Improvements in the Construction and Manufacture of Bezels or Settings for Precious Stones.

摘要

4400. Rubatto, H. Feb. 21. Filing-apparatus, reciprocating; work-holders. -Bezels for precious stones are formed from a single piece of metal, and comprise a flat ring 1 having claws 2, 3 disposed at right-angles thereto. A steel templet s, having an internal diameter just sufficient to fit the metal tube 4 from which the bezel is to be cut, is used to guide the tool. The templet and tube are secured to a holding-tool t by wax, and the claws 2 formed by cutting and filing away the metal of the tube; the parts are then inverted and the claws 3 formed in the same way. Alternatively, the bezel may be formed from a flat metal blank with wings which, after being bent, form the claws, parts of the metal being afterwards forced back to form the flat of the ring; or in a single operation of the press, the metal may be compressed between two dies having the necessary spaces for the ring and claws.