US87593A - Improved cartridge-making machine - Google Patents

Description

UNITED STATES PATENT OEEIcE.

BENJAMIN S. ROBERTS, OF UNITED STATES ARMY.

IMPROVED CARTRIDGE-MAKING MACHINE.

Specification forming part of l Letters Patent No. 87,593, dated March 9, 1869.

Be it known that I, BENJAMIN S. ROBERTS, of the United States Army, have invented a new and useful Improvement in thc Manufacture of Cartridge-Gases; and I do hereby declare the following to be a full and exact description thereof, which will be better under- .stoodby reference to the accompanying drawings. 4

My invention relates more particularly to those cartridge-cases used in fixed ammunition, in which the fulminate isplaced in a ring or :flange at the base of the cartridge.

It is very important, wherever metallic cases of any kind are used, that such cases, as well as the chamber in which they are to be eX- ploded, should be slightly tapered, so that when retracted ever so little they will` be loosened and become easily removed from the chamber.

I propose to construct the cartridge-cases is a cylindrical shape, and then place the fulminate in the ange in the usual way, which is readily donc. It is then of the form shown in Figure 1. It is then inserted' in the die A, Fig. 3, in which there is a tapering aperture,

made a shade larger at the top than the external diameter of the cartridge-case, Fig. 1.

A plunger, B, worked by the eccentrics E E, then presses the case gently into the die, which gives it the desired taper, and is, moreover, sure to make them all of precisely thel same size and shape, which isfound of great advantage when they come to be used.

The cartridge-case being forced home, as shown in Fig. 4, a cylindrical projection, f, upon the plate or follower v(l is then elevated by the cam D, and raises the tapered case from its seat, when it can be readily removed and another substituted in its place.

My machine shows the method of pressing the shell into the tapered die by a follower that takes on the base of the cartridge; butI claim. the right to have the die in the follower, and to taper by the reverse means, setting the cartridge on its base or head and pressing the follower down onto the shell instead of pressing the shell by a follower into the die.

I am aware that George Wilson, in his patto show whether or how he ever manufactured one of those shells. His shell was, besides, made open at both ends. It was not intended to receive the fnlminate in its flange, and even that iiange itself was not so strengthened and sustained as to serve for the retracting-pin to sieze hold of in order to start it from its seat in the chamber. I do not claim anything that is thus shown.

I am also aware of the patent of Hiram Berdan, dated February 27,1866, in which he proposes, by the use of a die, to contract the open end of his cartridge-case so as to grasp the bullet; but he not only has a solid body within his case, upon which it maybe contracted, but

contemplates the application of a blow, which would be fatal to the object proposed by me'. Berdan proposes only to contract the open end of his cartridge-case, while I contemplate giving it a uniform taper from end to end. I make no claim to anything found in Berdans patent.

Finally, I am aware that S. W. Wood, in his patent of 1862, and William Johnson, in his patent of nearly the same date, suggest the idea of a taper-shaped metallic cartridgecase, but they show no way in which such eases can be constructed successfully. Their inventions rest merely in idea. I do not pretend to be the first ever to have conceived such an idea, but only the first to have made it practical.

Having thus restricted the scope of what I deem my invention, I claim- (lonjointly, the hereinbefore-described machine for and method of tapering metallic cartridge-shells throughout their entire length, after the same shall have been charged with the fulminate, in the manner shown.

B. s. RoBEETs.

Witnesses ELEAZER K. FosTER, WM. E. FOSTER.

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