Otis Elevator Company cutaway drawing from the 1950s.
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Gallery of A Brief, Interesting History of the Otis Elevator Company - 2
Vertical cylinder, rope-geared hydraulic elevator with 2:1 gear ratio and rope control (about 1880). For higher rises and speeds, ratios of up to 10:1 were used, and the endless rope was replaced by a lever. (Courtesy of Otis Elevator Company.)