Solenoid protection method and apparatus
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United States of America Patent
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Issued Date -
Aug 18, 2005
app pub date -
Feb 4, 2005
filing date -
Feb 13, 2004
priority date (Note) -
Abandoned
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Abstract
An overtemperature protection method and apparatus for a solenoid applies the property of thermal sensitivity of positive temperature coefficient resistors (PTCRs) to prevent heat-induced failures, even in the absence of overcurrent conditions, while effectively preventing nuisance tripping.
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