Elevator excess speed detector with multiple light barrier

Details Elevator excess speed detector with multiple light barrier Elevator excess speed detector with multiple light barrier

1995-11-20

1997-07-15

Nappi, Robert

Elevator, industrial lift truck, or stationary lift for vehicle

With monitoring, signalling, and indicating means

Monitors operational parameter

187386, 187387, 187282, B66B 506, B66B 134

Patent

active

056486456

ABSTRACT:
An apparatus for detecting excess speed of an elevator car travelling in an elevator shaft includes a vertically extending measuring strip is mounted at one side of the shaft and a multichannel forked light barrier assembly mounted on the car with a pair of legs extending on opposite sides of the strip. The measuring strip has a vertically extending markings track in the form of flags side-by-side with a check track, each of which is scanned by a separate light barrier transmitting a light beam between the legs of the forked light barrier assembly. At the position of each flag there is formed a window in the check track. The speed of the elevator car is measured by detecting the time required to pass each flag and the elevator car is stopped in the case of excess speed. By reason of the arrangement of the flag track and the check track, possible faults can be detected since one light barrier must always be interrupted by reason the flags and the windows.

REFERENCES:
patent: 4434874 (1984-03-01), Caputo
patent: 4499974 (1985-02-01), Nguyen et al.
patent: 5135081 (1992-08-01), Watt et al.

Affiliated with

Also associated with

Rating

Elevator excess speed detector with multiple light barrier does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Elevator excess speed detector with multiple light barrier, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Elevator excess speed detector with multiple light barrier will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1494451