US117388A - John s - Google Patents

Description

UNITED .renin s. cRAnY, or* SALEM, NEW YORK.

IMPRQVEMENT ih! METALLIC CARTRBDGES.

Specification forming part of Letters Patent'No. 117,388, dated July 25, 1871.4

To all whom it may concern Be it known that I, JOHN S. CRAEY, of Salem,-

in the county' of Washington and State of New York, have invented certain 'Improvements in Metallic. Cartridges, of which the following is a' specification, reference being had to the accom- View of a central lire-cartridge embodying iny` improvement, and Fig. 3 is a transverse section' r on the line a: a' of Fig. 2.

In constructing inyiinproved cartridge I provide a-metallic shell, A, made iii the sual form, and within this outer shell A I place. another shell, B, the two being arranged concentrically, as represented in Fig. 3, thereby forming two chambers for receiving the powder. As shown in Figs. l and 2,-the outer shell A should be enough longer, than the inner one te iit securely over the rea portion .oi' the bullet, to which it is snugly iitted, as is usual in this class oi' cartridges. It' it be desired to make it a rim-lire. then the two shells may be formed -with closed heads or bases, as represented in Fig. l, the outer one having a cavity in its rim or flange for receiving the fulminate D, as represented. The head or base of the two shells may be indented when formed so as to insure their being concentric when united, and I prefer to solder or otherwise secure thein together. The inner shell B may have its rear end left open and its edge be fitted in an annular recess formed for it in the head of the outer shell which will assist to secure it in place and facihtate the soldering of it -fast, as the solder may be placed in the recess,

the inner shell be inserted, and the soldering effected by simply placingthein upright on a suitable furnace or plate properly heated; When thus made the fulminateis inserted in the rim, the outer chambery filled with coarse or slowburning powder, and the inner or central cham Aber then )filled powder, and the ball inserted in the mouth ot the outer shell and tting close over the open end of the inner shell B. lf preferred, .the bnllet C may be made with a groove, E, in its base,

.breech-loading arnis,

lwith a finer or quick-burning into which the front end ofthe inner shell. will iit, as represented in Figs. l and 2 When such a cartridge is iired, the fnlniinate D will first ignite the powder in the outer chamber, and

as the ball moves forward the dame from the outer chamber will ignite the vpowdeiiat-the front end` of the inner chamber, which will then follow up' the bullet with a more poweril pressure. If it be desired to construct it as a central-lire cartrige, then the shells may be constructed as represented in Fig. 2, in which the outer shell A has a hole Vformed in the eei'iter of its head or base, and the inner one has its head struck up in the forni of a nipple or anvil, on which a cap,

D, can be placed, through the opening in the head of A. Or, if preferred, both of lthe shells may be thus struck up inthe forni of a nipple or' anvil, in which case soldering may be dispensed with. In this the central charge will be ignited first, and therefore the slower-burning charge in such case is placed in the inner or centra-l chamber and the quicker-burning charge in the outer chamber. A A

It is obvious that the comparative capacity "of the chambers may be varied as desired when making the shells. Itis also obvious that the same quality of powder may be used in both chambers if desired; but I ,deen'i it better to use ,a quicker charge in the 'chamber last tired, and with that view l propose. to use in the chambrlast ignited gun-cotto`n or' any similar ex-.

plosive in order to increase its power.l

Having thus described my invention, what I claim isi-,-

A cartridge, composed of twoseparate chargechambers, each filled with powder or its equivalent, and p rovidedr with fulminate or a cap,

whereby it can be exploded'in the ordinary substantially as set forth.

'JHN S. URARY.

Witnesses B. F. BANcnoFr,

L. SHELDON.

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