The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Sep. 28, 1982
Filed:
Feb. 25, 1981
Leon G Barry, Shelby, NC (US);
Willis E Rieman, Shelby, NC (US);
Fasco Industries, Inc., Boca Raton, FL (US);
Abstract
A one-piece wire lead has intermediate its ends a thin, flattened section which is seated against a recessed die surface that is formed on one end wall of a hermetically sealed chamber in a preferably transparent, paraboloidally-shaped plastic housing. The two cylindrical leg sections of the lead project out of the opposite end of the chamber for connection in series with a conductor in a circuit that is to be protected. A plastic, electrically non-conductive, spring-loaded sabot is mounted to reciprocate in the chamber between a retracted position in which a sharp cutting edge on the forward end thereof faces one side of the flattened section of the lead, and an advanced position in which the sabot cutting edge has cut through the flattened lead section, and has extended into a recess in the die surface. Normally a compacted, granular thermal plug is cast or molded around either the sharp cutting edge of the sabot, or its operating spring, thereby normally to retain the sabot in its retracted position. When the ambient temperature of the fuse exceeds a predetermined value the plug melts suddenly and permits its spring to drive the sabot cutting edge suddenly through the flattened section of the wire lead completely to sever the lead intermediate its ends.