Method and apparatus for testing magnetic proximity detectors on ski lifts
OwnerBrett D. Tresslerinventor
Life of this patent
Estimating the term…
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.
Claims9
The method of testing a cable derope magnetic proximity detector positioned adjacent a cable sheave on a cable operated ski lift comprising:
- temporarily securing a sleeve of non-ferromagnetic material to and coaxially over the cable, said sleeve dimensioned in length and thickness an amount sufficient to raise said cable simultaneously away from said detector and said adjacent sheave whereby said detector indicates a derope condition, and
- operating the ski lift to thereby move said sleeve over said detector and adjacent sheave.
An apparatus for testing a cable derope magnetic proximity detector positioned adjacent a cable sheave on a cable operated ski lift, said apparatus comprising:
- a non-ferromagnetic sleeve having an inside diameter for mating the outside diameter of the cable and dimensioned in length and thickness an amount sufficient to raise said cable simultaneously away from said detector and said adjacent sheave whereby said detector will indicate a derope condition, and
- means for temporarily securing said sleeve to and coaxially about said cable.
Dependencies are inferred from the claim text.