Abstract A radiant heater that provides uniform directional disposition of heat includes an elongated cylindrical tubular enclosure of heat resistant vitreous material pervious to infrared radiation, such as VYCOR. A preformed semicylindrical elongated support rod extends longitudinally in the enclosure and provides an uninterrupted generally flat support surface extending diametrically across the enclosure. A single helical resistance element of Kanthal is disposed in the portion of the enclosure not occupied by the support rod. The resistance element extends longitudinally of the support rod and enclosure and is in tangential and direct contact with the flat surface of the support. The support rod is formed of a compressed fibrous material having a low coefficient of thermal conductivity, such as a fibrous aluminum oxide and silicon dioxide composition known as FIBERFRAX.
A heater comprising: a. an elongated, substantially cylindrical tubular enclosure, b. the tubular enclosure made of heat resistant material which is pervious to infra red radiation, c. a preformed semicylindrical, elongated support for a resistance extending longitudinally in the enclosure, d. The support providing an uninterrupted generally flat support surface extending substantially diametrically across the tubular enclosure for receiving and supporting a resistance and being formed of a material which: A. has a low coefficient of thermal conduction, B. is fibrous and compressed, e. a single helical resistance disposed in a portion of the remainder of the enclosure not occupied by the support and extending longitudinally of the support and the enclosure, f. the resistance in generally tangential and direct contact with the flat surface of the support, g. the entire surface of the resistance, except at the points of tangential contact, being free to radiate through the tubular enclosure.
Claim 2
Dependent Claim
150 words
A heater comprising: a. an elongated, substantially cylindrical tubular enclosure, b. the tubular enclosure made of heat resistant material which is pervious to infra red radiation, c. a preformed semicylindrical, elongated support for a resistance extending longitudinally in the enclosure, d. The support providing an uninterrupted generally flat support surface extending substantially diametrically across the tubular enclosure for receiving and supporting a resistance and being formed of a material which: A. has a low coefficient of thermal conduction, B. is fibrous and compressed, e. a single helical resistance disposed in a portion of the remainder of the enclosure not occupied by the support and extending longitudinally of the support and the enclosure, f. the resistance in generally tangential and direct contact with the flat surface of the support, g. the entire surface of the resistance, except at the points of tangential contact, being free to radiate through the tubular enclosure.
Claim 3
Dependent Claim
17 words
The device according to claim 1 in which the support comprises fibrous aluminum oxide and silicon dioXide.