Tubular heating element with insulating core
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United States of America Patent
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Sep 26, 1995
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N/A
app pub date -
Feb 14, 1994
filing date -
Feb 14, 1994
priority date (Note) -
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Abstract
A tubular heating element (10) having a metal tube (12) filled with a ceramic material (14). The metal tube has a near zero or slightly positive temperature coefficient of resistance. In an alternative embodiment, a wire (16) is coaxially supported within the metal tube (12) by the ceramic material (14). This wire may be used to stiffen the tubular heating element (10) or may be used as an electrical conductor.
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