Totally enclosed fusible disc heat detector

Details Totally enclosed fusible disc heat detector Totally enclosed fusible disc heat detector

1997-02-06

1999-02-16

Pike, Andrew C.

Fire extinguishers

Processes

169 42, 169 65, A62C 3748

Patent

active

058710566

ABSTRACT:
A method and apparatus generates slack in a tensioned cable upon the presence of flame or excessive heat in a predetermined area. The apparatus comprises an enclosure having first, second, and third openings therein with the tensioned cable extending between the first and second openings; a pulley positioned on the cable intermediate the first and second openings the pulley having an eyelet extending therefrom; and a fusible disc secured to the third opening with the fusible disc having a hook extending therefrom and into the enclosure. The hook is attached to the eyelet of the pulley for restraining the pulley, and hence the tensioned cable, in a nonlinear or offset position with respect to the first and second openings. The fusible disc comprises a melting alloy which, upon reaching a known temperature level, undergoes a change in physical properties so as to allow the fusible disc to separate, thereby releasing restraint on the pulley and hence introducing slack into the tensioned cable.

REFERENCES:
patent: 5645128 (1997-07-01), Schwall

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