US664725A - Gem-setting. - Google Patents

Description

Patented Dec. 25, I900.

D. W. COSTIGAN.

GEM SETTING.

1 (Application filed Ap 14, 1900.1

!No Modem UNITED STATES PATENT OFFIQE.

DENNIS W. COSTIGAN, OF PROVIDENCE, RHODE ISLAND.

GEM-SETTING.

SPECIFICATION forming part of Letters Patent No. 664,725, dated December 00- Applioation filed April 14, 1900.

T0 aZZ whom it may concern:

Be it known that I, DENNIS W. COSTIGAN, a citizen of the United States of America, residing at No. 30 Prairie avenue, in the city and county of Providence, in the State of Rhode Island, have invented certain new and useful Improvements in Gem-Settings, of which the following is a specification.

My invention relates to a gem-setting for rings; and the object of my invention is to provide a setting upset and out, respectively, from one piece of sheet metal, so as to have a series of prongs exposed to receive a series of gems, as hereinafter described and claimed.-

Referring to the drawings, Figure 1 is a top plan of the strip of metal from which the gem-settings are struck up. Fig. 2 is a top plan view of the blank as cut from the said strip of metal to form my improved setting. Fig. 3 is an edge view of the same. Fig. 4 is a top plan view of the blank, showing the result of the second operation, whereby the die upsets the blank to the required shape for cutting. v Fig. 5 is a longitudinal sectional view taken in line mm of the same. Fig. 6 is an inverted view of Fig. 4. Fig. 7 is a top plan view of the blank and showing the result of the third operation after it has been cut by a suitable die. Fig. 8 is a perspective view of the gem-setting and showing the sides of the same turned upward and ready to receive the stones. Fig. 9 is an inverted view of Fig. 8. Fig. 10 represents a side elevation of the ring complete.

Similar letters of reference indicate corresponding parts in the diii'erent figures of the drawings.

My improved gem-setting is made from a plain strip of gold or other metallic stock A, and by means of a suitable die and plunger I form a blank B, shown in Fig. 2, having its longitudinal edges b to surround the body portion in a segmental form and its end edges 1) converging inwardly to a point 79 of the center of the blank.

For the purpose of illustrating my improvement I show a blank struck up and forming three settings from one piece of stock. The blank B is next carried to a second die and plunger, which upsets the stock into a form C, as shown in Figs. 4, 5, and 6, having acentral longitudinal portion (1, curved, as shown in Fig. 5, and extending from the said curved Serial No. 12,934. (No model.)

portion to the-outer side edges b b of the stock are angle-walls e 6, having their apex f divided equidistant from each other upon either side of the blank 0, as indicated in Fig. 4. At the outer extremity of each angle-wall e the die compresses the stock thinner to form a shoulder g, and from the bottom edge of each angle-wallthe stock is rounded over, as seen at h. In a third operation the last-aforesaid blank is cut by a die into the form D, as shown in Fig. 7, said die cutting from the apex of the angle-walls at a point 11 to the points j j (see Fig. 4) and thence inwardly upon each of the rounded portions h to a point is, and the cut-away portions of the angle-Walls e e form the prongs to receive the stones; The sides of the blank D are then turned upward from each outer edge of the central portion at to the shape as seen in Fig. 8, and the hoop or band E is secured by soldering to each end portion of the setting at a point l l, as shown in Fig. 10, after which a gem m is placed within each of the series of four prongs and resting upon the shoulders g, and the extending port-ions of the prongs are then bent over the edge of the gem to secure it in place.

By-this construction I make by a simple method a series of two or more settings,united to and integral with the next adjacent setting, from one piece of stock and does not require any soldering of one with the other.

I claim as a novel and useful invention and desire to secure by Letters Patent The herein-described gem-setting D, upset and cut, respectively, from one piece of sheet metal, said piece having a central longitudinal curved portion d with, outwardly-extending angle-walls e e, each of said walls cut inwardly to form prongs, each of said prongs provided with a shoulder g, so constructed that when the sides of said piece are bent up ward aseries of prongs are exposed to receive a series of gems, in combination therewith of the band E having each end united to each end of the said piece D by solder, substantially as described.

Signed by me at Providence, Rhode Island, this 12th day of April, A. D. 1900.

DENNIS W. GOSTIGAN.

Witnesses:

TERENCE M. OREILLY, VIGTOR'DE LA BARRE.

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