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:
Jan. 30, 1979
Filed:
Nov. 22, 1977
Kenzo Tachino, Inazawa, JP;
Mitsubishi Denki Kabushiki Kaisha, Tokyo, JP;
Abstract
In a speed control system of elevator, a first speed pattern being an integration of an acceleration pattern and a second speed pattern decreasing at a constant speed for the remaining distance till the stoppage point, are set up. The car is operated in accordance with the first speed pattern. When the car reaches the decelerating point, the car is operated in accordance with the first speed pattern before the first and second speed patterns are not coincident, and then in accordance with the second speed pattern after they are coincident. A comparator is provided to detect the difference between the first and second speed patterns. When the car reaches the deceleration point, the acceleration pattern is successively reduced stepwisely in accordance with the output of the comparator. The reducing of the acceleration pattern is integrated and the result of the integration is used as the first speed pattern.