Escalator braking with multiple deceleration rates

Details Escalator braking with multiple deceleration rates Escalator braking with multiple deceleration rates

2005-12-06

2005-12-06

Bidwell, James R. (Department: 3651)

Conveyors: power-driven

Conveyor or accessory therefor specialized to convey people

With means to control the operation of the section

C198S330000

Reexamination Certificate

active

06971496

ABSTRACT:
A braking system for an escalator having multiple rates of deceleration. When electrical protective devices (EPD) indicate that the escalator should be stopped, the main controller makes a determination as to whether the maximum rate of deceleration should be applied or the lower rate of deceleration. The brake is then controlled according to this determination to prevent a sudden stopping of the escalator when it is not necessary. The EPDs may be divided into two or more groups for different rates of deceleration. A provision may be made for multiple signals at once. If the main controller fails to provide a deceleration rate, the braking controller automatically defaults to the maximum rate. This system may also be used with moving walkways or other conveyors.

REFERENCES:
patent: 4588065 (1986-05-01), Maiden et al.
patent: 4664247 (1987-05-01), Wolf et al.
patent: 4926981 (1990-05-01), Bruehl et al.
patent: 6247575 (2001-06-01), Thiel
patent: 6267219 (2001-07-01), Spannhake et al.
patent: 6273234 (2001-08-01), Balzer-Apke et al.
patent: 6520300 (2003-02-01), Balzer-Apke et al.

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