US109791A

US109791A - Improvement in devices for manufacturing metallic cartridge-shells

Info

Publication number: US109791A
Authority: US
Publication date: 1870-11-29
Anticipated expiration: 1887-11-29

Description

E. A. WORTHEN. I DEVICE FOR MANUFACTURING METALLIC CARTRIDGE SHELLS.

No. 109,791. Patented Nov. 29, 1870.

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UNITED STATES PATENT ()FFICE.

EDWARD A. WORTHEN, OF SPRINGFIELD, MASSACHUSETTS.

IMPROVEMENT lN DEVICES FOR MANUFACTURING METALLIC CARTRIDGE-SHELLS.

Specification forming part of Letters Patent No. 109,791, dated November 29, 1870.

To all whom it may concern:

Be it known that I, EDWARD A. WoRrHEN, of Springfield, in the county of Hampden and State of Massachusetts, have invented a new and useful Improvementin Devices for Mannfacturin g Metallic Cartridge-Shells; and I do hereby declare that the following is a full, clear, and exact description thereof, reference being had to the accompanying drawings making part of this specification, and to the letters of, reference marked thereon, in which Figure l is a longitudinal section of a metallic cartridge-shell made according to my improvement. -Fig. 2 is the same view of the shell after the head has been formed thereon. Fig. 3 is asection of the die, shdwing its form, together with that of the drawing-tool or punch; and Fig. 4 is a side view of the head ing-tool, showing its form.

My invention consists of an improvement in devices for the manufacture of metallic cartridge-shells wherein the punch or drawing-tool used has a shoulder formed near the end, and that part of the punch between said shoulder and the end is made somewhat smaller in diameter than the other part, so that when the punch is passing through the die, which is of one diameter throughout, in the operation of drawing the shell from a disk of copper, the exterior of the shell takes the form of the interior of the die, while the interior of the'shell takes the form of the exterior of the punch, and the shell, when drawn, has a part, at and near the head, made thicker for the purpose of giving it additional strength, this thicker part extending up all around from the head as far as desirable, according to the length of the small part of the punch.

The object of this invention is to strengthen that part of the shell which is usually strengthened by the introduction of a re-enforcing-cup, without the separate operations -of introducingand securing a separate re-enforcing cup within the shell.

That others skilled in theart may be able to make and use my improvement, I will proeeed to describe the same.

In the drawings,D represents the die, which is of an equal diameter throughout-,as shown at c, and the die in this matter is similar to those heretofore used, and is secured in place in any desirable manner. I

The punch D is made of a diameter and form ME to correspond with the interior of the shell, which is or" one diameter when drawn, and said punch has a shoulder at e, and that part below the shoulder at F is made somewhat smaller in diameter than the part E, so that when a copper disk oi. uniform thickness is driven through the 'die by the punch the metal will be reduced in thickness in that portion which surrounds the part above the shoulder e.

The form of the shell, after passing through the die or being drawn, is shown in Fig. 1, having an interior shoulder at e, thepart B and also the end being thicker than the part A above the shoulder a.

, he heading-tool, shown in Fig. 4, is of the same general form as those now in use, having a shoulder at a, and is tapered at b, the part N being made sufiiciently small to pass into the part B of the shell, when the outside heading-tool drives the head up, forming the flange.

This improvement in the method of forming the shell obviates the necessity of the dili'erent operations of making, introducing, and securing the common re-cnforcing cups within the shells, and gives the head of the shell any required or desired strength in the one operation of forming the shell.

Of course the different sizes of shells may have the difi'erent and corresponding thick nesses given them at the head, according as the relative proportion of the diameter of the parts E and F of the drawingtool D is maintained or varied at pleasure.

I am aware that cartridge-shells have been re-enforced by the introduction of metallic cups and other substances, which were secured within the head by different and separate operations, and I do not claim the same, nor any part thereof; but

Having described my invention, what I do