Carl G Carroll

US Patent:

52147401, May 25, 1993

Filed:

Jan 31, 1992

Appl. No.:

7/829769

Inventors:

Carl W. Carroll - Charleston TN

International Classification:

H05B 102
H05B 306
F24H 306
F28F 1900

US Classification:

392481

Abstract:

An apparatus for electrically heating non-flammable gases, supplied to an applicator gun comprises an elongated housing having an elongated electric heater located centrally and longitudinally therein and a metallic helically coiled tube spaced from and surrounding the heater. The coiled tube is substantially co-extensive in length with the heater and has an inlet end and an outlet end connectable to an applicator gun. An elongated preheating tubing section is disposed length-wise of and surrounded by the helically coiled tube in spaced heat exchange relation with the electric heater. The preheating tubing section has an inlet end connectable to a supply of non-flammable gas and an outlet end connected to the inlet end of the coiled tube. A temperature responsive sensing means is positioned at the inlet end of the coiled tube in direct contact with the non-flammable gas flowing into the coiled tube from the preheating tubing section and an electrical control means operatively connected to the temperature responsive means controls the degree of energization of the heater in direct response to the actual temperature of the non-flammable gas at the inlet end of the coiled tube to vaporize any liquid present in the non-flammable gas flowing through the coiled tube before transfer to the an applicator gun.