Patent ID: 7218201

Claim:
A high-voltage resistor element comprising: a cylindrical outer tube made of metal and having an outer peripheral surface that is without any spiral fin; electrode rods inserted respectively from both ends of said outer tube; a resistive heat-generating wire wound spirally and extending between inner ends of said electrode rods; a solidified insulating material filling a space within an internal surface of said outer tube so as to encase said resistive heat-generating wire and said electrode rods; cylindrical insulating sleeves being without any fin; said insulating sleeves extractably encasing and being anchored at respective portions of the outer peripheral surface of said cylindrical outer tube, said respective portions being adjacent to the both ends of the outer peripheral surface of said outer tube; and said insulating sleeves being positioned between said outer tube and one or more supporters and so that said outer said high-voltage resistor element is supported by the one or more supporters.