Method and apparatus for testing an elevator speed limiter

Details Method and apparatus for testing an elevator speed limiter Method and apparatus for testing an elevator speed limiter

1996-03-06

1998-02-10

Nappi, Robert

Elevator, industrial lift truck, or stationary lift for vehicle

With monitoring, signalling, and indicating means

Monitors operational parameter

187287, B66B 134

Patent

active

057171750

ABSTRACT:
An apparatus for testing a speed limiter in an elevator installation includes a drive wheel engaging a cable groove of a cable guide roller in the speed limiter. The drive wheel is rotated by rotational device having a speed control for linearly increasing the speed of rotation of the cable guide roller until the speed limiter is triggered. The rotation of the drive wheel is detected by an evaluating device attached to the rotational device and having an opti-electronic system for generating a light beam toward reflectors on the drive wheel and detecting reflected light beams. The triggering instant of the speed limiter is detected by an acceleration sensor connected to the evaluating device which then calculates the triggering speed from the speed of the drive wheel at the triggering instant.

REFERENCES:
patent: 4322712 (1982-03-01), Yoshida
American National Standard Safety code for Elevators, Dumbwaiters, Escalators and Moving Walks, ANSI A17.1-1978 (pp. 94-96, 203, Dec. 17, 1979.

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