Electricity: electrothermally or thermally actuated switches – Thermally actuated switches – With fusible – combustible or explosive material
Patent
1974-12-23
1976-05-11
Harris, G.
Electricity: electrothermally or thermally actuated switches
Thermally actuated switches
With fusible, combustible or explosive material
337416, H01H 3776
Patent
active
039567265
ABSTRACT:
A heat detecting conductor embodied in a flat tape wherein conductive strips in an open circuit are separated, at acceptable temperatures, by thermoplastic insulating material which is adapted to melt at predetermined elevated temperatures and to permit the conductive strips to come into contact with each other, thereby closing the electric circuit and actuating an audible and/or visual alarm. The heat detecting conductor may be associated with a cable carrying one or more service lines or with a cable connected to one or more heat detecting devices, as a back-up therefor, or may be used alone.
REFERENCES:
patent: 2774850 (1956-12-01), Ziccardi
patent: 3138686 (1964-06-01), Mitoff et al.
patent: 3588776 (1971-06-01), Horwinski
McCarthy John J.
Starkey Kenneth C.
Cerro Corporation
Harris G.
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