US270996A

US270996A - Paper cartridge-case

Info

Publication number: US270996A
Authority: US
Publication date: 1883-01-23
Anticipated expiration: 1900-01-23

Description

(No Model.)

T. L. STURTEVANT.

PAPER CARTRIDGE CASE. No. 270,996. Patented JaQn.Z3, 1883.

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UNITED STATES PATENT OFFICE.

THOMAS L. STURTEVANT, OF FRAMINGHAM, MASSACHUSETTS.

PAPER CARTRIDGE-CASE.

SPECIFICATION forming part of Letters Patent No. 270,996, dated January 23, 1883.

Application filed September 5, 1882. (No model.) 7

of the invention, such as will enable others skilled in the art to whichit appertainsto make and use the same, reference being bad to the accompanying drawings, and to letters or figures of reference marked thereon, which form a part of this specification.

Heretofore in chambering the breech end of the barrels of fowling-pieces for the reception of the cartridge-ease a common practice has been to create a swell in the bore in front of the cartridge-case, which gradually vanishes in the bore proper. By this means an enlargement or space exists in front of the cartridge-shell sufficiently large to permit a wad to tilt or cant as the piece is discharged, thereby failing to properly perform the office required of it. In my present shell I bevel or chamfer its mouth upon the inside to a thin edge, which, when the cartridge is loaded, is rolled or turned over the outer Wad, this annular chamfered or beveled lip, upon explosion of the charge, being distended or straightened and crowded into the enlargement of the barrel in front of the cartridge and filling the latter, thereby constituting, for the time a portion of the bore of the barrel, which thus becomes of practically-uniform diameter from the cartridge-shell outward. The bevel in the mouth of the shell also facilitates,to a marked degree, the insertion of the charge and wads in the act of loading. To facilitate closing the shell, the outer margin of its mouth is preferably beveled, as shown at f, Fig. 3, this external bevel being shorter than the internal bevel, e.

The drawings accompanying this specification represent, in Figure 1, a side view of a cartridge-shell partly broken away to show the inner bevel at the mouth thereof, the shell being open. Fig. 2 represents a side view of a loaded cartridge partly broken away to show the folded mouth thereof, said cartridge being in its place in the bore of a gun-barrel, a part of which is shown in section. Fig. 3 represents a view similar to Fig. 1, except that the cartridge has an external bevel as well as an internal one, the former being the shorter.

In these drawings, A represents the rear end of the barrel of a breech-loading shotgun, or its bore proper, and b the cartridgechamber thereof. The swell in the bore of the barrel before alluded to is shown at c, and the portion of the cartridge-chamber in front of the shell at (I. 1

The cartridge-shell is shown at B as of any one of the various forms now in use.

In carrying out my improvements I cham fer or bevel the inside of the mouth of the shell B, as shown at e, the length and form of the bevel being such as when extended to fill the space at in front of the shell and provide a bore of uniform diameter from such shell outward, as well as to produce a trumpet-mouth to the shell, which greatly facilitates its loading.

In loading the shell the beveled portion is turned or: rolled down over the outer wad, as usual.

In the use of a cartridge-shell containing the inner bevel above described, such bevel, upon discharge of the cartridge, is straightened out by the escape of the wads and charge and the expansion of the gases from the powder and fills the enlargement d, the result be ing that the diameter of the bore from the head of the shell to the bore proper, a, is uniform. For this reason wads cannot cant and become misplaced, and the recoil of the piece is lessened by filling the enlargement d.

I claim- 1. A paper cartridge-shell ior breech-loading shotguns, having its mouth beveled upon the inside, as and for the purposes stated.

2. A paper cartridge-shell having a bevel upon the inside of its mouth and alesser bevel upon the outside thereof, as explained.

In testimony whereofI afiix my signature in presence of two witnesses.

THOMAS LEGGETT STURTEVANT.

Witnesses H. E. LODGE, F. CURTIS.