Power control unit

Details Power control unit Power control unit

1984-02-13

1985-10-15

Paschall, M. H.

Electric heating

Heating devices

With power supply and voltage or current regulation or...

219493, 219507, 219334, 307510, H05B 102

Patent

active

045476578

ABSTRACT:
A power controller for placement between a source of electricity and a user of electricity such as heaters for heating thermoplastic material. The controller comprises a normally closed switch allowing electrical communication between the source and user. An electrical control circuit including a coil which is connected to the normally closed switch.
The control circuit further includes a switch assembly operable between an on and off condition. The switch assembly prevents or allows the energization of the coil when in the on or off condition, respectively. A first timing assembly causes the switch assembly to be in the on condition for a first selected duration after energization of the control circuit. A second timing assembly causes the switch assembly to be intermittently placed in an on condition after energization of the control circuit.

REFERENCES:
patent: 3397323 (1968-08-01), Hirsch
patent: 4317987 (1982-03-01), Fieldman
patent: 4378486 (1983-03-01), Yunik et al.
patent: 4413172 (1983-11-01), Jones

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