Fuel valve latch out system

Details Fuel valve latch out system Fuel valve latch out system

1982-07-06

1984-06-19

Moose, Jr., Harry E.

Electricity: electrical systems and devices

Control circuits for electromagnetic devices

For relays or solenoids

431 67, H01H 4722

Patent

active

044555890

ABSTRACT:
An electrical control system including a source of electrical power and an electrical load coupled together by a power switch having alternate circuit open and circuit closed conditions. A closure means activates the power switch to a circuit closed condition to produce power transmission between the source and the load in response to a closure signal produced by a condition responsive control circuit. Connected in series with the power switch is a protective switch also activated from a circuit open to a circuit closed condition in response to the closure signal. A sensing circuit produces a fault signal in response to a closed condition of the power switch and a simultaneous circuit open condition of the protective switch.

REFERENCES:
patent: 3584988 (1971-06-01), Hirsbrunner et al.
patent: 3600117 (1971-08-01), Hirsbrunner
patent: 3900770 (1975-08-01), Kaufman
patent: 4298335 (1981-11-01), Riordan et al.

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