Apparatus for conserving energy in a building

Details Apparatus for conserving energy in a building Apparatus for conserving energy in a building

1975-07-30

1977-05-03

Claffy, Kathleen

Communications: electrical

Land vehicle alarms or indicators

Internal alarm or indicator responsive to a condition of the...

340147R, H04M 1100

Patent

active

040216152

ABSTRACT:
Apparatus for turning off power-consuming appliances in rooms of a building having a private automatic branch exchange telephone system includes computer-controlled means at the exchange central periodically to apply short bursts of audio-frequency oscillations to telephone lines going to rooms in which power can be conserved. Detecting means in each room connected to the room telephone line provide an output on receipt of a burst which operates a line relay in the room, disconnecting power from the appliance in the room, for a predetermined time period greater than the time period between the periodic application of bursts at the exchange central.

REFERENCES:
patent: 2516361 (1960-07-01), Barker
patent: 3308239 (1967-03-01), Waldman
patent: 3553376 (1971-01-01), Bogaart
patent: 3588357 (1971-06-01), Sellari
patent: 3842218 (1974-10-01), DeLuca
patent: 3859462 (1975-01-01), Saxon
patent: 3912882 (1975-10-01), Beerbaum

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