Escalator
An escalator is a moving staircase – a conveyor transport device for carrying people between floors of a building. The device consists of a motor-driven chain of individual, linked steps that move up or down on tracks, allowing the step treads to remain horizontal.
Escalator Media
Fujitec escalator in action, 2020
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
Macy's Herald Square store in New York City holds some well-known historic escalators. The model shown here, retrofitted with metal steps in the 1990s, is among the oldest of the store's 40 escalators. Otis "L-type" escalators with distinctive wood treads (not shown) have operated in the store since 1927.
Wooden treads on a 1930s Otis escalator, formerly at Wynyard railway station, Sydney, Australia
"Curved" escalator
"Crisscross" layout, Shanghai Museum
"Multiple parallel" layout, Holborn Station, London
A spiral escalator in Times Square, Hong Kong
Spiral Escalator US Patent 5,158,167 (Pahl 1992) drawing
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