The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Feb. 04, 1992
Filed:
May. 25, 1990
Shigemi Iwata, Inazawa, JP;
Mitsubishi Denki Kabushiki Kaisha, Tokyo, JP;
Abstract
An elevator control apparatus comprises drive device for driving an elevator car and a pulse generator, which is connected to the drive device and which generates pulses, the number of which are proportional to the travel distance of the car. The apparatus also comprises computing device for present car position for computing the present position of the car by counting the number of pulses from the pulse generator, computing device for predicted stop position for computing a predicted stop position of the car in case of a power failure during the travel of the car, first memory for storing data of the predicted stop position of the car and for maintaining that data, and second memory for previously storing position data of each floor in relation to an elevator. The elevator control apparatus further includes control device for controlling the drive device based on the present position of the car and the data stored in the second memory, and computing device for correcting car position at power failure for correcting, upon recovery from the power failure, based on the data stored in the first memory and the second memory, the present position of the car, which is computed by the computing device for present car position before the power failure occurs.