Load control circuit with timed interruption

Details Load control circuit with timed interruption Load control circuit with timed interruption

1980-07-10

1982-07-06

Pellinen, A. D.

Electricity: power supply or regulation systems

External or operator controlled

Phase controlled switching using electronic tube or a three...

307141, 315360, 323326, H05B 3132

Patent

active

043385621

ABSTRACT:
The control circuit is preferably provided in an integral unit with a momentary on-off switch, preferably inside a switch housing box and adapted to replace a common wall switch to provide for the automatic turn-off of the light or other load operated by the switch after a presetable period of time. The circuit is constructed so as not to require a third wire (usually a power lead) at the unit. The use of low power logic circuit controls, employing preferably CMOS chips enables use of a capacitor storage element of manageable size, with very low power consumption of the circuit in its "off" state. The "on" duration of the light is adjustable over a suitable time range and the circuit is further characterized by a "flashing" period preceding total turn-off.

REFERENCES:
patent: 3939361 (1976-02-01), Aidala et al.
patent: 3973135 (1976-08-01), Scott
patent: 4204149 (1980-05-01), Cleary et al.
patent: 4270058 (1981-05-01), Schornack

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