Fail-safe control circuit, particularly for heating apparatus

Details Fail-safe control circuit, particularly for heating apparatus Fail-safe control circuit, particularly for heating apparatus

1979-05-08

1981-03-24

Moose, Jr., Harry E.

Electricity: electrical systems and devices

Control circuits for electromagnetic devices

Systems for magnetizing, demagnetizing, or controlling the...

361104, 361205, H02H 308

Patent

active

042584043

ABSTRACT:
A fail-safe control circuit for supplying the electrical power for operating a safety stop member, such as an electromagnetic valve, in response to low power information, wherein any failure of a component causes the safety stop member to close.
The energy taken from the alternative current supply network by the periodic charging of a capacitor is transmitted to a load by the energizing of a thyristor. The spontaneous energizing of the thyristor causes the appearance of an overcurrent disabling the device.
Applications to combustion, premises, medical monitoring devices.

REFERENCES:
patent: 3381146 (1968-04-01), Egan
patent: 3671815 (1972-06-01), Eberle et al.
patent: 4138708 (1979-02-01), Takeshima

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