US205193A - Improvement in breech-loading fire-arms - Google Patents

Description

D. M. LEFEVRE. Breach-Loading Fire-Arm.

No. 205,193. v PatentedJune 25,1878.

/ZW v MM @QM UNITED STATES PATENT FFIGE.

DANIEL M. LEFEVER, OF SYRAOUSE, NEW YORK.

IMPROVEMENT IN BREECH-LOADING FIRE-ARMS.

Specication forming part of Letters Patent No. 205, l 93, dated June 25, 1878, application filed February l2, 1878.

To all whom it may concern:

Beit known that I, DANIEL M. LEFEVER, of Syracuse, Onondaga county, New York, have invented certain Improvements in Breech- Loading Fire-Arms, of` which the following is l a specification, referring to the annexed drawing, in which- Figure l is a longitudinal vertical section.

Fig. 2 is a top plan, Fig. 3, the lock-bolts; iig. 4, an end View of the breech-frame, partly in section.

The object of my invention is to give a more perfectly-fitting and permanent connection between the barrels and breech-piece than has heretofore been effected, with greater security, and less liability of the breech and barrels springing apart.

The barrels are connected with the breechpiece by means of certain hooks on the under side of the barrels, that are brought in contact with pins passing horizontally through the mortise in the breech-piece below the barrels, a part of which devices are old and have already been patented. The following are my improvements thereon.

The construction of the parts is as follows: The outline of the recoil-piece at c conforms in cross-section with the ends of the barrels. (See Fig. 4.) The tang b is similar in form to those in ordinary use. The projection c, which runs under the barrels, has a mortise, d, in it, into which the projections from the under side of the barrels iit, by which the parts are connected. These projections are three in number. The forward one, c, has a semicircular notch in its front face, that fits onto a pin, d', passing through the mort-ise d at right angles to the barrels. This pin Z enters a recess in the side of the frame, and its head has a square shoulder. lt screws into the opposite side of the frame, and by it the parts can be dra-wn together to compensate for wear. A blindscrew, d, is screwed in over the head of the hinge-screw to conceal it, as seen in the crosssection in Fig. 4.. The pin d serves as the pivot for the barrels to turn on when their rear ends are thrown up, as seen in Fig. l. In rear of the projection c there 1s a second one, f, so formed as to hook over a pm, over which pin the hook'f plays as the rear ends of the barrels are raised. By this means the movement is limited without bringing undue strain on the pivot. A permanent boss, g, projects up Within the mortise d, the faces of which are milled to the curve of a circle centering in the pivot d. This boss g ts into a recess between hook f and the rear projection h, made just to receive it. On the front face of the piece h there is a wear-plate, t', dovetailed to it, as clearly seen in Fig. l, and behind this wear-plate 'i there is a set-screw, j, by which the wear-plate can be set up as it wears away, so as to iit closely against the boss g, and assist in holding the barrels up against the recoil-plate. As a further security, a projection, k, extends backward from the rear end of the barrels, and ts into a corresponding recess in the recoil-plate, similar to some other arms, the important difference being that the projection k has square shoulders on its front face, as clearly seen in Fig.

'2., whichare cut to the curve of a circle centering on pivot d', corresponding with the shoulders in the recess in the recoil plate. This form of shoulder, instead of being rounded or wedged, as heretofore made, which allows the barrels a spring off from the recoil in ring, securely locks the parts together.

I form the locking-bolt l forked, as clearly seen detached, Fig. 3, l. An additional bolt, m, is connected with l below, catching into a notch in the rear of projection h, thus doubly bolting it. The bolts l m are limited to their shank n bya single screw, o. They are forced,

forward by a spring, s, under the tang, bearing against the shank n, and are drawn back by a thumbpiece, p. (Seen in Fig. l.)

The frame and barrels are held together by means of a hinge-strap, g, curved on its face to correspond with the end of the projection c on the breech-piece. The shank of this strap is keyed to and moves with the barrel.

The lug l1. on the barrel, over which the shank of the hinge-strap q fits in the usual way, has a wear-plate, i', made and adjusted in the same manner as, and for an analogous purpose to, the wear-plate t' on the projection h, before described.

To compensate for the Wear of the lower bolt m, above named7 I employ a screw, m', that is screwed down upon it.

Having thus fully described my improvements in re-arms7 I claiml. In breech-loading fire-arms, the projection 7c, formed with square shoulders on its sides, in combination with the recoil-plate, provided with a corresponding recess, the shoulders on said projection and on the recess being curved in the arc of a circle struck from the pivot on Which the barrels turn, substantially as and for the purposes described.

2. rEhe compensating-plate i and adjustingscrew j, attached to the projections h upon the barrel, as and for the purposes specified.

3. The screw m', for compensating the Wear of the lower catch-bolt m, as above specified.

In Witness whereof I have hereto signed my name in presence of Witnesses.

DANIEL M. LEFEVER.

Witnesses:

J. J. GREENOUGH, J Amis S. THoRN.

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