Self-adjusting elevator leveling apparatus and method

Details Self-adjusting elevator leveling apparatus and method Self-adjusting elevator leveling apparatus and method

B - Operations, Transporting

66

B

364/27

B66B 1/40 (2006.01) B66B 1/44 (2006.01)

Patent

CA 1129125

SELF-ADJUSTING ELEVATOR LEVELING APPARATUS AND METHOD ABSTRACT A first memory contains the location of each floor in the elevator shaft. A second memory stores a distance correction for each floor. The sum of the stored correc- tion and the stored location is compared with the actual car location in the shaft to position the car at a floor. Each time the car door opens, after a delay, the leveling distance is sensed and if the car is below a preselected level zone one unit of correction equal to a preselected distance is added to the stored correction. The result- ing new correction is stored in the second memory. On a successive stop at the same floor the car will position that preselected distance closer to the level zone until it is above the zone, when a unit of correction is sub- tracted from the stored correction. In this fashion the car clusters around the level zone. -1-

335037

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