AVAILABLE CAR ELEVATOR SYSTEM

In an elevator system available cars are assigned to zones of floors. Under certain conditions the number of floors effectively in a zone is altered. During zoned heavy-up traffic operation, movement of cars to certain floors may be expedited, as to the main floor, or the down demands in any zone, or to timed-out down demands. Service may also be expedited to a heavy-traffic floor from which a loaded car has departed, or for an extension floor demand. All available cars may be assigned to a specific floor with one car being permitted to serve other floors at intervals.