Self-regulating heater with integral induction coil and method of manufacture thereof
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United States of America Patent
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Feb 11, 1992
Grant Date -
N/A
app pub date -
Dec 28, 1990
filing date -
Dec 28, 1990
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A self-regulating heater including a body of electrically non-conductive material, an induction coil embedded within the body, lossy heating particles dispersed within the body and connection terminals for supplying power to the induction coil. The lossy heating particles produce heat when subjected to an alternating magnetic field produced by the induction coil. The lossy heating particles have a Curie temperature approximately equal to a substantially constant auto-regulation temperature at which the body is heated. The connection terminals supply power to the induction coil so that the induction coil can produce an alternating magnetic field of sufficient intensity to cause the lossy heating particles to heat the body to the auto-regulation temperature. A method of manufacturing a self-regulating heater including providing a body of an electrically non-conductive material, providing an induction coil embedded within the body, providing lossy heating particles dispersed within the body, and providing connection terminals for supplying power to the induction coil. The induction coil can be embedded within the body by molding the material containing lossy heating particles around the induction coil.
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