US 5,708,416 AGranted

Wireless detection or control arrangement for escalator or moving walk

AssigneeOtis Elevator Company

InventorsVlad Zaharia, James A. Rivera

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Abstract

A control or detection arrangement for escalators, moving walks and the like includes a detector, an encoder unit connected to the detector, a wireless transmitter connected to the encoder unit, a wireless receiver, a decoder unit connected to the wireless receiver, and a microprocessor connected to the decoder unit. When an unsafe condition is detected by the detector, the encoder unit generates a trigger signal having at least one unique identifier for the detector. When received, the signal is passed by the decoder to the microprocessor which causes generation of a command signal to, for example, stop motion of the escalator. Alternatively, the inventive arrangement operates according to continuous or periodic transmission modes, which permit the arrangement to monitor operability of the detector, encoder unit, transmitter, receiver and the decoder unit.

Claims6

Dependent claims

A control arrangement, comprising:

a detector;
an encoder unit connected to said detector, said encoder unit including means for generating a trigger signal including two unique identifiers, a first of said two unique identifiers corresponding to an identification for an escalator, a second of said two unique identifiers corresponding to an identification for said detector;
a wireless transmitter connected to said encoder unit;
a wireless receiver;
a decoder unit connected to said wireless receiver, for passing only a trigger signal including at least said first or said second of said two unique identifiers;
a portable receiver unit, said portable receiver unit including means for receiving said trigger signal having said two unique identifiers, and means for displaying at least one of said two unique identifiers;
a microprocessor connected to said decoder unit and to a memory, said memory including instructions for generating a control signal in response to said trigger signal passed by said decoder unit;
a motor control unit connected to said processor;
a motor connected to said motor control unit;
and
a plurality of movable steps coupled to said motor, so that said control signal commands said motor control unit to stop motion of said motor and said steps.

8 more elements

Dependencies are inferred from the claim text.