Thermal compensation method for a magnetic circuit having an oscillating circuit with an inductance coil
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United States of America Patent
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Nov 3, 1987
Grant Date -
N/A
app pub date -
Apr 12, 1985
filing date -
Apr 20, 1984
priority date (Note) -
Expired
status (Latency Note)
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Abstract
The present invention involves a thermal compensation procedure for magnetic circuits, such as those used in security devices detecting metallic masses, whose losses increase as a function of ambient temperature. According to the invention a body is placed in the immediate proximity of the magnetic circuit, the body being made of a material whose magnetic permeability is a decreasing function of temperature and whose Curie point equals the maximum possible ambient temperature.
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