Electric thermal switch valve

Details Electric thermal switch valve Electric thermal switch valve

1977-02-18

1979-02-13

Wayner, William E.

Automatic temperature and humidity regulation

Snap-acting

Including a permanent magnet

123119A, 236 68R, 236 87, 236101C, G05D 2310

Patent

active

041391519

ABSTRACT:
An electric-thermal switch valve has a body with a first port and at least one second port with a temperature operated valve means including a valve seat and a bimetal element, responsive to temperature, positioned to cooperate with the valve seat to control flow between the first port and the second port. An electrical heating means, including a semi-conductor, having a positive temperature coefficient of resistance, positioned in the body, is used to heat the bimetal element when energized whereby switching of the bimetal element at a predetermined temperature, will occur as the combined effect of heat sensed by the body and the heat generated by the electrical heating means.

REFERENCES:
patent: 3856259 (1974-12-01), Doherty, Jr.
patent: 4016853 (1977-04-01), Bible
patent: 4026464 (1977-05-01), Doherty, Jr.
patent: 4029257 (1977-06-01), Jenkins et al.
patent: 4032071 (1977-06-01), Imoto

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