Boots – shoes – and leggings
Patent
1986-12-29
1989-01-17
Chin, Gary
Boots, shoes, and leggings
364483, 165 14, 236 91D, F23N 520, G06F 1520
Patent
active
047991763
ABSTRACT:
A programmable electronic digital thermostat provides improved control of a temperature conditioning system for varying load conditions in order to maintain the ambient temperature within a predefined range of a scheduled set temperature while minimizing ambient temperature overshoots and undershoots. The thermostat includes an improved power supply circuit for simply and effectively providing its operating power utilizing an external alternating current power source of the temperature conditioning system and utilizing conventional existing wiring. The thermostat includes a microprocessor for storing a program and for performing logical control operations in accordance with the stored program and a temperature sensing circuit that provides a pulse width modulated PWM signal representative of ambient temperature in response to an enable control signal from the microprocessor.
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Chin Gary
Harper-Wyman Company
Mattson Brian M.
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