Major changes to the Elevator

By AAAAAAAAAAAAAAA

  • 1853

    Elisha Otis exhibited an elevator equipped with a device called a safety to stop the fall of the car if the hoisting rope broke.

  • 1857

    a steam engine was connected by belt and gears to a revolving drum on which the hoisting rope.

  • 1859

    an elevator raised and lowered by a vertical screw.

  • 1870s

    the rope-geared hydraulic elevator was introduced.

  • 1880

    The electric motor was introduced in elevator

  • 1887

    operated by an electric motor turning a revolving drum on which the hoisting rope was on.

  • 1890’s

    electric elevators with worm gearing connecting the motor and drum.