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:
Aug. 11, 1992
Filed:
Aug. 30, 1990
Shigemi Iwata, Inazawa, JP;
Mitsubishi Denki Kabushiki Kaisha, Tokyo, JP;
Abstract
An elevator control apparatus comprises a drive for driving the car door of an elevator, an operation management control device which is installed in a machine room of the elevator and which generates not only a command signal for controlling the operation management of the car, but also a door open ready signal, a door control device which is installed in the car and which controls the drive device based upon the command signal generated by the operation management control device. The door control device also generates status signal indicating the status of the door. The elevator control apparatus further comprises a first serial-parallel converter for serializing the command signal generated by the operation management control device, a second serial-parallel converter which deserializes the command signal serialized by the first serial-parallel converter and which serializes the status signals generated by the door control device, a serial transmission line which connects the first and second serial-parallel converters to each other and which transmits the serialized command signal and the serialized status signals, an open ready signal line which connects the operation management control device and the door control device to each other, and which transmits the door open ready signal from the operation management control device to the door control device.