Temperature sensing switch with an optical sensor

Details Temperature sensing switch with an optical sensor Temperature sensing switch with an optical sensor

1979-05-14

1981-03-10

Yasich, Daniel M.

Radiant energy

Photocells; circuits and apparatus

Optical or pre-photocell system

73343R, G01D 534

Patent

active

042556554

ABSTRACT:
A temperature sensing switch is disclosed which has a needle moving in response to the temperature within a translucent case. On the outside of this case are mounted one or a plurality of movable needle position detectors, in each of which a light emitter sends a beam of light through the case, to be picked up by a light detector. When the needle interrupts this beam of light, the light detector emits a signal. By moving these position detectors with respect to the case, the temperatures for production of these signals can be adjusted.

REFERENCES:
patent: 2954479 (1960-09-01), Cibelius, Jr.
patent: 2979628 (1961-04-01), Gaon
patent: 3495777 (1970-02-01), Evalds et al.
patent: 3788795 (1974-01-01), Zeitlin
patent: 3931514 (1976-01-01), Patterson
patent: 4087684 (1978-05-01), Mott

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