Indication of low battery voltage condition by altering of tempe

Details Indication of low battery voltage condition by altering of tempe Indication of low battery voltage condition by altering of tempe

1993-03-25

1993-10-12

Wayner, William E.

Automatic temperature and humidity regulation

With timing element

Timer other than clock

165 12, F23N 520

Patent

active

052518132

ABSTRACT:
In a digital thermostat powered solely by batteries, when the battery voltage drops to a predetermined value, the thermostat effects a visual indication of the existence of a low voltage condition. If the batteries are not replaced within a predetermined time period thereafter, and the battery voltage remains adequate to operate the thermostat, the temperature setpoint is automatically altered by being lowered, if in the heating mode, or being raised, if in the cooling mode. The change in room temperature resulting from the change in temperature setpoint should prompt the user to replace the batteries. By proper manipulation of user operable means, the user can subsequently cancel the altered temperature setpoint and re-establish the desired temperature setpoint so as to provide for normal thermostat operation for a predetermined time period during which the batteries can be replaced.

REFERENCES:
patent: 4428528 (1984-01-01), Renault
patent: 4506827 (1985-03-01), Jamieson et al.

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