US717824A - Gem-setting. - Google Patents

Description

N0.717,s24. Y PATENTED JAN.6,1903.

" G. W. DOVER.

GEM SETTING.

APPLIGATION FlELED SEPT. 1'1, 1902.

N0 MODEL.

Mgr/E5555. JAM ET;

m: ucmms Pmns co. morouma. waswmmcm n c UNITED STATES PATENT Orricn.

GEORGE W. DOVER, OF GRANSTON, RHODE ISLAND.

vGiElVl-SETTlNG.

srnorrrcarron forming part of Letters Patent No. 717,824, dated January 6, 1903.,

Applieation'filed September 17, 1902. Serial No. 123,673. (No model.)

To aZZ whom it may concern:

Be it known that I, GEORGE W. DOVER, a citizen of the United States, residing at Crans ton, in the county of Providence and 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 gem-settings, and has for its purpose an improved means for retaining the setting-prongs against expansion. In another application, numbered serially 123,672,1have disclosed one means for attai ning this end, and my present invention is designed as an improvement thereon. The par,- ticular structure therein shown is adapted exclusively for use in settings for fiat-based gems, and the projections upon the arms of the supportingplanchet render the setting unavailable for use on some classes of jewelry.

To the ends above suggested my invention is as hereinafter set forth, and illustrated in the accompanying drawings. Figure 1 is a perspective view of my novel retaining-ring; Fig. 2, a transverse central section of a setting provided with this ring; Fig. 3, a planchet adaptedto be bent up into a setting; Fig. 4, a completed setting; Fig. 5, a transverse central section of a complete setting embodying my invention applied to a gem with a conical or pyramidal base, and Fig. 6 a detail of an unbent arm used with conical gems.

Like letters of reference indicate like parts throughout the views.

My setting is constructed as follows: A planchet B is struck or out from a sheet of metal consisting of a body portion a and radial arms I). The latter are provided with lateral shoulders 0, intermediate which rise points d. On either side of the bases of the points 01 and extending into the shoulders are slots 0. bent inwardly parallel to each other, as shown by one of the arms in Fig. 3. The arms are then bent upwardly into final position. I then insert a ring A, Fig. 1, in the slots 0 of the shoulders c of the prongs and upon this .place the gem, after which the points d are bent over the edge of the gem.

It is evident that the so-called ring A may be polygonal as Well as annular, and its contour may contain irregularities, without departing from the spirit of my invention, and it is with this-interpretation that the word ring is employed for this member.

When a conical or pyramidal based gem is used,the planchet-arm has its shoulders diagonally cut, asshown in Fig. 6.

Having thus described my invention, what I claim is 1. In a gem-setting the combination with the setting-prongs-of shoulders upon the prongs, slots in said shoulders, and a ring resting in said slots.

'2. In a gem-setting the combination with the setting-prongs, of shoulders upon the prongs, slots in said shoulders, 21. ring resting The shoulders c of each arm are next

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