Method of controlling the temperature of an electrically heated

Details Method of controlling the temperature of an electrically heated Method of controlling the temperature of an electrically heated

1979-02-08

1983-03-22

Envall, Jr., Roy N.

Electric heating

Heating devices

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

219493, 219491, 219494, 219512, 1565839, H05B 102

Patent

active

043777384

ABSTRACT:
The temperature of an electrically heated element is controlled by applying a current until the element reaches a threshold temperature, preferably determined by the expanded length of the elements, and then applying a predetermined voltage-current condition for a selected period of time. This is followed by repeated applications of such voltage-current conditions in response to the cooling of the heating element back to the threshold temperature.

REFERENCES:
patent: 2898436 (1959-08-01), Lawler
patent: 3627983 (1971-12-01), Pickering
patent: 3679518 (1972-07-01), Andler et al.
patent: 3681569 (1972-08-01), Schwarz
patent: 3751632 (1973-08-01), Kavranen
patent: 3813516 (1974-05-01), Kudsi et al.
patent: 3858141 (1974-12-01), Lackey
patent: 3912575 (1975-10-01), Zelnick

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