Heating apparatus

Details Heating apparatus Heating apparatus

1981-05-29

1984-02-21

Paschall, M. H.

Electric heating

Heating devices

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

250339, 356 43, 219497, 219 1055B, H05B 102

Patent

active

044332327

ABSTRACT:
Disclosed is a heating apparatus which is capable of heating an object to be heated placed in its heating chamber until the color of the surface of the object changes to a given extent, and in which the wavelength of light of visible spectrum range which is emitted from a light source to illuminate the surface of the object placed in the heating chamber and reflected therefrom is sensed by a color sensor to judge the degree of change in the hue of the surface of the object on the basis of the wavelength sensed by the color sensor to thereby control the heating operation on the basis of the result of judgement.

REFERENCES:
patent: 3211908 (1965-10-01), Leibowitz
patent: 3654809 (1972-04-01), Worden et al.
patent: 3922550 (1975-11-01), Crowley et al.
patent: 4180722 (1979-12-01), Clewans
patent: 4245148 (1981-01-01), Gisske et al.
patent: 4363957 (1982-12-01), Tachikawa et al.

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