Electric heating – Heating devices – With power supply and voltage or current regulation or...
Patent
1983-04-20
1985-01-15
Paschall, M. H.
Electric heating
Heating devices
With power supply and voltage or current regulation or...
219502, 219508, 219501, 236 46R, H05B 102
Patent
active
044939833
ABSTRACT:
A device for incorporation into the power supply circuit of an electrical apparatus comprising (a) a switch which is movable from one condition to another on application of power to the switch and which is held in the moved condition, as long as power is applied to the switch; (b) a signal emitter adapted to emit a power signal of short duration and being connected to the switch so that on emission of the power signal the switch will be moved to the other condition for the duration of the power signal; and (c) a current detector capable of detecting when a current flows in a line and being connected to the switch to supply power thereto when current flows in the line. The current detector may be a light emitting diode (L.E.D.) and a light detector arranged to transmit current to a relay switch coil which is electrically connected to the line by a current transformer.
REFERENCES:
patent: 2266252 (1941-12-01), Osterheld
patent: 4238672 (1980-12-01), Siess
patent: 4245148 (1981-01-01), Gisske et al.
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