Sheathed resistance heater

摘要

PCT No. PCT/JP82/00172 Sec. 371 Date Jan. 18, 1983 Sec. 102(e) Date Jan. 18, 1983 PCT Filed May 17, 1982 PCT Pub. No. WO82/04172 PCT Pub. Date Nov. 25, 1982.This invention relates to a sheathed resistance heater which comprises a heating wire (2) received in a metallic pipe 3 and electrically insulating powder (4) packed in the pipe. A metallic powder of the specific type is added to the electrically insulating powder (4), by which the heating wire (2) has a prolonged life by suppressing metal components in the wire from evaporating, the heater being widely applicable for domestic and industrial purposes.