US34226A - Improvement in revolving fire-arms - Google Patents

Description

C; R.r ALSOP.

Revolver,

Pateued .'Jm. 21, 1862.

N. PETERS. PHOTOMTHOGRAPHER, WASHINTON. D 2v UNrTED Srarns reich.

C. R. ALSOP, OF MIDDLETOWN, CONNECTICUT, ASSIGNOR TO J. W. ALSOP, OF NEW YORK, N. Y.

Speeiticationforming part of Letters Patent N0. 3&226, dated January 2l, 1862.

To all whom tt may concern: d

Be it known that I, CHARLES R. ALsor, et' Middletown, in the county ot' Middlesex andA State of Connecticut, have invented certain new and useful Improvements in that class of Fire-Arms known as Revolvcrsg7 and I do hereby declare lthat thefollowing is a full, clear, and exact description of the same, reference being had to the accompanying drawings, forming part of this specification, in which- Figure l is a longitudinal section of a pistol with my improvements. Fig. 2 is a top view et' the same, partly in section. Figzisa perspective view ofthe hammer and its attached cam for forcing np the cylinder'. Fig. 4 is a rear end view ofthe cylinder. Fig. 5 is a front endview of the saine. Fig. 6 is a perspective view of one ofthe gas-rings.

Similar letters of reference indicate corresponding parts in the several figures.

To enable others skilled in the art to make andLu use my invention, I will proceed to describe its construction and operation.

A is the metal frame, of the form generally adopted for the frames of revolvers.

B is the barrel.

I C is the cylinder, fitted to revolve on the axispin I) in a well-known manner, and having ap plied between it and the-trontof the frame the spring E for forcing it back clear of the barrel preparatory to its rotary movements.

F is the rotating recoil-shield, having its journal ct tted to a bearing in the cross-piece A ofthe fraaie, having on the rear of said journal the ratchet-teeth b b, upon which the rotating dog G acts to produce the rotation of the cylinder, which is caused to rotate with the shield by a pin, c, on the rear of the cylinder entering a recess in the i'ace of the shield in a manner common to other revolvers.

H is the hammer, arranged to work upon a pin, d, passing through the stock in the usual manner. I is the cam for f'orcingthe cylinder up toward the barrel. This cam may be made ot'a separate piece of steel and secured by screws, rivets, or other suitable means t0 one side of the butt ofthe hammer, or maybe formed upon and of the same piece of metal with the hammer itself; or, in the case ot' an outside hammer, it may beformed upon or secured to the tumbler of the lock, orotherwise secured to the shaft of the hammer, and so attached to the hammer and compelled to move with it. This cam has the greatest portion ot' its circumference circular and concentric with its pin d, and has a recess, as shown at e. The

said cam is situated immediately in front'of a xed brace, A2, which is cast with the frame A, and the front of the said brace is hollowed out to form a bearing for the cam, which is t`1tted so easily to lthe pin l that it may always bear against the said brace. The full diam eter ofthe larger circular portion et' the said cam is such that when interposed between the brace and the rounded rear end of th'ejournal a, as it is when the hammer is down, the said cam will hold the cylinder so far forward as to canse whichever chamber is in line with the barrel to fit close np to the rear muzzle ofthe latter. The recess c need only be ofsuch depth that when itis presented opposite the rounded` end of-thejournal a it will allow thespring E to force back the cylinder far enough to let it rotate clear ofthe barrel, and said recess is so arranged relatively to the hammer that before the hammer has been moved far from the nipple toward the position in which it is cocked it brings the said recess opposite to theionnded end ot' thejournal, and so permits the cy1- inder to move back before the action of the cooking-dog on the ratchet-teeth b bcommenees. The fall ofthe hammer bringsthe stept'at the commencement ofthe recess into action on the extremity of thejournal a, and so forces the cylinder up to the barrel before the hammer strikes the nipple. Care should be taken in the construction that the axes of the pins D and (l should be in the same plane, that the action of the cam may be directly in the line of the axis ofthe cylinder. This mode of applying the cani is intended more particularly-tor small-sized pistols, which are to be cocked by the direct application ofthe hand to the hammer. The hammer is to have the mainspring and trigger applied in the manner common to tire-arms which are cocked in. that way, and therefore I have not represented those parts inthe drawings, but contined myself to the representation of the parts to which my invention relates and the parts necessary to explain it. The rotating dog Gr is arranged to swing upon a fixed pin, f, and is operated by means of a'pin, g, attached to the cam I.

J J are the gas-rings, differing from those commonly employed in the chambers of revolvers in being out or open longitudinally, as shown at s s in Figs. 5 and 6. They may be made each of a piece of steel plate rolled up, or be turned out of a solid piece of steel, and afterward cut longitudinally, and maybe made so that the edges of the split lap together in beveled form, as shown in Figs. 5 and 6,`or merely meet each other. The front portions of the chambers are counterbored to the requisite depth for the reception of these rings, which are crowded tightly into the so counterbored port-ions, and the rear portion of the barrel is counterbored for the reception of the front ends of the said rings, which either protrude from the said chambers or have the fronts of the chambers countersunk around them, as shown at a n in Figs. l and 5, for the reception of the rear end of the barrel. These rings, instead of being simply driven forward toward the barrel by the force of the explosion of the charges in the chambers, are expanded by such force, and so caused to be pressed laterally against the counter-bores of the cylinder and barrel, and make a more perfect joint than when merely pressed forward.

Ido not here intend to claim broadly the use of au oscillating cam to force forward the cylinder or breech toward the barrel preparatory to the iiring ofthe piece; nor do I claim broadly the use of gas-rings applied to the cylinder; nor do I claim broadly the construction of the hammer with a cam for the purpose of driving up the chamber against the barrel by the fall ofthe hammer; but

What I claim as my invention, and desire to secure by Letters Patent, is

The combination ofthe hammer-cam I with the rearward extremity of. the axis-pin D, in the manner and for the purpose herein shown and described.

CHAS. It. ALSGP. Witnesses:

MARIA W. BARNES, JONATHAN BARNES.

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