Patent ID: 9501050
Filing Date: 2016-11-22
CPC Classification: G05B,G05D,G05F

Claim Text:
1. Battery-powered wall thermostat adapted to be mounted on a wall of a comfort space and coupled by a set of thermostat wires to a comfort air apparatus that provides heated or cooled air to said comfort space when the temperature of air in said comfort space reaches a temperature setpoint selected by an occupant of said comfort space; and comprising a housing adapted to be mounted on the wall of said comfort space; a temperature sensing element in or on said housing; a selector mechanism configured to permit the occupant to adjust said temperature setpoint; a DC power source within said housing comprised of one or more power cells providing battery power at a battery voltage V a display on said housing that is configured so as to show the temperature within the comfort space and the temperature setpoint, and including a feature for providing a low-battery alert message; a microprocessor within said housing adapted to control actuation of said comfort air apparatus when the comfort space temperature reaches a temperature based on said temperature setpoint and to control deactuation of said comfort air apparatus when the comfort air temperature changes from said temperature setpoint by a predetermined swing amount; said microprocessor including at least one latching relay having ON and OFF inputs connected respectively to respective output ports of said at least one pair of output terminal ports of the microprocessor, said latching relay having a contact mechanism to connect thermostat power to one wire of said set of thermostat wires in response to a pulse from one output terminal port of said pair of output terminal ports and to disconnect thermostat power from said one wire in response to a pulse from the other output terminal port of said at least one pair of output terminal ports; said microprocessor further including a battery voltage monitoring functionality to compare the battery voltage V said microprocessor further including a temperature setpoint altering functionality operative when the battery voltage V