U.S. patents available from 1976 to present.
U.S. patent applications available from 2005 to present.

Gold jewelry clasp assembly

Patent 4520537 Issued on June 4, 1985. Estimated Expiration Date: Icon_subject June 4, 2002. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.

Patent References

Re26898

329494

626973

813838

856606

1778554

2477780

2952058

2986792

3036353

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Inventor

Assignee

Application

No. 06/049544 filed on 06/18/1979

US Classes:

24/616, Having connected leading edge and separated trailing arms24/116A, Bead chain fasteners24/70JJewelry

Examiners

Primary: Sakran, Victor N.

Attorney, Agent or Firm

International Classes

A44C 5/20 (20060101)
A44C 5/18 (20060101)

Abstract

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.

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