Nuclear measuring gauge with automatic detection of source depth
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United States of America Patent
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Jun 7, 1988
Grant Date -
N/A
app pub date -
Aug 27, 1986
filing date -
Aug 27, 1986
priority date (Note) -
Expired
status (Latency Note)
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Abstract
The present invention provides an apparatus for detecting the depth position of the source rod of a portable nuclear measuring gauge having a housing with the elongate source rod extending vertically therethrough and mounted for vertical sliding movement to various depth positions. The apparatus comprises an elongate variable resistance element extending axially parallel to said source rod, means for slideably engaging the elongate variable resistance element as the source rod is moved to various depth positions so as to vary the resistance of said variable resistance element, and means electrically connected to said variable resistance element for sensing the changes in resistance thereof and converting such changes into an indication of the depth position of the source rod.
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