Patent ID: 7228943

Claim:
An elevator apparatus for decelerating an elevator car when moving at an excessive speed in an elevator shaft, the apparatus comprising: a first car position detector for continuously detecting position of the elevator car moving in the elevator shaft, as first position information; a second car position detector for intermittently detecting the position of the elevator car moving in the elevator shaft, as second position information; position information correction means, receiving the first and second position information, for correcting the first position information based on the second position information, to produce corrected position information; overspeed determining means for determining at least one overspeed detection level based on the corrected position information; a car speed detector for detecting speed of the elevator car moving in the elevator shaft; comparison means for comparing the at least one overspeed detection level determined to the speed detected; and decelerating means for decelerating the elevator car when at least one of the overspeed detection levels is exceeded by the speed detected.