System and method for detecting the state of an elevator cage

Elevator – industrial lift truck – or stationary lift for vehicle – With monitoring – signalling – and indicating means – Monitors operational parameter

Reexamination Certificate

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C073S158000

Reexamination Certificate

active

07938233

ABSTRACT:
An elevator system includes a lift cage, which is provided with a belt having markings disposed along the length thereof. A device for detecting at least the position, optionally, also the speed and the acceleration of the elevator cage, which is used to scan the markings, comprises a detector which is secured to the elevator cage and is displaced therewith. The detector is, preferably, arranged in such a manner that it detects the markings in one section of the belt which extend from the underloop of the carrier rollers on the elevator cage directly to a fixed point of the belt.

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patent: 2008/0087502 (2008-04-01), Zapf
patent: WO 2004/106209 (2004-12-01), None

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