초록 ▼

A gold jewelry clasp assembly is described, which includes a keeper for receiving a catch and retainer, wherein all of the elements are constructed to operate reliably over a long life time. The catch is formed of a tempered gold strip bent at its middle to form a folded leaf spring, and with one en

A gold jewelry clasp assembly is described, which includes a keeper for receiving a catch and retainer, wherein all of the elements are constructed to operate reliably over a long life time. The catch is formed of a tempered gold strip bent at its middle to form a folded leaf spring, and with one end of the strip bent into a loop around a pivoting wire retainer. The bending avoids a gold soldering operation on the strip which could degrade spring temper, and also permits welding of the retainer wire ends prior to attachment to the catch to facilitate heat sinking that minimizes loss of spring temper of the retainer. The keeper is formed of a drawn tub-shaped gold frame, with the edge that forms the opening of the tub-shaped frame, being cut away at opposite ends to leave a pair of projecting lips on opposite sides. A gold cover strip covers the opening of the frame, and the cover strip has a recess on either side that receives the frame lips in an interference fit. The frame and cover strip are joined together by gold solder lying only at the inside of the keeper along the corner where the frame and cover strip meet.

대표청구항 ▼

A gold jewelry catch assembly, comprising: a catch; and a retainer which includes a wire with a pivot portion pivotally held on said catch; said catch being formed of a unitary strip of gold alloy, said strip having a middle portion which is folded over to form a folded leaf spring and said strip be

A gold jewelry catch assembly, comprising: a catch; and a retainer which includes a wire with a pivot portion pivotally held on said catch; said catch being formed of a unitary strip of gold alloy, said strip having a middle portion which is folded over to form a folded leaf spring and said strip being of a spring temper along said middle portion, said strip having an eyelet at a first strip end and being bent into a loop at the other second end around said wire pivot portion, whereby to complete the ends of the strip without a soldering operation which could heat and anneal the leaf spring.