[ToC]

 

F. A. Annett, Elevators: Electric and Electrohydraulic Elevators, Escalators, Moving Sidewalks, and Ramps, Third Ed., McGraw-Hill, 1960

THESE CURVES, PLOTTED FROM A TRAFFIC STUDY MADE IN AN OFFICE BUILDING, GIVE A GENERAL IDEA OF THE PEAKS THAT OCCUR IN PASSENGER TRAVEL ON MODERN ELEVATORS

The in-service buttons put cars in or take them out of service. Below these buttons is a row of call-backs with which the starter can call any car back to the bottom landing. Then comes a row of bypass buttons with which the starter can call any car back to the bottom landing. Then comes a row of bypass buttons with which the starter can cause a car to bypass calls, and let a following car answer them. The keyed motor-generator switches for each elevator and the lights which show if these machines are in service are at the bottom of the panel.