-
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.