GK
INVENTIONS
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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Elisha G. Otis
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Charles Macintosh
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Benjamin Franklin
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Sir Alexander Graham Bell
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Detailed explanation-1: -The OTIS ELEVATOR COMPANY can trace its origins to 1853, when Elisha Graves Otis introduced the first safety passenger elevator at the Crystal Palace Convention in New York City. His invention impressed spectators at the convention, and the first passenger elevator was installed in New York City in 1856.
Detailed explanation-2: -Elisha Graves Otis, introduced a safety device in 1853, he made the passenger elevator possible. Otis’ device, demonstrated at the Crystal Palace Exposition in New York, incorporated a clamping arrangement that gripped the guide rails on which the car moved when tension was released from the hoist rope.
Detailed explanation-3: -Otis created a superior device, a tough, steel wagon-spring meshing with a ratchet, and so created the elevator brake. In 1854, Otis dramatized his safety device on the floor of the Crystal Palace Exposition in New York. The inventor ascended in an elevator inside an open-sided shaft.