Automatic temperature and humidity regulation – Motors – Electric
Patent
1979-09-26
1982-02-09
Wayner, William E.
Automatic temperature and humidity regulation
Motors
Electric
236 94, 62126, 338201, G05D 1500, G05D 2300
Patent
active
043146660
ABSTRACT:
Adjustable electronic temperature control, having a bridge circuit with arms and at least one diagonal connected between points of the bridge, a thermistor for sensing temperature connected in one of the arms, a control circuit to be activated by the temperature control, a circuit for activating an indicating and safety device, at least two amplifiers for switching the control circuit and indicating and safety circuit on and off, means connected in the at least one diagonal for supplying a control voltage to the amplifiers, a plurality of resistors connectible in parallel in another arm for setting a setpoint temperature in the temperature control, the resistors having values increasing in a binary code, and at least one coding switch for selectively connecting the resistors in parallel in accordance with given temperature steps.
REFERENCES:
patent: 3434041 (1969-03-01), Nordahl et al.
patent: 3616846 (1971-11-01), Wills
patent: 3918636 (1975-11-01), Dawson
patent: 3942718 (1976-03-01), Palmieri
patent: 4169357 (1979-10-01), Kelley
patent: 4187093 (1980-02-01), Boratgis et al.
Bosch-Siemens Hausgerate GmbH
Greenberg Laurence A.
Lerner Herbert L.
Tanner Harry
Wayner William E.
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