Control system including a temperature-responsive variable optic

Details Control system including a temperature-responsive variable optic Control system including a temperature-responsive variable optic

1981-06-10

1982-10-12

Nelms, David C.

Radiant energy

Photocells; circuits and apparatus

Optical or pre-photocell system

356 43, 356 44, G01J 528, G01K 1112, G01D 530

Patent

active

043541054

ABSTRACT:
A temperature responsive device, such as a fuse or a temperature measuring apparatus, is disclosed including a temperature sensor having a light reflective (or light transmissive) characteristic which varies with temperature, and a device for receiving the light reflected from (or transmitted through) the sensor and to provide an output in accordance with the state of the characteristic. As shown, the sensor (perhaps an adhesive temperature indicator) is used as a fuse and, upon its color-change, it interrupts a switch 2 connecting a power source to a load the temperature of which the sensor senses.

REFERENCES:
patent: 3719789 (1973-03-01), Harnden, Jr.
patent: 4119845 (1978-10-01), Jaskolski et al.
patent: 4278349 (1981-07-01), Sander

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