US115892A - Improvement in metallic cartridges - Google Patents

Description

Patented June t3, 1871.

T. J. POWERS.A

Improvement in Metallic Cartridges.

UNITED STATES PATENT OFFICE.

TIMOTHY J. POWERS, OF NEW YORK, N. Y.

IMPROVEMENT IN METALLIC CARTRIDGES.

To all whom it may concern:

Be it known that I, TIMOTHY J. PowEns, of the city, count-y, and State of New York, have' invented a new and useful Improvement in Cartridge-Cases for Breech-Loading Guns, of which the following is a specitication, reference being had to accompanying drawing forming part thereof, in which- Figure l is a central sectional view of a set ot' tools that may be used in making the butt of my improved cartridge-case, which is shown in a position ready to receive the butt for the purpose of crimping on a metallic gas-check. Fig. 2 is a view, partly in section, of a cartridge-case, with a metallic gas-check placed upon the butt ready to be introduced into and operated on by the tools, Fig. l. Fig. 3 is a similar view ofthe same tools and cartridgecase after the spring-die has been closed down upon the butt of the case and the gas-check has been thereby fastened on. Fig. 4 is a face view of the end of said tools when in the position shown in Fig. 3. Fig. 5 is a circular piece of metal designed for a gascheck on the butt ofthe cartridge-case. Fig. 6 is a central sectional view of the same piece of metal cupped up preparatory to being placed upon the butt of the case. Fig. 7 is a view, partly in section, of acartridge-case ready to receive the gas-check, Fig. 6. A

The nature ot' my invention -consists in applying and fastening a gas-check, formed of a y thin plate of metal, to the exterior surface of the butt of a cartridge-case having an annular projecting base, and that has a perforation made through the butt for the purpose of effectin g a center priming.

When the butt of a cartridge-case is perforated for the purpose of priming it (which is usually done when the priming is placed in the center of the butt) there is always a liability to an escape of gas on firing the cartridge in a gun.

To obviate this liability I apply a gas-check to the external surface of thebutt in the following manner: I cut, from a thin sheet of copper or other suitable metal, a disk, Fig. 5, a little larger in diameter than the cartridgebutt. This disk is first, by a proper punchl and die, bent into the shape shown in Fig. 6. It is then placed upon the butt of a cartridgecase having an annular projecting base, Fig. 7, as seen in Fig. 2, A.

In this figure, Ais the eartrdgcfease, made and centenprimed in the ordinary manner. B is a supportingpunch, inserted into the case; and a the gas-check. The case, punch, and gas-check are to be carried up` into the sectional spring-die O until the gas-check is brought into contact with the lower end ofthe center mandrel E. This spring-die0 is divided at the lower end into several sections, e, the divisions extending up far enough to permit each section to act as a spring, being bent a little outward, thus separating the sections so as to admit the butt ofthe case with its gascheck (t. An annular groove, c, is made in the linner face of the die, and the butt of the case is inserted just far enough to bring the projecting base ofthe butt ofthe case into the plane of this groove. The socket D is then forced downward, the iiaring mouth d acting against the inclined projection c of the end of the die O, forcing the sections inward and bringing them into the position shown in Fig. 3, thus bending the rim of the gas-check a over the projecting base g of the butt of the case and securely and neatly fastening it on. The socket D is then forced upward, the sections G separate, and the case is removed with the gas-cheek applied and securely attached.

I am aware that cartridge-cases have been made having two thicknesses of metal in the butt, but in all such cartridge-cases known to me either a metal cup is inserted within the case proper, for the purposes of an anvil or to re-enforce the butt, or the closed end of the case, made without an annular projection around the base, is inserted into a regularlyformed second case, difteringfrom the first, itat all, only in being shorter and having a flanged or projecting base. I do not claim either of these forms of double-headed cartridge-cases; but

W'hat I do claim as my invention, and desire to secure by Letters Patent, is

A center-re cartridge-case, having the butt perforated for the purpose of priming, when there is combined with it a gas-check that is formed and applied and fastened to the butt of the case as described, substantially as and for the purposes specified.

TIMOTHY J. POWERS.

Witnesses P. ODEA, G. V. MULLIGAN.

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