US55425A - Improvement in operating dies for forming articles of metal - Google Patents

Description

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ELI J. MANVILLE, CF VATERBURY, ASSIGNOR TO HIMSELF AND SIDNEY S. CLARK, OF TORRINGTON, CONNECTICUT.

IIvIPROVEIVlENT IN OPERATING DIES FOR FORMING ARTICLES 0F METAL.

Specification forming part of Letters Patent No. 55,1125, dated June 5, lSGG.

To all whom tt 'may concern:

Bc it known that I, ELI JosrAI-I MANVILLE, of Vaterbury, in the county of New Haven and State of Connecticut, have invented, made, and applied to use a certain new and useful Improvement in Operating' Dies for Forming Articles of Metal; and I do hereby declare the following to be a full, clear, and exact description of my said invention, reference being had to the annexed drawings, making part of this specification, wherein- Figure l is a vertical section of my apparatus. Fig. 2 is an elevation ofthe same with the plate that holds the dies in place removed. Fig. 3 represents a chisel point formed on a round wire by my apparatus, and Fig. 4 is a view of a pyramidal or tapering point similarly formed.

Similar marks of reference denote the same parts.

In Letters Patent granted August 9th, 1864, to O. L. Hopson and H. I). Brooks a mode of making round or circular articles of metal by means of revolving dies actuated by stationary cams is set forth. The said device is not adapted to the forging of prisma-tic, pyramidal, or polygonal articles in consequence of the motion of the dies around the article being shaped. Dies have been arranged in a radial position and operated on by a grooved camwheel contiguous to the said dies, the dies themselves having projections entering said groove 5 but there was no provisions for adjustment in case of wear.

The nature ofmy saidinvention consists in an adjustable tappet or tappets revolving around and acting upon the outer ends of dies standing radially in a supporting-stock, so as to operate on opposite sides of a piece of metal introduced between such dies, whereby a chisel or brad-awl point, a nail or pyramidal point, or other shape bounded by planes or nearly flat surfaces can be produced with great rapidity and precision, and ofa shape corresponding to the surfaces of the dies.

By this arrangement the power that actuates the dies operates directly upon the ends of said dies, so that great power can be applied to them, and .the adjustment of the tappets allows for wear.

In thedrawings, et is a die-stock, sustained by the brackets b or other suitable supports. Within the end ofthis die-stock a transverse recesses are formed for the reception of the dies, which dies can slide in said stocks toward each other, and radially, or nearly so, to the center ofthe stock af. I have shown four of t-hese dies, they being arranged in pairs c c and Z d. There might, however, be only two dies where the article to-be formed only required pressure on two sides, or a larger number might be employed.

The dies c c d d are retained by a cap-plate, e, with an opening in themiddle.. Said capplate is removed in Fig. 2.

Around the stock a is a pulley or wheel, f, having said stock for its gudgeon. This wheel f carries adjustable cams or tappets g, regulated by the screws h, and the outer ends of the dies o c d d, projecting slightly from the stock a, are acted upon by the tappets as they come around and pressed together, the respective pairs being acted on in succession.

The wheel j' may be revolved by a belt or other competent means.

The inner angles of the dies c c d al are beveled, so that the parts that come in contact as the dies move are inclined planes; hence as the dies c c are pressed together their inclined edges force open the dies d d, and the reverse, thus causing the one pair ot' dies to be removed by the act of closing the other pair, so that any springs for opening the dies are rendered unnecessary, and the speed of the moving parts is only limited by their strength. l

This improvement may -be employed for pointing wire or nails, forging nails, or for drawing down or reducing prismatic wires or rods, in which latter case it will be necessary to form an opening through the center of the stock a.

1t will be evident that a similar operation would take place if the wheel f remained stationary and the cams c c el d andstock a were revolved together with the piece of metal to be shaped, but I prefer the construction set forth.

What I claim, and desire to secure by Letters Patent, is-

l. Two or more dies fitted to move radially In witness whereof l have hereunto set my in a stock, in eombinationwith an adjustable signature this 8th day of August, 1865. tappet or tappets revolving` around the said v v stock and acting' directly upon the outer ends ELI J. MANVILL. or edges of said dies, substantially as set forth.

2. Pairs of radial dies formed with their oon- Witnesses tiguous edges beveled or at an inclination7 as PETER LAWLOR,

speeied. J oHN ONEILL7 Jr.

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