Electric heating – Heating devices – Combined with container – enclosure – or support for material...
Patent
1978-07-26
1980-09-02
Envall, Jr., Roy N.
Electric heating
Heating devices
Combined with container, enclosure, or support for material...
219375, 219370, 338225, 338280, 338297, 423445, 423449, 252502, 252510, H05B 314, C01B 3100
Patent
active
042208467
ABSTRACT:
A body of a specially prepared, porous vitreous carbon which does not crack or substantially change in electrical resistance with time when heated to elevated temperatures in air and which is used in a method or apparatus to heat a fluid stream flowing in the pores of the body as a result of natural convection or pumping of the fluid is described. The body is composed of electrically conductive rigid, interconnected and multidirectional continuous strands of vitreous carbon forming a rigid porous, three dimensional skeletal structure. The body as an electrical resistance element has current conductive paths between at least two regions; is shaped to provide particular cross-sections along the conductive paths; and has electrical connector means attached at the regions of the body so that current can be distributed through the body. The electrical resistance element is particularly useful as a heating element for air flowing through the pores in electrically powered room space heaters, hair dryers, hand dryers and the like and can also function as a self-cooling resistor. In a like manner, electromagnetic energy is used to heat a body of the porous vitreous carbon so as to heat a fluid stream flowing through the pores.
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Brochure-"Reticulated Virtreous Carbon (In Exciting New Material)" (1976), Chemotronics International Inc.
Franklin Charles H.
Rice Warren A.
Torbett Christopher J.
Vinton Clarence S.
Envall Jr. Roy N.
Roskoski Bernard
The Fluorocarbon Company
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