US172853A

US172853A - Improvement in the manufacture of metallic cartridge-shells

Info

Publication number: US172853A
Authority: US
Publication date: 1876-02-01
Anticipated expiration: 1893-02-01

Description

- w; E. Emma & BUCKLAND. MANUFACTURE QF METALLIC CARTRIDGE-SHELLS. No.172,853. Patented Feb. 1, 1,876.

are

UNITED STATES WILLIAM E. FRAZIER AND JAMES BUCKLAND, OF HARTFORD, CONNECTICUT,

PATENT QFFIcE.

ASSIGNORS TO THEMSELVES AND WILLIAM R. LANDFEAR, OF BROOK- LYN, NEW YORK.

Specification forming part of Letters Patent No. 172,853, dated February 1, 1876; application filed November 4, 1875.

To all whom it may concern:

Be it known that we, WILLIAM E. FRAZIER and JAnms BUOKLAND, of Hartford, in the county of Hartford and State of Connecticut, have invented. certain new and usefulImprovements in Metallic Cartridge-Shells and we do hereby declare that the following is a full, clear,'and exact description thereof, whereby a person skilled in the art can make and use the same, reference being had to the accompanying drawings, and to the'l'etters of reference marked thereon.

Like letters in the figures indicate the same parts. j

Our invention relates'to such shells or cartridge-cases as are used to form the ammunition for small-arms, and which are usually made of brass or copper. I

- It consists in a new mode or process of manufacture, whereby longer and stronger shells can be made, and of a less ductile material.

The ordinary method of making such shells isto first punch a circular disk out of a sheet of rolled metal, and then form the shell by turning up the edges and drawing it through dies. This crimps the edge of the turned-up metal together and draws it out to the required length.

Our improved method obviates the difficulty experienced in' crimping together the edge of a large disk to form a long shell, and insures greater uniformity of structure and strength in the metal.

Instead of using the circular blanks before mentioned, a sheet of rolled metal is placed under suitable dies, and a series of cups formed by depressing and stretchingthe metal under the punch or male die. This leaves the 1 top of the plate smooth, and of its original thickness between the cups.

These cups are then out out with a suitable punch, leaving a rim of the original plate around the top of greater thickness than the rest of the cup. These blanks are then drawn out through dies in the usual manner.

In the accompanying drawing, Figure 1 shows aplate with the cups formed in it by the dies. Fig.2 shows the cup-blank as cut out from the'plate. Fig. 3 shows the finished cartridge-shell.

A A, &c., are the cups struck out from the plate B. C is the blank cut out from the plate, and ready to be drawn or spun out in the usual manner to form the finished shell. D is the finished shell. Y

The machinery for makingand finishing the shells is of the usual construction, except 'for forming the cup-blanks, which must be struck up, as described, before the drawing process commences. These dies are best arranged in rows quincuncially to save metal in the plate, and may be struck a single row at a time, progressively across the plate, or many at once, as is found most convenient.

What we claim as our invention is- The improvement herein described in the art of making cartridge-shells, consisting in first striking up in a plate a series of cups, leaving the plate between the cups of its original thickness, then cutting out said cups, and finally drawing them to the form of the finished shell, as and for the purpose set forth.

1 WM. E.-FRAZIER.

JAMES BUGKLAND. -Witnesses: v

TnEo. G. ELLIS, WENDELL R. CURTIS.