US441673A - Hungary - Google Patents

Description

2 A K N R K K o@ S STRAIGHT PULL BRBBGHLOADING GUN. No. 441,673.

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s. xv K. KRNKA. STRAIGHT PULL BREBGH LUADING GUN.

No. 441,673. Patented Dec. 2, 1890.

Inventum 6/ L v5.5 rE/e KEN/m,

KA RL KEA/KA By Le' ./ltrlzg/ UNITED STATES PATENT OFFICE.

SILVESTER KRNKA AND KARL KRNKA, OF MIOHLE, NEAR PRAGUE, AUSTRIA- HUN GARY, ASSIGNORS TO THE KRNKA REPEATING RIFLE COMPANY, LUV

ITED, OF LONDON, ENGLAND.

STRAIGHT-PULL BREECH-LOADINGGUN.

` SPECIFICATION forming part of Letters Patent No. 441,673, dated December 2k, 1,890. l Application led February 13,1889. Serial No. 299,789. (No model.)

To all whom t may concern.-

Be it known that we, SILvEsTER KRNKA and KARL KRNKA, both residents ot` Michle, near Prague, Bohemia, Austria-Hungary, and

5 and subjects of His Majesty the Emperor of Austria-Hungary, King of Bohemia, have invented an Improvement in Fire -Arms, of which the following is a specification.

This invention relates to that class of magaro zine fire-arms in which a breech-bolt adapted to be reciprocated endwise for opening and closing the breech is combined with a magazine located underneath the said breech-bolt and feeding the cartridges through a slot in i 5 -the receiver.

The invention consists of improvements upon our magazine lire-arm as patented to us in the United States under No. 386,638,1)earing issue date the 24th of July, 1888, and is 2o designed to give greater strengthto the breechbolt by double breech-ribs or locking-lugs, to simplify the means for guiding the cartridges from the magazine into the chamber in the barrel, to provide an automatic spring-flap 25 closer to the receiver brought into operation by the lowering of the magazine for singlehand loading, to provide further facilities for taking the weapon to pieces without the aid of anytool, and to enable the magazines to be 3o filled with cartridges while either connected to or separated from the weapon.

` In the annexed drawings, Figure l is a sectional side elevation of a rifle constructed according to the invention, the breech being closed and the magazine suspended from the receiver. Fig.2 is a cross-section of Fig. 4. Fig. 3 is a cross-section through the receiver. Fig. fl is a sectional side elevation of the ride, the breech being open and the magazine just undergoing loading with cartridges. Fig. 5 is a top side View of the breech-bolt. Fig. 6 is a sectional side elevation of the breech-bolt, the lock being cocked. Fig. 7 isa perspective view of the ring-pin. Fig. S illustrates the manner in which an empty cartridge-shell isl ejected. Fig. 0 shows the device for stopping the breech-bolt when the magazine is exhausted. Fig. lO is a top view of the magazine. Fig. ll shows in detail the spring-aps applied to the receiving-slot. Figs. l2, l2, and 12b show a sectional elevation and a transverse section of a modified magazine for flanged cartridges and a plan of the follower, respectively.

The magazine-rifle shown by the drawings is of the eight-millimeter bore, and as its general construction is the same as described in thespecication of our 'United States Letters Pat-ent No. 386,638, bearing issue date the 24th ot' July, 1388, the same letters ot reference as in the said patent specification are used for the sake of easy comparison.

The straight-pull handle A projects from a socket a, loose on a cylindrical portion b of the breech-bolt B at its rear end, and thelatter is provided with a helical slot b' into which a stud-pin a within the ocket a projects to coact with said slot for turning the bolt by the straight pull.

In order to give the breech-bolt B greater strength, and thus to obtain a more secure closure of the breech, the front end of the said bolt is provided with two ribs b2, (see Fig. 5,) which are respectively engaged with matching shoulders at the front ends of ways e by the forward movement of the handle A.

An arm g4, Figs. 6 and 8, projecting from the catch, sear, or stud g and workingin the longitudinal slot b3 ot the breech-bolt, into which projects the catch or sear g, acts as a cartridge-ej ector, protrudingvhen the breech is wholly open, through a narrow extension of the slot b3 a sufiicient amount beyond the front end of the breech-bolt, so that the empty cartridge-shell extracted and held by the cartridge-extractor fis ejected in consequence of its impinging against the arm g4.

For the purpose of enabling the breech-bolt more securely to seize the iiange or rim of the uppermost of the cart-ridges of the magazine, the said bolt has its front end provided with a downward-extending projection b4, Fig. 8, which penetrates between the elastic cheeks 7L h of the magazine. In order to locate the said breech-bolt ribs b2 near the front end of the bolt and to allow the magazine to be loaded in the manner hereinafter described while connect-ed to the rifle, thc improved rcceiver or breech-casing E is shaped as shown in Figs. l to 4. The lug c3 of the breech-bolt screw C is enlarged, and the closed rear end of the screw C contains a guide-bore for the firing-pin D. A better support and guide for the cartridge when placed in position (when the weaponis being used as ahand breechloader or single-loader) is afforded by making the spring-naps J J, Figs. 3, 4, and ll, so long as to extend over the whole length of the lower opening` of the receiver E. Vhen the weapon is used as a repeater, the upper mouth of the magazine forces open the said flaps, which are thus pressed out of the way. Vhen it is desired to use the weapon as a single hand-loader, the magazine is lowered from its lowest to its highest notch 71.4, and the spring-naps close over the magazine and present a convenient rest for ahand-loaded cartridge. These flaps J J are made integral with a spring j, forming an inclined surface, along which thecartridges are pushed by the breech-bolt from the magazine or from the position in which they are placed by hand above the magazine into the chamber of the barrel. The spring j is somewhat depressed When the breech-bolt passes over it, and the hollowbeneah the said spring serves as a depository for the grease into which the projectiles (or cartridges) have been dipped, and which is partly scraped off in the act of loading. The spring-fiapsJ J are held in the receiver E by studs 7"j2 t7'3 (stud j not being visible in Fig. ll) engaging in corresponding holes. Vhen it is desired to entirely eject the magazine, the said springflaps materially aid its ejection as they close down. When the spring-naps J J are pressed together, the lateral studs 7" l7'2'are withdrawn from their holes in the lateral sides of the receiver, and the iaps may so be removed from the receiver.

In order to enable the rifle to be rapidly taken to pieces without the aid of any tool, the following arrangements are made: The breech-screw q, Figs. 1 and 4, is provided with a movable ring or stirrup q, which serves as a handle, and is folded down toward the receiver E on the breech-screw, having been screwed home, or a fixed cross-handle will serve the same purpose. Vhen the breech-screw is removed, the spring triggerguard I, which is likewise held by this screw, can be unhooked at the same time as the trigger-spring g by swinging it forward toward the lower aperture of the receiver. Afterward the butt or stock is withdrawn.

l-Iereit may be mentioned that the displacements of the front end of the spring triggerguard I, which are necessary when a magazine is inserted or ejected, are limited in the forward direction by a pin i', Fig. l, working in grooves, and in the rearward direction by a shoulder of the receiver.

To remove the `trigger G, the same is first somewhat drawn back and afterward swung downward and forward, whereby open-ended slots g2 g3 therein are caused to separate from the trigger-pivot and the jointiug-pin of the catch, sear, or stud g, and this latter can afterward be drawn out from below.

For taking the percussion-lock of the breech-bolt to pieces, the breech-bolt is first withdrawn from the receiver and the handlesocket a pushed backward to the rear end of the slot b. Next the breech-bolt screw C is unscrewed, when the handle-socket a, coiled spring d', firing-pin D, and bar F can be separated from the breech-bolt.

A particular feature of the ride lies in the arrangement of parts such that even when the trigger G is pulled back so far as to touch the trigger-guard l the catch, sear, or stud g will not be lowered in such a measure as to allow the breech-bolt to be withdrawn out of the receiver, this only becoming possible by partly unscrewing the breech-screw q. and afterward lowering the trigger-guard I, when the catch, sear, or stud g can be drawn out of the longitudinal slot b3 of the breech-bolt. The purpose of this arrangement is to completely guard against the accidental separation of the breech-bolt when the user is rapidly handling the breech-action.

In the weapon illustrated by the drawings the magazine shown in Figs. l, l2, and 12L is of such a size as to hold ten flanged cartridges 4of small diameter, and in Figs. 2 and 4 the magazine is shown containing twenty unflan ged cartridges, and along the rear edge of its lateral side the said magazine is pro- 'vided with a numbered sc ale, on which the cartridge-carrier 71,5 of the magazine-spring indicates the nu mber of cartridges yet in store.

As clearly shown in Fig. 9, the rear end of the uppermost convolution of the magazinespring h, which feeds up the cartridges, (or the rear end of the cartridge-carrier h5, which may be secured to the said spring and then immediately supports the cartridges,) is provided with an upright projection h6. Thus after the last cartridge of the magazine has been fired, if the user pulls back the breechbolt, the projection 716 rises into the path of the breech-bolt and prevents the same from. being thrust forward again, thereby apprising the user that the magazine is exhausted.

When it is desired to convert the gun from repeating ring from the magazine into hand single-loading, the magazine is lowered by gently pulling back the spring trigger-guard I and thus disengaging the detent t' from the lower gap of the double notch h4, and the magazine falls a short distance until the upper part of the notch h4 engages again upon the spring trigger-guard detent. By this fall of the magazine the spring-flaps J J close over the mouth of the magazine and provide a suitable surface on which to place the handloaded single cartridges.

Figs. 12 and 12 show in section a modified form of magazine more suitable for iianged cartridges. The magazine is so formed that the cartridges lie stepped above one another, so that the respective iianges shall not ride IOO IOS

IIO

upon oneanother, nor can an upper cartridge get its flange behind the lower cartridge.

Fig. 12b shows the plan shape of the [ollower, which at the flange end of the cartridge expands into alug on each side. These lugs work in stamped recesses at each side of one end of the magazine-case, so that thefollower is thus sufficiently controlled so that it cannot turn or get out of position. The follower is conveniently of a partially circular section, so as more readily to eject the bot-tommost cartridge.

To permit of the replenishing of the magazine directly from above, as by means of hand skeleton cartridge-cases P, Figs. 2 and 4, the top lips 7L of the magazine are made as springs to retain the cartridge, but wit-h their upper edges slightly turned back both to stilfen the spring-lip longitudinally and to admit readily the entry of the cartridge when pressed down by hand pressure directly from above.

Having now particularly described and ascertained the nature of the said invention and in what manner the same is to be performed, we declare that what we claim is- 1. In a magazine breech-bolt gun, the combination, with a suitably-recessed receiver, a

vertically-movable magazine, and the breechbolt andl barrel, of spring-flaps J J, projecting upwardly within the receiver and having integral therewith a forwardly projecting Vspring-tongue j, which forms in and of itself an inclined connecting-surface between the month ofthe elevated magazine and the chamber of the barrel, substantially as and for the purpose set forth.

2. In a magazine breech-bolt gun, a sear g, provided with a forward-extending cartridgeejector arm g4, this arm being located within the slot bS of the breech-bolt, into which projects the sear, and on the breech being opened the said arm projecting beyond the front end of the breech-bolt through a narrow extension of the slot b3, substantially as and for the purpose set forth.

3. In a magazine breech-bolt gun, the combination, with a fixed pivot-pin and with a,l sear having a pivot-pin parallel with the one first named,of thek separately-removable trigger G, having open-ended slots g2 g3 for its connection with said pivot-pins, respectively, substantially as and for the purpose set forth.

4. In a magazine breech-bolt gun, the combination, with the stock, a receiver, and a spring trigger-guard, of a breech-screw q, connecting the receiver to the butt-end of the stock and to the rear end of the spring trigger-guard and having a handle q in the shape of a folding stirrup or cross-handle, substantially as and for the purpose described.

5. In a magazine breech-bolt gun, the combination, with a receiver open and recessed at top and a vertically-movable magazine having short spring-lips on its upper edge, of spring-flaps fastened within the receiver at bottom and having upper edges which extend from end to end of the mouth of thereceiver and form a continuous support forl each hand-fed cartridge when said magazine is lowered,substantially as shown and described.

In testimony whereof We have signed our names to this specification in the presence of two subscribing witnesses.

SILVESTER KRNKA. KARL KRNKA.

Witnesses:

ADoLF FISCHER, RUDOLF LANG.

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