Otis Elevator Company

Joe K Koe

John C Doane

Herbert Jacoby

Gregory A Schienda

Arnold Mendelsohn

A display (22) has one or more digits (22-1, 22-2) each capable of displaying a plurality of alphanumeric characters. A character control (10) has an output line (12) for each possible character and provides a signal over the line to cause the character to be displayed by activating an opto-isolation device (20-1). The output lines (20-1) are connected to a plurality of scan devices (26-1) which are individually addressed by a computer (28). Each scan device (26-1) is connected to a group of lines (20-2) that are individually addressed by the computer (28). When a line (20-2,20-3) is found to have a signal on it, the line is given a name which is used by the computer (28) to read a stored code from a memory (28-2). This code is keyed to the display to cause the display to provide the character associated with the line name, hence, the line, and the code is then supplied serially to the display which displays the character when all the components of the code have been received. The character continues to be displayed until a new code is provided.

Alphanumeric display

An elevator control system wherein signals between fixtures and the controller are provided in time-division, half-duplex multiplexing protocol is disclosed. Remote stations (64, 150) serialize multiple fixture inputs (66-69) and outputs (106-109) and are characterized for response during particular time slots by binary address means (84). A master station (90) serializes multiple controller inputs (102-105) and outputs (93-96) and is responsive for all time slots in either a transmit or receive mode. A portion (82) of the controller (78) provides clocking (76) and dynamic addressing (98) for the system.

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Avon, CT, United States of America

Joe K Koe