Jewelry closure having a magnetic clasp with safety features
Patent 5349725 Issued on September 27, 1994. Estimated Expiration Date: 
November 13, 2012. 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.
November 13, 2012. 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 1807293 2178572 2654929 3129477 3263444 3566616 Clasp for ornaments Closure device and buckle Openable ring with safety locking means Ring shank InventorAssigneeApplicationNo. 976213 filed on 11/13/1992US Classes:24/303, HAVING MAGNETIC FASTENER24/616, Having connected leading edge and separated trailing arms63/15.7Peripheral or segmental sectionsExaminersPrimary: Sakran, Victor N.Attorney, Agent or FirmInternational ClassesA44B 021/00A44C 005/00 AbstractA jewelry closure includes a magnetic closure and a mechanical closure which is a safety feature, preventing the magnetic closure from being opened inadvertently. A plate-like mechanical closure member attached to one of the magnetic closure members engages a complementarily shaped portion of the other magnetic closure member when the magnetic closure is secured to provide a mechanical second closure for the jewelry. The combined magnetic and mechanical jewelry closure may be used to close chains. The closure may also be disposed on a hinged ring. The ring may be used for passing through ends of a decorative chain as a closure for the chain. The closure may also be used on a hinged ring for wearing on a finger and is particularly useful if the finger joints are swollen. Other uses include adaptation for a hinged charm for closing a chain or for adding to a chain.Field of SearchHAVING MAGNETIC FASTENERHaving connected leading edge and separated trailing arms Requiring manual force applied against bias to interlock or disengage Forming total external surface of projection Having resiliently biased interlocking component or segment Spring Partially blocking separate, nonresilient, access opening of cavity Formed from wire Having curved or bent engaging section conforming to contour of projection Ornamental and/or object supported MAGNETIC Releasable catches Flexible Plural, separable With integral interlock Peripheral or segmental sections | |
