Apparatus for detecting an irregularity in the frequency of step

Details Apparatus for detecting an irregularity in the frequency of step Apparatus for detecting an irregularity in the frequency of step

1994-03-14

1994-11-08

Bidwell, James R.

Conveyors: power-driven

Conveyor or accessory therefor specialized to convey people

With means to control the operation of the section

B65G 4300

Patent

active

053618874

ABSTRACT:
An apparatus for detecting an irregularity in the frequency of steps passing a particular point within a passenger conveying device is provided, comprising an apparatus for sensing the presence of an axle attached to the step without contacting the axle or a roller attached thereto.

REFERENCES:
patent: 3580376 (1971-05-01), Loshbough
patent: 4629052 (1986-12-01), Kitamura et al.
patent: 4800998 (1989-01-01), Myrick
patent: 4863006 (1989-09-01), Kotkata et al.
patent: 5096040 (1992-03-01), Wente et al.
patent: 5107975 (1992-04-01), Iwata
U.S. patent application Ser. No. 07/981,699 filed Nov. 25, 1992 entitled "Escalator Missing Step Detection" assigned to Otis Elevator Co.
Proximity Sensors-North American Edtion 1993-Pepperl & Fuchs, pp. 4-9, 160 & 161.

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