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Difference between revisions of "Elevators"
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* [[Tumblers]] | * [[Tumblers]] | ||
* [[Vertical Elevators]] | * [[Vertical Elevators]] | ||
* [[Vertical Lift Conveyors]] | |||
* [[Vertical Transporters]] | |||
* [[Vibratory Elevators]] | |||
==History== | |||
Primitive elevators were in use as early as the 3rd century BC, operated by human, animal, or water wheel power. In 1743, a counter-weighted, man-powered, personal elevator was built for King Luis XV connecting his apartment in Versailles with that of his mistress, Madame de Chateauroux, whose quarters were one floor above King Luis. | |||
‘’’19th Century Elevators’’’ | |||
From about the middle of the 19th century, elevators were powered, often steam-operated, and were used for conveying materials in factories, mines, and warehouses. | |||
In 1823, two architects Burton and Hormer built an "ascending room" as they called it, this crude elevator was used to lift paying tourists to a platform for a panorama view of London. In 1835, architects Frost and Stutt built the "Teagle", a belt-driven, counter-weighted, and steam-driven lift was developed in England. | |||
‘’’Hydraulic Crane’’’ | |||
In 1846, Sir William Armstrong introduced the hydraulic crane, and in the early 1870s, hydraulic machines began to replace the steam-powered elevator. The hydraulic elevator is supported by a heavy piston, moving in a cylinder, and operated by the water (or oil) pressure produced by pumps. | |||
‘’’Elisha Otis’’’ | |||
In 1853, American inventor Elisha Otis demonstrated a freight elevator equipped with a safety device to prevent falling in case a supporting cable should break. This increased public confidence in such devices. In 1853, Elisha Otis established a company for manufacturing elevators and patented (1861) a steam elevator. While, Elisha Graves Otis did not actually invent the first elevator, he did invent the brake used in modern elevators, and his brakes made skyscrapers a practical reality. | |||
In 1857, Elisha Otis and the Otis Elevator Company began manufacturing passenger elevators. A steam-powered passenger elevator was installed by the Otis Brothers in a five-story department store owned by E.W Haughtwhat & Company of Manhattan. It was the first public elevator. | |||
‘’’Electric Elevators’’’ | |||
Electric elevators came into to use toward the end of the 19th century. The first one was built by the German inventor Werner von Siemens in 1880. | |||
Black inventor, Alexander Miles patented an electric elevator (U.S. pat#371,207) on October 11, 1887. | |||