Patent ID: 6666319
Filing Date: 2003-12-23
Classification: B66B

Abstract:
A device for monitoring a presence of steps of an escalator or pallets of a pallet belt of a moving walkway, comprising:at least one initiator which is operative as a function of proximity for producing signals representing a determination of a missing step of the escalator or a pallet of the pallet belt of the moving walkway; and an evaluation and control unit comprising at least two processors operatively coupled with the at least one initiator for stopping a drive of the escalator or moving walkway in response to the signals from the at least one initiator indicating a determination of a missing step or pallet by the at least one initiator, wherein the at least two processors operate independently from each other, monitor each other, control the signals of the at least one initiator, and exchange with each other status messages about the respective operating state of the at least one initiator and their own operating state within predeterminable time intervals.