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  1. What Elisha Otis invented?

  2. A.

     The brake used in modern elevators

    B.

     Jet Engine

    C.

     Turbine

    D.

     Hydraulic Crane

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    Workspace

    Answer : Option A

    Explanation :

    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. Otis established a company for manufacturing elevators and patented (1861) a steam elevator.
    Many people think that he invented the elevator, but the truth is, he invented the elevator brake. He also invented the railway safety brake.


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