US350048A - O o o ooo o o o - Google Patents

Description

(N0 ModeL) E. DU PONT.

GUNPOWDBR PRESS. No.35Q048. PaentmiSept.28,188&

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UNITED STATES PATENT UEETCE.

EUGENE DU POXT, OF VILMINGTON, DELAWARE, ASSIGNOR TO E. J. DU PONT DE NEMOITRS C: (0 OF SAME PLACE.

GUNPOWDER-PRESS.

:LPECIE'ICATION forming part of Letters Patent No. 350,048, dated September 28, 1886.

Application filed June 5, 1585.

To all whom, it may concern:

Be it known that I, EUGENE Du loNr, a citizen of the United States, and a resident of \Vilmington, in the State of Delaware, have invented a certain new and useful Machine for Compressing Explosive Compounds; and I hereby declare that the following is a full, clear, and exact description of the same, rel'- erence being had to the accompanying drawings, forming part ol. the specification.

In said drawings, Figure 1 is a view of my improved machine, taken in vertical section. Fig. 2 is a view of tllOlllOltl-pltttO, showingthe recesses of molds for holdingthe powder to be compressed.

Similar letters indicate similar parts in different figures.

. A A is a frame for holding the operative parts of the machine.

B B are two hydraulic pistons or rams for exerting requisite compressive force.

0 O are chambers into which wateris forced to operate the e01npressing-pistons.

I) I) are pipes for supplying water to the hydraulic pressu re-chambers G G. Said pipes communicate with the same pump or with pumps arranged to operate the pistons or rams equally.

In my machine it is very desirable that the two pistons or rams should move and exert compressive forcepqually, and as machines of this character are generally of large size and great strength, because very great power isto be applied, both the pistons are of considerable weight. In ordcr that the two pistons, ii. arranged in a vertical position one above the other, should act with equal pressure or be balanced. it is necessary that the pressure-chamber oi thelowerpiston should be slightlylarger than that of the upper piston, if both pressure-chambers' are to be supplied by one or by equally-acting pumps. This may be accomplished by enlarging the chamber of the upper piston-rod, as shownin Fig. 1, or any other well-known means should be used to regulate the compressive force of the pistons, so as to equalize the same.

E is a fixed mold-plate containing a number of apertures, X X, for the reception of powder, and in which the powder is to be compressed. These apertures are generally of Serial No. 167,740.

(X0 model.)

I have shown as made movable by means of" toggle-joint I, which, by the suitable. connections K, is arranged to move all the pins or needles upward together through the centcrot' the plungcrs (1. Attached to the other armor piston are other plungers, L, also corresponding in size, number, position, and arrange ment with the apertures X X for the powder in' the plate 1'], and provided with a central holc, M. to receive the movable pins or needies H.

The operation 01' this machine is as follows: A quantity of powder is poured upon the plate E and swept into or otherwise placed in the apertures X X until such apertures are substantially full. The lower end of the apertures are closed at this time by the ends of the pl ungers G. The pins or needles H do not project above the surface 01' the plate 1 so as to prevent the easy filling of the apertures X X. Vhen the apertures are all tilled, hydraulic pressure is applied to the rams or pistons B B, and such rams or pistons move toward each other withequal compressive force. The plungcrs (l and L enter the apertures X X on opposite sides and compress the powder between them, and atthe same time the pins or needles ll are raised by the toggle-joint l1 and its connections K, so that the pins or needles enter the holes M in the opposing plun- 9c gcrs. The result of this operation isthat the powder inihe apertures is compressed with equal force at both ends, and the result is the formation ola large grain of the desired dimension aml form, (cylindrical or prismatic,) in which the ends of the grain, being compressed with equallymoving pistons or rams, are both hard, while the central parts of the grain are comparatively soft when thegrainis removed from the molding apertures. A 1.0

grain of such construction having two hard ends and a comparatively soi't center is of great advantage in firing large ordnance, as it' burns with rapidity from the center as well as the ends when once started, though the initial rate of combustion is slow, owing to the con1- pacted ends.

It is obvious that the machine may be arranged with the pistons moving horizontally; but in that case the filling of the molds with powderwould be much more difficult. It is also obvious that other connections may be used for moving the needles than the togglejoint I and its connections K, the particular mechanism shown in such location not being an essential portion of myinvention. v

I contemplate constructing my machine with the needles or pins immovable, and, if desirable, I dispense with such needles or pins altogether and form solid grains.

The product of this machine is more fully ters Patent, is

In a machine for'forming grains of explosive compounds, the combination of a fixed moldplate containing suitably-formed apertures fo r molding powder, two equally moving and bal- I aneed rams acting to compress the grains from both ends, and pins passing through the apertures in said mold-plate and having a longitudinal motion therein independently of said rams, substantially as and for the purposes described.

EUGENE DU PONT.

\Vitnesses: V

.THoMAs HUN J. I HrNnoN HYDE.

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