Electromagnetic gaging of elevator rails and other structures

Details Electromagnetic gaging of elevator rails and other structures Electromagnetic gaging of elevator rails and other structures

1993-10-25

1994-12-13

Stephan, Steven L.

Elevator, industrial lift truck, or stationary lift for vehicle

With monitoring, signalling, and indicating means

Monitors operational parameter

73786, 32420718, 187391, B66B 302

Patent

active

053731239

ABSTRACT:
Orthogonal sets (26, 28) of coils (21-24) are each connected for differential response to an alternating magnetic field in a taut wire (20) disposed adjacent a rail (76) in an elevator hoistway. The wire is powered with AC current (34, 38) which is also used (40, 44) to synchronously demodulate the response of the coils to the alternating magnetic field so as to produce an output signal (58, 67) indicative of the position of the coils with respect to the taut wire. The coils may be in a holder (70) which is resiliently urged (72) toward the rail, with the wire passing through a hole therein within the coils, or mounted on an elevator which also has a contactless rail position sensor (110-112). Variation in current adjacent the coils is measured by additively coupling the coils (FIGS. 8, 9) which may be used to compensate the position measured by the coils (FIG. 11). Rectangular coil cross sections, as well as preferred coil spacing and dimensions are shown.

REFERENCES:
patent: 4088952 (1978-05-01), Sikora
patent: 4754849 (1988-07-01), Ando
patent: 4967154 (1990-10-01), Marantette
patent: 5065093 (1991-11-01), Nauta et al.
patent: 5065631 (1991-11-01), Ashpitel et al.
patent: 5086882 (1992-02-01), Sugahara et al.
patent: 5151562 (1992-09-01), Fujita et al.
patent: 5193651 (1993-03-01), Shigeta et al.
patent: 5214947 (1993-06-01), Sissala et al.

Affiliated with

Also associated with

Rating

Electromagnetic gaging of elevator rails and other structures does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Electromagnetic gaging of elevator rails and other structures, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Electromagnetic gaging of elevator rails and other structures will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1194527