US608362A

US608362A - Island

Info

Publication number: US608362A
Authority: US
Publication date: 1898-08-02
Anticipated expiration: 1915-08-02

Description

No. 608,362. Patented Aug. 2, I898.

' G. W. DOVER.

GEM SETTING.

(Application filed Nov. 98, 1897.)

(No Model.)

lcs. 1

INVENTOR.

v W/T/VESSES.

B) fix f6,-

. ATTORNEY.

UNITED STATES PATENT OFFICE.

GEORGE WV. DOVER, OF PROVIDENCE, RHODE ISLAND.

GEM-SETTING.

SPECIFICATION forming part of Letters Patent No. 608,362, dated August 2, 1898. Application filed November 23, 1897. $erial No. 659,578. (No model.)

To all whom it may concern.-

Be it known that I, GEORGE W. DOVER, of the city and county of Providence, in the State of Rhode Island, have invented a new and useful Improvement in Gem-Settings and in the Process of Manufacturing the Same, of which the following is a specification.

In the accompanying drawings, Figures I, II, and III represent the different shapes of my improved setting formed by the passage of a blank through successive dies to its com pletion. Fig. IV shows my setting after the insertion of a gem. Fig. V is a type of the prong and point in common use, with dotted line indicating the shape after graving.

Similar figures of reference indicate corresponding parts. A

Much difficulty has been experienced hitherto in m akin g ge m-settin gs by machinery which equal in appearance those made by hand. By the latter method the ends of the prongs were recessed for the reception of the stone. The rectangular form of the prong-points made it necessary, after bending them overthe edge of the gem, to file or grave those portions which thus projected above the stones surface in order to remove the shoulders formed at the end of the points.

The object of my invention is to produce a gem-setting whose prong-points shall be so formed as to dispense with the necessity of graving or filing after the insertion of the gem; also, to effect this end by a mechanical process which will dispense with the labor and expense attendant upon hand production.

.To secure this end, I manufacture my setting thus:

A blank, as illustrated in Fig. I, is struck from a metal strip, and it comprises a series of substantially radial prongs 1, the extremities of which are cast upon the lines--as, for instance, of a hexagon or other angular geometric figure-according to the number of prongs with which it is designed to provide the setting. The ends of the prongs are offset, in effect, by forming shoulders 9 9, produced by cutting an angular recess in one side of the prongs at their ends, and the back of the as indicated at 8, and extends thence in a straight line tangential with respect to a circle concentric with the center of the blank and substantially at right angles to the front face of the next succeeding prong. A die and plunger next perforate the blank with substantially radial openings 3 3, Fig. II.

The prongs 1 1 are now twisted by swagingtools into a plane at right angles to the body of the blank and drawn up into their final upright position, Fig. III, by the customary means. To set the stone 6, it is only necessary to bend the points 5 5 inwardlyby slight pressure upon the hypotenuses 2 2, whereby the inner faces 7 7 of the points 5 5 contact with the upper surface of the stone 6 and the shoulders 9 9 contact with its lower surface, while the slight curvatures S 8 at the exterior bases of the points disappear.

Having thus described myimproved setting and the process of its manufacture, I claim as new and desire to secure by Letters Patent 1. A gem-setting comprising a plurality of prongs provided respectively with an angular recess and a concave curve at the opposite sides of their extremities whereby, when the point is bent over the gem the latter will be retained in the angular recesses and the curvature of the edges of the prongs will disappear, substantially as specified.

2. A gem-setting comprising a series of prongs, the extremities of which are arranged at an angle with respect to each other, each of said prongs being provided at the opposite sides of its extremity with an angular recess and a concave-curved edge, the body of the setting being provided with a series of substantially radial openings extending approximately in alinement with the front faces of the prongs and at anauglewith respect to their rear faces, substantially as specified.

Vitness my hand November 15, 1897.

' GEORGE 'VV. DOVER.

Witnesses:

SARAH E. LUMMIs, JOHN J. MOKIE-RNAN.