Time variable thermostat

Details Time variable thermostat Time variable thermostat

1976-06-09

1978-05-30

Wayner, William E.

Automatic temperature and humidity regulation

With timing element

Timer other than clock

3071414, F23N 520

Patent

active

040919935

ABSTRACT:
The invention is a time variable thermostatic device adapted for direct connection into a low voltage, two-wire, alternating current control circuit of a heating or cooling unit arranged to vary the temperature set point of a thermostat at selected times to control the operation of the heating or cooling unit. Circuit means including a transformer having primary and secondary windings interconnect in the two-wire control circuit a thermostat having a thermostatic switch, a starting relay or gas valve actuator and a timing means having a timing means that is a multiple of the frequency of the AC voltage in the control circuit together with mechanical means for changing the temperature set point at the desired time of day. The circuit permits actuation of the starting relay and operation of the heating or cooling unit only when the thermostatic switch is closed.

REFERENCES:
patent: 3599863 (1971-08-01), Pinckaers
patent: 3620448 (1971-11-01), Nelson
patent: 3940441 (1976-04-01), Perkins et al.

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