![]() Some elevators can also travel horizontally in addition to the usual vertical motion. 6.8 Medical emergency or code-blue service.9.8 Limited use and limited application.9.14 Material handling belts and belt elevators.11.1.1 Methods of removing condensed water. ![]() History Pre-industrial era Įlevator design by the German engineer Konrad Kyeser (1405) The earliest known reference to an elevator is in the works of the Roman architect Vitruvius, who reported that Archimedes (c. 212 BC) built his first elevator probably in 236 BC. Sources from later periods mention elevators as cabs on a hemp rope, powered by people or animals. The Roman Colosseum, completed in AD 80, had roughly 25 elevators that were used for raising animals up to the floor. Each elevator could carry about 600 pounds (270 kg) (roughly the weight of two lions) 23 feet (7.0 m) up when powered by up to eight men. In 1000, the Book of Secrets by Ibn Khalaf al-Muradi in Islamic Spain described the use of an elevator-like lifting device to raise a large battering ram to destroy a fortress. ![]() In the 17th century, prototypes of elevators were installed in the palace buildings of England and France.
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