USRE6022E - Improvement in primers for cartridges - Google Patents

Description

UNITED S'rnries OFFICE rrirornr J. POWERS, or NEW Yoeri, N'. Y.

IMFRCW'EI!!EN'l IN PRIMERS FOR CARTRIDGES. f

Specification forming part of Letters Patent No. 115,592, dated June 13, 1871; rel sue No. 6,022, elated August 18, 1874; application filed March 7,- 1874. v

in CartridgeGases for Freecell-Loading Guns,

and Primers for the saine, of Whiclrthe followA ing is a specification, reference being had to the accompanying drawing, forming part thereof, in Which- Figure l, a central sectional View of set of tools that may he used in making the batt of' my improved eartridgecase, which is shown in a position ready to receive thelbutt, for the purpose of crimping on a metallic gaschecl. Fig. 2 is a View, partlyin section, of.' a can tridgecase `with. a metallic gas-cheek placed upon the butt ready to be introduced into and operated on bythe tools, Fig. l. Figw'is. a similar view of the same tools and cartridgecasc after the springdie 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 po* sition shown in. Fig. 3. Fig. is a circular piece of metal designed for o. gas-cheek on thc butt of the cartridge-case. Fig;u 6 is a centrati sectional View' of the same piece of metal cupped up preparatory to being,` placed upon4 the butt ot' the cartridge-case. Fi g. 7 is a View,

partly in section, of a cartridge-case ready to receive the gas-check, Fig. 6. Figs.. S and 9 are enlarged views of the primer detached.

The nature of my invention consists in applying and fastening a gas-check. formed of a thin plete of metal to the exterior surface of the butt of a cartridge-case having an ammlar projecting base, and that has a )eroration made through the butt for the purpose of cffecting a center' priming. /Vhcn the butt of' a cartridgecase is perforated for they purpose ci' pri'mingit, which is usually lone when the }-=rlming is placed in the center oi' the butt, there is always a liability to an escape or' gas en firing the cartridge in a gun. 'lo obviate this liability, I apply a gas-check to the cx tcrnal surface of the butt in the following maar ner: A i

I cut from a thin sheet of copper or other suitable metal a disk, Fig. 5, a little larger in diameter than the cartridge-butt. This disk is first. by a proper punch and die, bent into the shape shown in Fig. 6. It is then placed upon the butt of a cartridge-case having an annular projecting base, Fig. 7, as seen in Fig. 2, A. In this figure, A is the cartridge-case, made and center-primed in the ordinary manner. B is a supporting-punch inserted into the case, and a the gasfcheclr. The case, v

tions, so as to ladmit the britt of the case with its gas-check a. Arr ann'niar groove, c, is malle.

in the inner vfece er the die, and the butt the cil-'5e is inserted just far encrzgli to" si, ,j the projecting 'base ci' the lenti. rcgf'thc cese into the plane of this groove. Tlief'eoclret D is their forced downward, the/aing mouth d .acting against the incliimliirqiecticn e ol the end ol' the die 5, forcing the sections inward, and bringing ,thorn inte thc position shown in Fig. 3, thus bending the rim of the gascheck a. over the projecting hase g of the butt oi the case. and securely and neatly fastening it ons The'socket l) is then forced upward, the secf'/ tions seperate, and the caee 1s removcilwitli the gascheck applied. and. secnrelyettaclxed. The primer which l use for the cartridge conN anvil init, and secured therein by compreesing the month or open end of the cap, as :shown in Figs. 8 and il, where the primer ie shown detached end. enlarged, for the purpose of showing it more4 plainly'. In these figures, la, represente the cap, which. has n layer, n, of fnhninate over its interior lease, as usual. "N'Vithinthe cap il, I insert edgewise o) metallic disk or anvil, e, which is made by being' punched from sheet metal, of the required Siae and form, and to hohl this anvil in., the month of cap is comm-esseri oy ineens of a suitable tool, so as to leave a small central opcningf', as shown in Figs. 8 and t), for the .tiro to escape when the primer is exploded.

By these means I produce an efficient primer, and. the rounded or spherical end is admirably adapted to t the pocket or cavity in the head of the` shell, which is in like manner rounded orhemispherioai at its'bottom, it beingr less liable to fracture the metal 1n forming it thus than when made with more abrupt angles.

I am aware that cartridge-eases have been made having twothieknesse of metal in the butt; but in all such .cartridge-cases known to me either a metal -enp is inserted within the .case proper, for the purposes of an angle or to re-enforee the bnttyorthe closed end rof the oase, madewith'an annuiar projection around the base,'is inserted. into a regularly-formed second eajse,'differing from the rst,`if at all,

only in being shorter, and having a flanged or projecting base. Ido not eiairn either of these forms of double headed'ear'tridgacanes'; but

`What I do claim as my invention, an desire to secure by Letters Patent, isbh A primer consisting ofV a percussion-cap,

havin g' an anvill emnnposev of a piece of metal insert-ed. edgewse thereimandseeumi in pia'oe by comp'ressing'or bending inthe edge of the cap, substantially as described.

Witnesses: l

ALFRED A. .FURMAN, .Onmmo P. SMITH.

TIMOTHY J. POWERS,

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