Fail-safe circuit

Details Fail-safe circuit Fail-safe circuit

1975-10-03

1977-05-24

Hohauser, Herman

Electrical transmission or interconnection systems

Switching systems

Condition responsive

73290R, 340244R, 361194, G01F 2300

Patent

active

040257983

ABSTRACT:
An electric system normally responsive to radiation over a path traversed by a body of material. An auxiliary radiation source generates 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.

REFERENCES:
patent: 3275898 (1966-09-01), Rosso et al.

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