The Cheney Company

Robert P Smith

John F Prendergast, Sr

A control for an elevator system having a single hoistway and a single cab movable by a reversible motor vertically within the hoistway for servicing a plurality of floors. The control includes a call station located at each floor and having a hall call pushbutton, an arrival light and an in-use light, and a plurality of pushbuttons are located in the cab, with one being associated with each floor. A microprocessor is coupled to each of the hall call pushbuttons, in-use lights, arrival lights and cab pushbuttons and is programmed to respond to call signals for actuating a first switching circuit for energizing the motor for movement in a cab raising direction or a second switching circuit for energizing the motor for movement in a cab lowering direction in response to signals from the hall call pushbuttons or cab pushbuttons. The microprocessor is also programmed to determine the location of the cab and the required direction of cab movement, energize the switching circuit means to achieve the desired direction of cab movement and energize the appropriate arrival and in-use lights.

Growing community of inventors

Big Bend, WI, United States of America

Robert P Smith