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. 11, 1989
Filed:
May. 10, 1988
Junichi Tanino, Inazawa, JP;
Abstract
A signal transmission apparatus for an elevator in a multi-story building comprises a small number of signal lines which carry, in a time-shared fashion, hall call signal and hall call registration information for all floors. On each floor, one or more signal terminal means comprises one or more push buttons for entering hall calls and one or more indicator lamps for indicating that a hall call has been registered. A reference signal originates in a control unit and propagates through a ring counter with stages corresponding to each signal terminal means and each separate direction of travel, ascending or descending, supported therein. A signal indicating that a button on a given signal terminal means has been pushed is transmitted over a hall call signal line in synchronization with the reference signal to the control unit. A hall call reference signal generated by the control unit is transmitted over a register line and is received by a signal terminal means to which it was transmitted in synchronization with the reference signal. Error detection and indication circuitry in each signal terminal means detects error conditions which could casue erroneous hall call signal information to be transmitted over the hall call signal line and provides a visual display to permit quick and easy isolation of which of the several data terminal means in the signal transmission system is causing the erroneous hall call signals.