Tracking temperature controller apparatus

Details Tracking temperature controller apparatus Tracking temperature controller apparatus

1982-07-02

1985-09-03

Hart, Douglas

Heat exchange

Movable heating or cooling surface

Rotary drum

165 30, 236 46F, G05D 2324

Patent

active

045386722

ABSTRACT:
Apparatus for controlling temperature in accordance with a source temperature that includes a clock pulse generating circuit that triggers each of first and second mono-stable multivibrators which provide opposite phase pulse outputs having durations controlled by the R-C time of thermistor sensing components. A retriggerable monostable multivibrator is then controlled in response to pulse duration difference to provide toggle energization of heating and cooling sources.

REFERENCES:
patent: 3149293 (1964-09-01), Farkas
patent: 3599864 (1971-08-01), Liddle
patent: 3768545 (1973-10-01), Wills
patent: 3826305 (1974-07-01), Fishman
patent: 3942718 (1976-03-01), Palmieri
patent: 4199023 (1980-04-01), Phillips
patent: 4237420 (1980-12-01), Ebihara et al.
patent: 4333519 (1982-06-01), Shafrir et al.

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