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:
Nov. 18, 1980
Filed:
Aug. 02, 1979
Robert K Baker, Elvins, MO (US);
Potter Electric Signal Co., St. Louis, MO (US);
Abstract
A plug-type alarm switch for supervision of handwheel water valves and the like has an enclosure having a key-locked cover and containing, wired in series, a two-connector female receptacle and a normally closed enclosure cover tamper switch. The receptacle, otherwise movable within the enclosure, is held in place on being mated through a passage in the enclosure wall to a two-prong male plug, which is shorted by an insulated loop of wire passed through the handwheel. If the handwheel is turned, pulling the loop, the plug and receptacle are unmated, opening the switch circuit and signalling an alarm. The unmated receptacle will not remain aligned with the passage for reinsertion of the plug prongs; to restore the circuit the cover must be unlocked and removed and the receptacle must be physically held in proper alignment as the plug is reinserted.