, tongue on the frame engaging the Joe. W. SELBY.