Energy conservation system

Details Energy conservation system Energy conservation system

1976-07-01

1977-07-19

Envall, Jr., R. N.

Electricity: electrical systems and devices

Control circuits for electromagnetic devices

For relays or solenoids

307129, H01H 4720

Patent

active

040371417

ABSTRACT:
An energy conservation system is disclosed wherein power in a given area, such as in a hotel or other room, is controlled by means of an ultrasonic sound transmitter and a plurality of ultrasonic sound receivers, each receiver controlling power for a separate power outlet. Upon entering the room, a key is inserted into a key receptacle to activate the transmitter and thereby cause the receivers to couple power to the power outlets in the room. When the key is withdrawn from the key receptacle, the transmitter signals the receivers to decouple power from the power outlets.

REFERENCES:
patent: 3440347 (1969-04-01), Spencer et al.
patent: 3586919 (1971-06-01), Harris
patent: 3590271 (1971-06-01), Peters

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