Position sensing apparatus

Details Position sensing apparatus Position sensing apparatus

G - Physics

08

C

340/135

G08C 21/00 (2006.01) G01B 7/34 (2006.01) G01B 21/30 (2006.01)

Patent

CA 1214235

POSITION SENSING APPARATUS ABSTRACT OF THE DISCLOSURE The present invention relates to a sensing appa- ratus for sensing the displacement of a movable object relative to its ideal vertical path of travel. The appa- ratus includes two elongate reference wires extending par- allel to the ideal vertical path of travel of the object. The apparatus further includes two sensing devices mounted for movement with the object. Each of the sensing devices is normally positioned a predetermined distance from a re- spective one of the reference wires such that engagement of the reference wire by the sensing device indicates that the object has been displaced about or from its expected predetermined path of travel.

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