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:
Jul. 12, 1994
Filed:
Sep. 29, 1992
Mitsubishi Denki Kabushiki Kaisha, Tokyo, JP;
Abstract
An elevator door control apparatus includes at least one door safety device for detecting whether elevator doors are safe; an elevator control circuit for outputting a door-open/close command; and a door control circuit for controlling the opening/closing of doors on the basis of a door-open/close command issued from the elevator control circuit and for outputting a door reversal request to the elevator control circuit on the basis of the operation signal of the door safety device, wherein the door control circuit outputs a door reversal request to the elevator control circuit upon reception of the operation signal of the door safety device while the doors are being closed on the basis of a door-close command from the elevator control circuit, switches the door speed command pattern to a brake pattern from the door-close command speed pattern and thereafter switches the door speed command pattern from the brake pattern to the door-open command speed pattern when the door-open command is received from the elevator control circuit instead of the door-close command.