Thermostat having simple battery level detection

Details Thermostat having simple battery level detection Thermostat having simple battery level detection

1991-09-30

1993-08-24

Wayner, William E.

Automatic temperature and humidity regulation

Thermostatic

With indicator or alarm

136293, 236 46R, 324436, 340636, G05D 2300, G08B 2100

Patent

active

052381846

ABSTRACT:
A thermostat having a simple battery level detection circuit. The output of an oscillator, having a frequency dependent upon the battery level, is compared to the output of a battery level independent time base. If the two outputs are not in a predetermined relationship, all connected HVAC equipment is shut off.

REFERENCES:
patent: 4163193 (1979-07-01), Kamiya
patent: 4506827 (1985-03-01), Jamieson et al.
patent: 4816768 (1989-03-01), Champlin

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