Self-energized commutation device sensitive to a temperature gra

Details Self-energized commutation device sensitive to a temperature gra Self-energized commutation device sensitive to a temperature gra

1984-04-20

1986-04-22

Yasich, Daniel M.

Thermal measuring and testing

Temperature measurement

Composite temperature-related paramenter

60329, 307117, 374144, G01K 702, G01K 1300, H01H 4700

Patent

active

045838674

ABSTRACT:
A device, for assuring selective commutation of one or the other of two electric measuring circuits to a single electric exploitation circuit as a function of the temperature gradient present between two distinct points of reference, has a first thermocouple placed at the first point of reference; a second thermocouple placed at a second point of reference, connected in opposition to the first thermocouple in order to deliver a differential electro-motive force (.DELTA.e) of which the value and the sign are a function of the value and sense of the gradient; and commutation means sensitive to this electro-motive force and fed solely by the energy produced by the two thermocouples. The commutation means includes a relay fed by the differential electro-motive force.

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