H - Electricity – 01 – H
Patent
H - Electricity
01
H
73/61, 73/64
H01H 47/26 (2006.01) G01K 7/02 (2006.01) H01H 53/015 (2006.01)
Patent
CA 1219466
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 eletro-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.
452338
Gautheret Georges
Goudreau Gage Dubuc
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