Electricity: electrothermally or thermally actuated switches – Thermally actuated switches – Expansible or vaporizable fluid actuated
Patent
1976-07-23
1978-02-21
Broome, Harold
Electricity: electrothermally or thermally actuated switches
Thermally actuated switches
Expansible or vaporizable fluid actuated
200 4, 337313, H01H 6108
Patent
active
040755932
ABSTRACT:
A thermally actuated switch including a motive member which is adapted to move one contact either toward or away from its opposed mating contact in response to an increase or decrease in pressure in a fluid actuating heat sensing system, the fluid system translating temperature into fluid pressure. The assembly further includes a hydraulically actuated high temperature switch which is adapted to be rendered responsive to a preselected temperature, as for example, 550.degree. to 600.degree., the switch being utilized to control an external circuit, as for example, the deactivation of a door lock solenoid. The switch assembly includes two fixed contacts, the positions of which are fixed in response to the position of a cam element. A pair of mating movable contacts are controlled by a temperature responsive assembly, which temperature responsive assembly reacts in response to the sensed temperature of an oven. The open and closed attitude of the pairs of movable contacts are determined by the relative differential between the set temperature and the sensed temperature, the open and closed attitude of one set of movable contacts being controlled in a cooking range of temperatures and the open and closed attitude of the other set of movable contacts are controlled in response to the sensing of a self-cleaning range of temperatures.
REFERENCES:
patent: 2917942 (1959-12-01), Jarrett et al.
patent: 3019667 (1962-02-01), Bann
patent: 3183329 (1965-05-01), Dahlgren
patent: 3197595 (1965-07-01), Weber
patent: 3232124 (1966-02-01), Weber
patent: 3344252 (1967-09-01), Hummel et al.
Broome Harold
King-Seely Thermos Co.
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