METAL DETECTOR SENSOR HEAD
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United States of America Patent
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Issued Date -
Sep 29, 2011
app pub date -
Mar 26, 2010
filing date -
Mar 24, 2010
priority date (Note) -
Abandoned
status (Latency Note)
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Abstract
A metal detector includes means for reducing the induction of eddy currents in conductive elements of a sensor head. The aim of this invention is to remove the effect of small pieces of conductive material, located within or close to the sensor head, being seen as sought targets as the sensor head is moved over magnetic matrix. The means is to surround the conductive material with material with high magnetic permeability and low losses in a time-varying magnetic field, say low-loss ferrite. This will prevent the reflected field from illuminating the conductive material so eddy currents are not generated.
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