Apparatus for heating an air stream

Electric heating – Heating devices – With power supply and voltage or current regulation or...

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219400, B01D 1508

Patent

active

046879099

ABSTRACT:
An apparatus for heating an air current, includes a heating coil being heated until it glows providing radiation in a given region, a device for conducting an air current past the heating coil, an electronic heating power control device connected to the heating coil, and a control sensor connected to the control device in the form of a light radiation sensitive circuit element disposed in the given region.

REFERENCES:
patent: 2187613 (1940-01-01), Nichols
patent: 2502844 (1950-04-01), Hildreth
patent: 3622138 (1971-11-01), Kostyal
patent: 3781504 (1973-12-01), Harnder
patent: 3882363 (1975-05-01), Misencik
patent: 4420679 (1983-12-01), Howe
patent: 4455472 (1984-06-01), Moss
patent: 4484064 (1984-11-01), Murray
patent: 4494314 (1985-01-01), Gell

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