Elevator
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The Elevator is a mechanical device used for vertical transport. There are two types of elevators: hydraulic and roped elevators.
The development of the elevator in the late 19th century allowed for the creation of the skyscraper.
Design
The design concept of the elevator is simple: it is a rope attached to a box, that allows for vertical movement.
Modern day elevators consist of a car within an enclosed space called a shaft. Vertical movement of elevators is controlled by a steel rope being pulled over a circular pulley, with a counterweight used to balance the weight of the elevator car.