Fail safe control device

Details Fail safe control device Fail safe control device

1993-01-11

1993-11-30

Broome, Harold

Electric heating

Heating devices

With current connection and/or disconnection means

236 99B, 337309, H05B 102

Patent

active

052667790

ABSTRACT:
A fail safe temperature control device which consists of a nonelastic container or bulb adapted to be subjected to temperature changes, a capillary tube and a pressure responsive device. The container generally is located in the area in which the heat is to be controlled, typically an oven or other heated area. The capillary tube is connected to the container at a first end and to the pressure responsive device at a second end. The nonelastic container, capillary tube and pressure responsive device form a closed system which is filled with a thermally responsive material. The pressure responsive device operates a control device, typically consisting of a normally closed contact and a normally open contact.

REFERENCES:
patent: 4691097 (1987-09-01), Theiss et al.

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