Method and apparatus for testing magnetic proximity detectors on ski lifts
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United States of America Patent
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Apr 13, 2004
Grant Date -
N/A
app pub date -
Mar 3, 2003
filing date -
Mar 3, 2003
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A device for testing a cable deroped magnetic proximity detector positioned adjacent a cable sheave or sheave assembly on a cable operated ski lift. A sleeve of non-ferromagnetic material is temporarily secured coaxially over the steel lift cable and the sleeve is dimensioned in length and thickness in amounts sufficient to raise the cable simultaneously away from the detector and the adjacent sheaves whereby the detector indicates a derope condition. When the ski lift is operated to thereby move the sleeve over the detector and adjacent sheaves, a derope condition will be simulated and the alarm tested to determine whether it provides the appropriate signal.
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