Escalator
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An escalator is a moving staircase which carries people between floors of a building or structure. It consists of a motor-driven chain of individually linked steps on a track which cycle on a pair of
Escalator in a metro station in Warsaw
Rows of escalators at the World Trade Center in Dubai
Escalators at the Christ the Redeemer statue in Rio de Janeiro, Brazil
Illustration from U.S. Patent#25,076: Revolving Stairs, issued August 9, 1859, to Nathan Ames
Elevator
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An elevator or lift is a machine that vertically transports people or freight between levels. They are typically powered by electric motors that drive traction cables and counterweight systems such as
Outside of typical elevators, shown in an office building in Portland, Oregon
This elevator to the Alexanderplatz U-Bahn station in Berlin is built with glass walls and doors, exposing the inner workings.
Elevator design by the German engineer Konrad Kyeser (1405)
Elisha Otis demonstrating his safety system, at the New York Crystal Palace, 1853