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:
Mar. 06, 1979
Filed:
Dec. 13, 1977
Kenzo Tachino, Inazawa, JP;
Mitsubishi Denki Kabushiki Kaisha, Tokyo, JP;
Abstract
An elevator control system for an elevator system of the type in which a digital position detector is used and it detects relatively an amount of the car travelling to control the elevator system, is provided. The elevator control system comprises; a first power source; a detector for detecting ceasing of the first power source function resulting from power stoppage or other power source trouble; a car position detector including a position signal storing circuit for electrically storing the car position signal representing the car position; a second power source for supplying power source to the car position detector to secure its normal operation till the car completely stops after the power source trouble; a third power source for supplying power source to only the position signal storing circuit includes in the car position detector after the second power source ceases its function. With such a construction, the final position at which the car stops due to its power source trouble is continuously stored with an accuracy and, after restoration of the power source from the trouble, the car may quickly initiate its normal operation.