Electric timer switch

Details Electric timer switch Electric timer switch

1974-10-02

1976-02-17

Envall, Jr., R. N.

H03H 930

Patent

active

039393844

ABSTRACT:
An electronic timer switch capable of controlling the operation of a unit, such as an air conditioning apparatus, according to a preset time schedule even when the unit is switched on.

REFERENCES:
patent: 3688130 (1972-08-01), Granieri
patent: 3728588 (1973-04-01), Jones
patent: 3774082 (1973-11-01), Chang
patent: 3814948 (1974-06-01), Schuchmann et al.

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