US530915A - Island - Google Patents

Description

UNITED STATES vPATENT Ferca..

CHARLES M. ADAMS AND GEORGE W. ADAMS, OF PROVIDENCE, RHODE ISLAND.

.JEwELi-:Rs PRESS.

SPECIFICATION forming part of Letters Patent No. 530,915, dated December 18, 1894.

Application filed December 26, 1893. Serial No. 494,717. (No modell) To all toi/tom, t may concern:

Be it known that we, CHARLES M. ADAMS and GEORGE W. ADAMS, of Providence, in the county of Providence and State of Rhode Island, have invented certain new and useful Improvements in Jewelers lScrew-Presses;

and we do hereby declare that the following is a full, clear, and exact description thereof, reference being had to the accompanying drawings, and to the letters of reference marked thereon, which form a part of this specification.

This invention relates to that class of screw presses used for stamping sheet metal, and

which are called jewelers presses. Its object is to accomplish with one motion of the Fig. 2, shows a vertical section of the press,

taken through from frontto back ou line x, m, Fig.l. Fig. 3, shows a punched washer. Fig. 4, is a perspective view of a cup finished. Fig. 5, shows a vertical cross section of a cup. Fig. 6, shows in section, the punching devices seen in Fig. 2, with the punches lower down. Fig. 7, is a horizontal section of the plungers that hold the punches, on line y, y, Fig. 2. Fig. 8, represents a face view of the lower end of the inner plunger. vation of the inner plunger, separate. y

As before stated, the object of the invention is to accomplish the punching out of the blank and the drawing of it out to form a cup, at one operation. In the screw presses that jewelers use, a blank or washer is first punched out by a partial turn of a screw, and my improvement enables the operator to draw the blank into a cup, without removing it from the die, by continuing the'motion of the screw a little farther around. This saves at least one-half of the time over the usual way of changing the cutting punch for a drawing punch, and feeding the blanks previously punched, into the die one at a time by hand. There is not so much motion of the screw required in performing the two operations at once, asis necessary in drawing the washers after they are Fig. 9, shows a front elel punched inl the usual way, for in feeding the blanks into the die by hand, the punch must be raised high enough to let'the fingers pass under it, while in Vpunching and drawing at the same time, the punch is onlyl required to rise sufliciently high to allow the sheet metal at one operation, for the blank is more accuto slide under it; and the work is better done time they are punched out, than when sepa rately put in thev die by hand.

The construction is as follows:

A, is the standard of the press; B, the screw nut, and L the working screw.

D, is an outer plunger for holding the washer punch b. The plunger D, is fitted to slide in ways ct, a, cast on or otherwise at` tached to the face of the standard A, and the plunger F, is vfitted to slide in a chamber made through the plunger D, and is connected to the screw L, by a split collar c, screwing into the upper end of the plunger.

The plunger F, is recessed in at its lower end atj,f(see Figs. 8 and 9) to hold the drawing punch d. The recess j, is carried in be` 'rately centered for the drawing punch at the youd lthe center of the plunger, as shown by the dotted lines in Fig. 8, to receive the hanged head of the punch d, and a hole s, is made in the center to receive the stem of the punch. The manner of inserting this punch in its place, is as follows: Before the punch socket b, isput into the end of the plunger D, the head of the punch d, is passed up inside ythe plunger D, into the wide part of the reside of the plunger D. See Fig. 2.v The washer punch g, has a hole through its center to receiveand guide the drawing punch d, and the punch g, is held in the socket b,

by a set screw Z, in the socket. The inner plunger F, has a spline at m', fast in it, fittingin a slot in the other plunger to prevent it from turning. The plunger F, and its 8 cii roo punch d, are moved `by the screw independent of the plunger D, which moves only when locked to the plunger F.

The locking devices are constructed as follows: A recess fr', is made through the front of the plunger D, and a little projectionf, is made just below the opening t'. Ablock n, is tted to slide in the recess 7l, and its ends are beveled ott at o, o. The recess t, is made narrower above the block n, so that its sides will project over that block, and prevent it from rising in the recess. A recess a', is made in front of the plunger F, near the top,

leaving the 'part fu, `projecting out the full size of the plunger; but -thespace m, between the recess and the upper end of the plunger, is planed off enough to be below the part c, and the upper edge n', of `the recess, is beveled od at the. saule `angle as the corners 0, of the block n. A plate'C, is attached to the head of thestandard in front, by means of the bolt t, which passes through a slot inthe plate and screws Iinto the Ahead of the standard. The plate C, extends down in front of the press, to about the middle of the plunger, and has its lower end turned square in toward the plunger, to `form a ledge p. A recess r, is cut out of the inner side of the plate C, just above the ledge 79, and has its upper edge beveled off to like `angle as the corners o, of block n. The outside .of the nut B, above the flange by which it is fastened to the standard A, has a screw thread made on it, and a collar J, split :through on one side,`with a vertical flange on each side of the split, has a screw thread made Aon its inside, itting into the thread on the nut, and a bolt s', passing through the two flanges, serves to close and tighten the collar on the nut wherever it `may be set. This collar is set to limit the distance the screw can be turned down.

The operation `is asfollows: lVith the pants in position as shown in Fig. 2byturningjt'he screw L,the plunger F,is carried down and carries with it the plunger D, by the block n, the inner end of which projects into the recess a', in the plunger F. This block fn, is Lprevented from being pushed outby thebeveled su rface, because of its outer end bearing against the inner face of the vplate C, until the plunger Y D, has gone down far enough for the block ln,

to be pushed out of the recess a', into `the recess r, and the block n, will bring up against the led ge p, and the motion of the plunger D, will be stopped thereby. The point at which the plunger stops, is when the punch g, has just cut through the sheet metal, and the plate C, can be set by means of the slot and bolt t, at any desired point for `this purpose;

but the continued motion ot' the screw L, carries the plunger F, down farthenas the low space m, 0n the plunger, allows its upper end to pass the block n, until its punch d, has passed down into the blank cut by punch g, the distance necessary to form the cup. The `return motion of the parts is in this way: rllhe motion of the screw L, being reversed, the plunger F, will be drawn up until the lip n, catches under the inner end of the block n. This will begin to carry the block n, and plunger d, up, and the outer end of the block n, will be pushed clear into the recess a, by the bevel on the recess r. This brings all parts in position, as when the operation described began. By setting the plate C lower down, the block will be held from being pushed out and the press can be used as a single acting one.

Having thus described our improvements, we claim as our invention- 1. In a screw press, two plungers or `inan- 4drels with punches, operated by the same screw, in combination with said screw, substantially as described.

2. In a screw press, thelcoinbination of two sliding punches operated by the same screw, and means for connecting one ot' said punches with the other punch, and for disconnecting it from said punch, and means for locking said punch when `so disconnected, to prevent its further motion, substantially as set forth.

3. Ina screwpress, the combination of two slidingplungera one working inside theother and operated by one screw, the inner plunger being recessed in its lower end as described to hold a drawing punch, a socket in the outer plunger holdinga cutting punch, said cutting punch havinga hole through it to receive the drawing punch, substantially as described.

A. In a screw press, the combination of two sliding `punches operated by the same screw and slid-ing one i-n theother, the outer plunger `having a recess through it, and a recess in the front of the inner plunger having projecting edges at the lower edges of the recesses in the ,plungers andthe upperside of the recess in the inner plunger beveled away, a front plate adj ustably attached to the press standard and having a recess in its lower end the 'bottom of which projects inward rand the upper side of which is beveled away, a block iitted to slide in the recess in the outer plunger and having its ends beveled, substantially as described.

CHARLES M. ADAMS. GEORGE W. ADAMS. Witnesses: l BENJ. ARNOLD, JAMES E. ARNOLD.

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