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:
Nov. 07, 1978
Filed:
Oct. 29, 1976
Tsuyoshi Satoh, Inazawa, JP;
Mitsubishi Denki Kabushiki Kaisha, Tokyo, JP;
Abstract
An elevator speed control apparatus is disclosed comprising: an ideal velocity generator for generating a velocity ideal for the cage to travel the distance to a floor the cage is to land; a velocity detector for detecting the velocity of the cage in motion; a comparator for comparing the actual cage velocity data supplied from the velocity detector with the ideal velocity data supplied from the ideal velocity generator; an acceleration setting device for setting an acceleration for the cage; an acceleration modifying device operated by the output of the comparator, for modifying the acceleration data supplied from the acceleration modifying device; a command velocity pattern generator for integrating with time the acceleration data supplied from the acceleration modifying device and thus generating a command velocity pattern; and a motor driving device for controlling the cage hoist driving motor according to the command velocity pattern; wherein an ideal cage velocity is maintained by modifying the acceleration data according to the output of the comparator.