Circuitry for control of the temperature of a heating element ad

Details Circuitry for control of the temperature of a heating element ad Circuitry for control of the temperature of a heating element ad

1985-09-06

1987-05-26

Leung, Philip H.

Electric heating

Metal heating

Of cylinders

219 1061R, 219 1049R, 219503, H05B 606

Patent

active

046688510

ABSTRACT:
A circuit arrangement for control of the temperature of a heating element adapted for contact by a material to be heated includes a transformer wherein the secondary winding is a metal ring which is the heating element with a temperature detection winding provided on the core of the transformer. An electronic switch and current sensing means are connected to the primary. A comparator, which receives input signals from the current sensing means and temperature detection winding, is operatively connected to the electronic switch to control its operation.

REFERENCES:
patent: 2349569 (1944-05-01), Wilson
patent: 3686460 (1972-08-01), Lamparter et al.
patent: 3743808 (1973-07-01), Kasper
patent: 4112286 (1978-09-01), Alderman et al.
patent: 4317979 (1982-03-01), Frank et al.
patent: 4350861 (1982-09-01), Pouillange et al.
patent: 4356371 (1982-10-01), Kiuchi et al.

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