Universal temperature control circuits

Details Universal temperature control circuits Universal temperature control circuits

1981-03-30

1983-09-13

Paschall, M. H.

Electric heating

Heating devices

With power supply and voltage or current regulation or...

219501, 219506, 219502, 330259, 330291, H05B 102

Patent

active

044044623

ABSTRACT:
Various electronic circuits are disclosed for controlling the temperature of an object by means of a resistive heating element. Some of the circuits include a digital display for displaying the actual temperature A plurality of different temperature sensors may be used, such, for example, as a resistive sensor, a thermocouple or a thermistor. The sensor may either have a positive or a negative temperature coefficient. Since most of the sensors are not strictly linear, different means are disclosed for compensating for their nonlinearity. Some of the control circuits feature a proportional control to which may be added an anticipatory control. Less sophisticated and more inexpensive circuits simply provide an on-off control.

REFERENCES:
patent: 3883753 (1975-05-01), Harrison, Jr. et al.
patent: 3946198 (1976-03-01), Foote
patent: 3946200 (1976-03-01), Juodikis
patent: 3968467 (1976-07-01), Lampen et al.
patent: 4167663 (1979-09-01), Granzow, Jr. et al.
patent: 4236064 (1980-11-01), Aiba

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