US235353A - geldreich - Google Patents

Description

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JOSEPH GELDREIOH, OF GIOINNATI, OHIO, ASSIGNOR TO GEORGE DOERR,

' OF SAME PLAGE.

DIES FOR FRMING WATCH-CASE CENTERS.

SPECIFICATION forming part of Letters Patent No. 235,353, dated December 14, 1880. AApplicatiollfiled July 22,1850. (No model.)

To all whom it may concern:

Be it known that I, JosErE GELDEEICH,

of the city of Cincinnati, in the county 4of Hannilton and State of Ohio, have invented certain 5 new and useful Improvements in Dies `for Making Watch-Oase Centers, ofy which the following is a specification.

My invention relates to the manufacture of watch-case centers; and it consists in certain improvements in the dies for forming the same, whereby the reduction of the center to the required form can be accomplished in two operations.

In the accompanying drawings, forming part of this specification, Figure l, Sheet l, is a view of certain of the dies employed to form the centers, the lower die being shown in section, and the lower portion of the upper die also being shown in section, `the dies being in the position they must, assume before operating upon the sheet'of metal out of which the center is to be cut. Fig. 2, Sheet 1is a 'view of the dies represented in Fig. l, and shown partly in section, as in said figure, thev dies being in the position I,they assume during the operation of forming one side of the centerv and of cutting out the central portion thereof. Fig. 3, Sheet 1, is a view of the same dies, shown partly in section, and an additionalintermediate die, shown in section, the dies being in the position they assume immediately before beginning the second and nishing operation in makin g the watch-case center. Y Fig. 4, Sheet l, is a view, in perspective, of the watch-case center as finished by the dies. Fig. 5 is a view, in cross-section, of the center shown in Fig. 4. Figs. 6 and 7, Sheet2, are central vertical sectionsiof two pairs of dies, formingmodications of the dies shown in the figures of Sheet 1. y

The die A, Figs. l, 2, andB, is provided with a recess, B, which,viewed from Dbeneath, is circular in form. VThe exterior portion, H, of the die surrounding this recess is annular when viewed frcmbeneath. The inner edges, a, of this annular portion are rounded away,

as shown, while thefouter edges, b, are left sharp, in order to better enable `the die to cut out of' a metal sheet the blank which is to be 5o made into a watch-case center. This die is further provided with a central punch, C, which, viewed from beneath, is circular in form and of appropriate diameter to cut a propersized hole in the watch-case-cent-er blank.

The lower die, D, is provided with an au 55 nular recess, E, around a former, F, whose upper outer edges, d, are rounded, as shown, the recess being of sufficient depth to allow the blank to be readily bent down, and allow the curved edges a. of portion H of die A to 6o come below the lower edge of the blank when the latter is bent down. The former F is, when viewed from above, of a circular form.

In the center of the former F is a vertical opening, K, of sufficient diameter to just receive the punch O ofthe die A. The lower part of this die D is preferably provided with suitable strippers for throwing the blank, when bent, out of the die. Strippers, as e, are here shown, which consist of rods passing through 7o the bottom of the die, and arranged to be operated by suitable mechanism, so as at the proper time to strike the lower edge of the blank and press it up out of the diein other words, strip it from the former D. These dies are placed in any suitable press, and are so arranged that they can be brought together, when desired, by suitable mechanism.

The operation of the aforementioned dies is as follows: The sheet of metal G, out of which 8o the blank for the watch-case center is to be formed, is placed on the upper surface of die D. VThe die A is then caused to descend. The annular portion H first acts upon the sheet and f punches it into the recess E of the lower die, 8 5 and thus cuts out from the sheet a circular blank, g, of suitable diameter to form the watchcase center. The square edges b of portion H and thel square edges of the recess in die B contribute to cut the blank 0E squarely from 9o the sheet. The -annular portion H of the die A then continues to press down the edges of the blank around the former F. The rounded edges a. of the portion H assist in gently and gradually bending the blank down around the 9 5 former. As the annular portion H is finishing its work in bending down the blank around the formerF the bottom of the punch O has reached the blank, and, the die A continuing to descend,the punch() punches a hole through the center ofthe blank g. The two dies A and 1) are now together, and the blank g has now as-umed the form shown in Fig. 2. The upper die, A, is now elevated until it is such a distance above die D that the blank q can be readily withdrawn, und at the same time that the die A is rising the strippers e are raised, and their upper ends press against the lower edge of the blank g and raise the latter up off the former F, whereupon the blank is withdrawn.

Before describing the succeeding operation, whereby the blank is completely formed into a watch-case center, it will be necessary to further describe the mechanism by which the same is accomplished.

In the upper part of recess B in die A, and surrounding punch C, is an annular die, L, of the form shown in Figs. 1, 2, and .'i. This annular die may be iixed, and an independent set of strippers, properly actuated. used in connection therewith; or the die L may he made movable and attached to strippers h, sliding through holes in the die A, and so operated by appropriate mechanism that when the die L has nivshed its work it shall'act as a stripper in the manner hereinafter described.

A circular die, M, a vertical central section of which is shown in Fig.3, is provided underneath with an annular groove, m, between an annular depending flange or ridge, n, and a central depending circular stein or projection, p. The recess or groove my is so placed as to exactly receive the former F, the ridge n lapping down over the latter, as shown, while the projection p is of sncli a size as to exactly lit within the opening or cavity K in the former F. Thus the configuration of the under side of the die M is such that when the latter is fitted upon the former F, as shown in Fig. 3, any vertical pressure upon the upper surface of the die M will only tend the lnore firmly to hold 'the latter in its position upon former F. When, however, it becomes desirable, either the ridge n or the projection p may be dispensed with, and the ridge or the projection ivhichever one is retained) will hold the die in position.

The upper side ofthe die is provided with a circular elevation or projection, t, of the saine size as punch C, or, in other words, is ofa size to lit closely in the hole in the watchcase center blank g, which has been made through the agency of punch C. Around this central projection is an annular groove, V, of the same shape as is the end of the'blank g after being shaped over the former F, as shown in Fig. 2. The die M being placed upon former F, as shown in Fig. 3, so that the projectionp tits into opening or recess K, and the ange n fits around the top edge ofthe former, the blank g, formed as shown in Fig. 2, is placed upou'tlie die M in a position the reverse of that which it occupied when bent around the former, und the projection t ofdie M is ltted into the hole in the blank q previously made by the punch C. The upper die,

A, is now caused to descend, and the die L impinges against the end of the blank g, and, forcing the latter over and toward the center of said die, gradually bends the said blank into the shape shown in Fig. 4, thus completing the operations ot' swaging and otherwise forming the watch-case center. As soon as the die L has done its work the die A is elevated, and at a suitable time, while die A is rising, the strippers h are depressed and the die L forced downward, carrying the watchcase center ont ot' the recess B, whereupon it is taken away in readiness to be used in making up the watch.

The above operations may be performed by the modified form of dies shown in Figs. Gand 7 of Sheet 2.

In Fig. 6 die N is the same as die Aot Fig.

1, with this exception, that the dieL, its strippers, and central punch, C, are omitted, and die S is the same as die D, except that opening K is omitted from the former F. A sheet of metal ont ot' which a watch-case center blank is to be formed being placed in die S, 9o

the die N, being caused to descend, cuts the blank out of the sheet and forms it over former F, imparting to the blank the saine shape as the blank has assumed in Fig. 2, except that no hole is punched in the bottom of the blank.

The die N is preferably provided with suitable strippers-as, for example, strippers e, already described. Die T is like die L, the punch C being at the center of said die, as in die A, and die W takes the place of die M, an opening, K, being made in the bottom of die W of a size to just allow of the punch entering therein. The outer edge, X, ot' die T is preferably pointed, as shown, and the die W is preferably provided with an annular groove, y, into which the edge X enters as the die T descends, and by which the die T is steadied during the latter portion of its descent toward die W.

The blank g, after being formed by dies N S, as described, is placed in cavity Z of die W, in a position the reverse of that which it held when between dies N S, the curved end ol' the blank filling the cavity Z, (the latter cavity always being made of a suitable size to receive the end of said blank.) The die T, being now caused to descend, forces inward the edge of the blank and bends down the same, and when this operation is nearly completed the punch U reaches the center of the ICO IIO

blank g and punches out a hole of the desired size. The dies T and W are now together, and the watch-case center is ready to. be made up for and with the remainder of the watch.

The combination of dies as shown in Fig. 1 is preferred over that shown in Figs. 6 and 7, as it can be operated more rapidly.

The mechanical principle of arrangement whereby the watch-case center can be formed in two operations is present in the mechanism shown/in Fig. 3 and in the mechanism shown in Figs. 6 and 7. p y When desired the device for punching a hole in the blank, as punch C, may be omittedl from the dies, and the blank punched in a separate operation.

Where the punch C isl omitted the opening- K may be omitted from the former F, and 1n such a case, where die M is used, the projection p will be omitted from die M, andpro jection t will also be omitted unless the blank gis punched previously to being placed in die M; but I prefer to retain the punch along with the other devices. l

When desired, a hole, as shown in Fig. 3, may be made in die M, and the blank, after being formed over the former F,- may be punched during the operation of finally bending down the blank previously formed over former F, as is the case in operating dies T and W.

What l claim as new and of my invention', and desire to secure by Letters Patent, is.-

1. The combination of a die provided with recess B and annular portion H and a die provided With annular recess E and former F, substantially as and for the purposes specitied.

2. The combination of the die L and the die M, substantially as and for the purposes specified.

3. The combination of the die L and punch G and an opposing die, substantially as and for the purposes speciiied.

4. The combination of the die L and an op- 3 5 posing die, substantially as and for the purposes specified.

5. The combination of a die provided with recess B, annular portion H, and central punch,

C, and a die provided with recess E, and former 4o F, provided with recess K, substantially as and for the purposes specified.

6. The combination of the die A, provided with annular portion H, recess B, punch (J, annular die L, and the die D, provided with 45 recess E, former F, opening K, and die M, substantially as and for the purposes speciiied.

7. The combination of a die provided With annular portion H, and die L, and die D,pro vided with former F, and die M, substantially 5o as and for the purposes specified.

S. The combination of the die provided with annular portion H, and die L, movable in die A, and stripper-rods h, and die D, provided with former F, and die M, substantially as and 55 for the purposes specified.

WM. ED. JONES, GEO. M. LUoKEY.

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