Detection of escalator safety circuit component operability

Details Detection of escalator safety circuit component operability Detection of escalator safety circuit component operability

1995-03-16

1997-02-11

Dayoan, D. Glenn

Conveyors: power-driven

Conveyor or accessory therefor specialized to convey people

With means to control the operation of the section

B66B 2500

Patent

active

056011784

ABSTRACT:
A start up check relay is energized whenever escalator motor motive power is interrupted. The start up check relay checks speed and non-speed-dependent safety circuit components to determine whether these safety circuit components have all come to an escalator start up state. When the start up condition of these safety circuit components has been verified the circuit allows power to be applied to the escalator motor. When power is applied to the escalator motor, a start up delay timer is energized and the start up check relay is de-energized. When speed-dependent components of the escalator have come to operating speeds, the start up delay timer will be de-energized, and the escalator will continue movement in its normal operating mode provided that all safety circuits are fully operational.

REFERENCES:
patent: 5099977 (1992-03-01), Hirose et al.
patent: 5107975 (1992-04-01), Iwata
patent: 5186300 (1993-02-01), Zaharia et al.
patent: 5295567 (1994-03-01), Zaharia et al.
patent: 5526256 (1996-06-01), Sakata et al.

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