Electric heating – Heating devices – With power supply and voltage or current regulation or...
Patent
1986-02-14
1987-09-08
Paschall, M. H.
Electric heating
Heating devices
With power supply and voltage or current regulation or...
219501, 219413, 323366, H05B 102
Patent
active
046925988
ABSTRACT:
A temperature controller for an incubator or an oven for keeping the temperature in a chamber at a constant level by controlling the energization of heaters. The temperature controller is provided with two temperature control systems, each of which comprising a sensor for detecting the temperature in the chamber, a thermostat for setting a temperature which is aimed at in the chamber, an error amplifier for detecting a difference between both output levels of the sensor and temperature setting means, and an electric power control circuit for controlling the energization of the heaters in correspondence with the output pulse-length of the circuit.
REFERENCES:
patent: 4307775 (1981-12-01), Saunders et al.
patent: 4309592 (1982-01-01), Le Boeuf
patent: 4320285 (1982-03-01), Koether
patent: 4393300 (1983-07-01), Proctor
Kobayashi Nobutoshi
Yoshida Naoki
Gauthier Maurice E.
Paschall M. H.
Yamato Scientific Co., Ltd.
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