Control circuits for electromagnetic coupling apparatus

Details Control circuits for electromagnetic coupling apparatus Control circuits for electromagnetic coupling apparatus

1985-03-07

1987-03-10

Gellner, Michael L.

Electricity: electrical systems and devices

Control circuits for electromagnetic devices

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

192 84R, 361196, 361203, F16D 2716

Patent

active

046494588

ABSTRACT:
The control circuit for use with an electromagnetic coupling apparatus comprises a timer started when a power source switch is closed, an oscillator started by the switch and stopped by the timer, and a drive circuit which intermittently passes current through an exciting coil of the electromagnetic coupling apparatus in accordance with the oscillation output of the oscillator and continuously passes current through the exciting coil when the oscillation output is stopped.

REFERENCES:
patent: 3953867 (1976-04-01), Kondo
patent: 4012673 (1977-03-01), Sarrem et al.
patent: 4044272 (1977-08-01), Darrow
patent: 4377223 (1983-03-01), Salsakiyama et al.
patent: 4509091 (1985-04-01), Booth

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