Fail-safe circuit

Details Fail-safe circuit Fail-safe circuit

G - Physics

01

F

348/39

G01F 23/00 (2006.01) H02H 7/00 (2006.01)

Patent

CA 1060981

ABSTRACT OF THE DISCLOSURE An electric system normally responsive to radiation over a path traversed by a body of material. An auxiliary radiation source generations a continuous signal through the portion of the circuit monitored for failure. The continuous signal opposes deenergization of the system relay during the period the material blocks normal radiation to the system and while the monitored circuit is operative.

262888

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