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Gearless Traction Machines
The gearless elevator was one
of the major new developments in elevator technology that accompanied the
proliferation of high-rise building. The first such system was installed
in the Beaver Building in New York in 1903, followed by the Majestic in
Chicago a year later. The gearless traction elevator differs from the types
of elevators previously described, as the use of a slow speed motor directly
connected to the driving sheave eliminates the necessity of using motor
speed reduction gearing. The result is a machine of great simplicity. The
relatively few parts and the compactness of the gearless elevator make it
the ideal drive for high speed work. Smooth, steady motion of the car is
assured under all conditions, although the machine is primarily designed
for the high-speed service of the taller buildings.
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