US127308A - Improvement in metallic cartridges - Google Patents

Description

J. COCHIRAN.

Improvement in Met'allic -Cartridges.

Patented May 28,1872.

)fiz nasueb ail Uurrnn STATES PATENT OFFICE.

JOHN w. coonnnn, or ew YORK, N. Y.

IMPROVEMENT IN METALL IC CARTRIDGES.

Specificationforming part of Letters Patent No. 127,308, dated May 28, 1872 antedated May 14, 1872.

invented a-new and useful Improvement in Cartridges, of which the following is a full,

clear, and exact description, reference being had to? the accompanying drawing forming part of this specification, and in which- Figure 1 represents a longitudinal section of V a cartridge having my invention applied to it;

Fig. 2 an edge view of a wad or cleaner and lubricatorkused in the cartridge, showing the same before being finished and inserted in the shell of the cartridge; Fig. 3, a face view of said wad-cleaner and lubricator under similar conditions; and Fig. 4, a transverse section of the cartridge at the-line 00min Fig. 1.,

Similar letters of reference indicate correspending parts throughout the several figures of thedrawing. 7

My invention consists in a cartridge which has forits component parts a shell, its charge, the ball, and a lubricating-wad cleaner, arranged between the charge and ball, and com-' posed of an elastic material or body charged with plumbago or lubricating material, in a pulverulent state, whereby said wad-cleaner not only operates during its expulsion with the ball to clean out the bore of the gun, but also to lubricate it and so facilitate the discharge of a succeeding ban -or, in other words, to

keep the bore of the barrel in both a clean and slippery condition. This double function of the wad, whereby it acts both as a cleaner and lubricator, is effected in part by the. yielding or elestic character of its body and in part by the plumbago or other lubricatin gpowder with which said body is charged, and which, unlike case has no corrodin or inuriousefl'ect u on the ball or metallic shell of the cartridge.

Referring to the accompanying drawing, A represents the shell. of the cartridge; B, its

' charge; (3, the ball; and D, the lubricatingwad or cleaner. This wad or cleaner is composed of a plug or body, b',of cork, wood, or other suitable yielding or elastic material, made cylindrical to correspond with the shell, but of somewhat larger diameter than the interior of the latter. or serrated at itsedge, as represented in Figs. 3 and 4., and thewhole rolled in powdered graphite, or plumbago, or other lubricating powder, orsuch lubricating substance is otherwise forced into the cuts or cavities c in the body, and the latter or its periphery'generally charged with the powder. This being done the wad or cleaner is forced through a taper funnel or tube into and to its place in the shell,

the same being compressed while thus being driven home, and the plumbago or lubricating powder d securely held in the cuts or recesses c in the body.

When the charge is exploded in the cartridge the lubricating wad orclcaner D follows in the wake of the ball, the gases acting upon the latter Only through the wad, which by'reason of its compressed condition in the shell and, elasticity when out of it, forms such a close fit,-

to the shell and to the bore of the barrel and its grooves, that the gases cannot pass the wad to'impair its action, but'the wadin pass-L ing through the bore not only wipes it out, but.

deposits over its whole surface a thin film of the plumbago or other lubricating powder.

What is here claimed, and desired to be socured by Letters Patent, is

The combination of the shell A,the charge 13, the ball 0, and the wad or cleaner D charged with lubricating powder, substantially as.

specified. v

-: I J. W. GOUHRAN.

Witnesses:

FRED. HAYNES,- lt. E. RABEAU.

Such body is then nicked

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