US78803A - hopkins - Google Patents

Description

I @uitrit'giedrev @strut @fitta .Letters Patent No. 78,803, dated June 9, `1868.

' IMPROYBD 'IOOLV FOR REJEWELLING WATCHES.

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TO ALL WHOM IT MAY CONCE'RN Be it known that I, C. HOPKINS, of the city and county of Philadelphia, and State of Pennsylvania, have invented a new and improved Toolfor Rejewelling Watches g and I do'hereby declare the following to be a full, clear, and exact description of the same, sufficient to enable those skilled in the art towhieh my invention appertains to makeuse of it, reference being had to the accompanying drawings, forming part of this specification, and in whichi `l'igure l is a side view of the mailling-instrument.

Figure 2 is a longitudinal section, showing the tool when applied to its work.

Figures 3 and 1 Vare side views of the end ofthe reaming-tool.

Figure 5in a cross-section of the reamingtool through the line a: a: of lig. 2.

Figure Vti is a perspective view ofthe socket which holds the jewel, and

Figure 7 is a cross-section of the same. i

In all the gures the parts are represented as greatly magnified. j A

This tool is designed to fas'ilitate the work ofthe watch-repairer in lifting the flange of the socket or bezel in which the previous jewel, now broken out, was set, so that the new jewel can be readily dropped into place.

It may also be employed for reaming out the socket or bezel where it is too small for the newjewel, or hasy been damaged by the breaking out of the old one.

In the drawings, A represents a circular or voctagon'al metallic bed, provided with a clamp, a, regulated by set-screws. That part ofthe watch which is to be rejewelled, represented by the red lines in iig. 2, is laidnponf the bed, andfastened iirmly in position4 by means ofthe clamp just described. l .v

' In thus adjusting the part ofthe watch, caremnst be taken to bring thefjewel-hole directly over a hole, c, in the bedA. The hole c contains a. centring-sorew, J', which has a point, e', projecting upward towards thejewelhole, provided at the centre of its extremity with a minute acieular depression, in which `the centring-needle` of the roaming-tool is-stepped` during the operation. The part to be rejewelled having been thus brought into position and clamped, the centring-screw .Tis adjusted by screwing it up or down in the bed to the extent required to bring the point z' to the proper place, and the operation of preparing the socket to receive the new jewel is ready to commence; j

The great difficulty in resetting watch-jewels arises from the form of the socket in which they are held, which is shownclearly in figs. 6 and 7. The plate to be jewelled is thin, and the jewel-hole is acireular aperture through it, having a V-shaped groove or channel-around its circumferential wall, a little below the middle ofthe wall. Thejewel rests on.the under flange e e, formed in the wall bythe groove above described, and the upper llang'e, e e', laps over the edge of the jewel, holding it firmly down in place. When the jewel is broken out it is exceedingly difficult to lift or turn up this upper flange e e', in order to make room to drop the new ,jewel into place, from the fact that the holes are lso minutel that the groove and ilanges are almost microscopic,

and it is well nigh impossible to get hold of the iange properly and turn it. up uniformly around the hole, except by use of an expensive jewelling-lathe, possessed by comparatively. few watchmakers,and, from its expense, quite beyond the reach of many.

To obviate this difficulty I have invented the apparatus above described for properly holdng'the part to be rejewelled, andin connection with that apparatus I use a tool for lifting the iiange or". roaming out the hole, which is represented clearly in'figs. 1 and 2, and which VI will now describe. i

This tool consists of a handleB, a shank or tang, D, and two long bentarms' Gr G, projecting from the shank, as showniin iig. 2, and springing outward from each o ther. The periphery of these arms is cut into a. screw7 and a nut, F, encircles them, enabling the operator, by screwing it down towards their point, to force the arms together, or, by screwing it uptowards the tang, to allow them to springhapart. Between these arms is a centrng-needle, I, extending from their point through the tang, and terminating in a chamber or hollow in the handle '13. In passing through `the tang,it is provided with a screw-thread, j, by means of which it can be set in or out to any degree required by the nature of the work. The handle B simply slips over or screws uponlthe end of the tang, and canbe readily removed to allow the operator to get at the head of the centringneedle for the purpose of adjusting it.

The extremities of the arms G G are made of steel, and are formed as shown clearly in gs. 3 and 4, having several sharp projecting edges mm1 m2, arranged one above another, theV metallic surfaces between them I being either smooth, as shown in g. 3, or out longitudinally into sharp corrugations, as shown at n n, iig. 4.

i This completes the description of the apparatus which I employ. Its operation is as follows:

Having the part to be rejeivelled in position, as hereinbefore explained, I screw the nut F down on the arms G G until their ends Will easily enter the jewel-hole together. Then I adjust the needle Iv as required, having done which, I step its extremity in the minute depression in the centring-screw, which I have already described., I then uscrew the n'ut F,when the arms spring out until their extremity m1 comes in contact with the Walls of the socket or bezel, the salient edge of the instrument entering under the upper ange e of the socket, and lodging in the V-shaped groove* or channel, as shown in fig. 2. i The instrument may now be rotated upon the;centringneedle, when the extremity of the arms G G at the point o`will press out against the lange e, so as to bend or burnish it upall around the hole, enlarging the opening of the socket to the extentdesired. The instrument may now be witl1drawn,and the jewel dropped easily into position, after which the turned-up flange e may be burnished down again upon the edges of thejewel, by means of a small well-polished steel burnisher.

i If the hole has been damaged, or is too small for the jewel, and it be desired to enlarge it, the form of tool shown in iig. 4 may be used, having the sharp cuttingI corrngations n n. This, upon being rotated as above described, will ream out the hole to any required size, the appropriate centre and depth of' the hole or socket being, in the mean. time, maintained by means ofthe centre-needle I, around which thc instrument rotates.

It will be observed that the arms G G, between the points m1 and in, taper upward from their extremity. This is to adapt their extreme ends ,to operating under the flange e', in va bezel like that above described. Between the points mand m, the diameter being larger adapts this part to holes too large for the small extreme points to operate in satisfactorily, and above m m1 being still larger, adapts this part to ver)1 large holes, as for 'fthe insee-wheel. Thus the instrument Vis adapted to all the varying necessities of this branch of the watchmakers business. l

Having thus described my invention, what I claim as new, and desire to secure by Letters Patent, is 1. The bed A, havin'g the elamp a and the oentring-sorew J, substantially as and for the purpose above described.

set forth.

3. The reaming-tool above described, composed essentially of the bent spring-arms G G, having the cutting- 2. Forming thcends of the Naming-instrument, las shown at m m m2, substantially as and for the purpose.

edges mm1 mz, and the exterior.screw-threads, with the adjustable centringmeedle I, and the screw-nut F,'

working up and down upon the arms G G,'lin the manner described, all said parts -being constructed and arranged to operate together substantially/as specified.

Y C. HOPKINS.

Witnesses:

JAMES H. Gnintur, GnAs. A. Perrin

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