Equipment for the production of elevator shaft information

Details Equipment for the production of elevator shaft information Equipment for the production of elevator shaft information

1996-06-28

1998-12-01

Nappi, Robert

Elevator, industrial lift truck, or stationary lift for vehicle

With monitoring, signalling, and indicating means

Monitors operational parameter

187283, B66B 136, B66B 134

Patent

active

058441808

ABSTRACT:
A device for monitoring the positioning an elevator cage within an elevator shaft. A light curtain with several light beams extends over a length of a cage threshold and along a height of a cage door. The light curtain may be produced by a first transmitter strip and a receiver strip and may be utilized as a security device to block operation of the elevator cage when persons or objects are in a region of the cage doors or story doors. Each light transmitter may lie opposite a respective light receiver so that each light beam from each light transmitter may be incident upon a respective light receiver. A pivotable masking plate may be mounted on a receiver strip side of a story threshold to project into the light curtain such that at least one light beam may be incident upon the masking plate instead of its respective light receiver. The interrupted light beam may be indicative of the actual position of the elevator cage. A correction magnitude utilized for properly adjusting the elevator cage from a coarse position to a target position may be determined from a predetermined target value and an actual value of the elevator cage position.

REFERENCES:
patent: Re33668 (1991-08-01), Gray
patent: 3743056 (1973-07-01), Zitelli et al.
patent: 4134476 (1979-01-01), Zolnerovich, Jr. et al.
patent: 4245721 (1981-01-01), Masel
patent: 4493399 (1985-01-01), Kajiyama
patent: 5659159 (1997-08-01), Koopman, Jr.
International Search Report.

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