04698583 is referenced by 178 patents and cites 10 patents.

Method for monitoring the electrical integrity of a heater and a novel heater for use in such a method. The heater includes an elongate heating member; an insulating jacket which encloses the heating member; a first electrically conductive member which surrounds the insulating jacket; a separating and insulating member which surrounds the first conductive member; and a second electrically conductive member which surrounds the first conductive member and is separated and insulated therefrom by the separating member. The method includes the step of testing the electrical relationship between the first and second electrically conductive members.

Title
Method of monitoring a heater for faults
Application Number
6/716780
Publication Number
4698583
Application Date
March 26, 1985
Publication Date
October 6, 1987
Inventor
Chester L Sandberg
Palo Alto
CA, US
Agent
Herbert G Burkard
Timothy H P Richardson
Assignee
Raychem Corporation
CA, US
IPC
H02H 7/00
H05B 1/02
G01R 31/12
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