Portable blackbody furnace

Electric heating – Heating devices – Combined with container – enclosure – or support for material...

Reexamination Certificate

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Details

C219S385000, C219S407000, C373S111000, C373S117000, C374S002000

Reexamination Certificate

active

07148450

ABSTRACT:
The present invention discloses a portable blackbody furnace comprising a metallic body, a cylindrical cavity with a tapered end in the metallic body, a shielding plate positioned at an open end of the cylindrical cavity, at least a first heaters positioned in the shielding plate, a plurality of second heaters positioned around the metallic body, and a plurality of thermometers positioned in the metallic body. Preferably, the heat capacity of the metallic body is larger than 200 Joules/K, and has radial thickness larger than 5 mm. There are grooves formed on the outer wall of the metallic body, and the second heaters are heating wires embedded inside the grooves. In addition, the flow direction of the current between two adjacent heating wires is opposite to eliminate the magnetic field generated from the current flow.

REFERENCES:
patent: 4435092 (1984-03-01), Iuchi
patent: 5608838 (1997-03-01), Brookley
patent: 5988874 (1999-11-01), Rohner
patent: 6365877 (2002-04-01), Chen et al.
patent: 6467952 (2002-10-01), Morisaki et al.
patent: 03250642 (1991-11-01), None
“Encyclopedia of Science & Technology”, McGraw-Hill Publishing Co., Heat Radiation, p. 514 (1982).

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