Automatic temperature and humidity regulation – With timing element – Timer other than clock
Patent
1975-10-30
1977-03-29
Wayner, William E.
Automatic temperature and humidity regulation
With timing element
Timer other than clock
236 47, 337302, 236 68B, G05D 2332
Patent
active
040144992
ABSTRACT:
An improved temperature control apparatus includes a main control unit of the on-off type which is utilized to maintain a room at a relatively high temperature during the day and a secondary control unit which is utilized to maintain the room at a relatively low temperature during the night. When it is desired to change from the high day temperature to the low night temperature, an actuator button on the secondary control unit is manually depressed. Depressing the actuator button moves a relay contact to complete a holding circuit. This holding circuit includes a battery which supplies energy to maintain the relay actuated. When the air conditioning system has been operated to maintain the relatively low night temperature for the desired length of time, the battery will have been discharged to such an extent that it is no longer effective to hold the relay actuated. When this occurs, the relay returns to an unactuated or normal condition and the room temperature is maintained at the relatively high day temperature under the influence of the main control unit. In order to facilitate installation of the secondary control unit with existing main control units without placing additional wiring in the wall of a building, the battery in the secondary control unit is charged by a relatively small flow of current which is conducted through existing wiring for the main control unit.
REFERENCES:
patent: 3917165 (1975-11-01), Cross
patent: 3948441 (1976-04-01), Perkins et al.
patent: 3964677 (1976-06-01), Schalow et al.
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