GENERAL KNOWLEDGE

Detailed explanation-1: -Elisha Graves Otis (August 3, 1811 – April 8, 1861) was an American industrialist, founder of the Otis Elevator Company, and inventor of a safety device that prevents elevators from falling if the hoisting cable fails.

Detailed explanation-2: -However, in 1852, Elisha Graves Otis invented a safety brake that revolutionized the vertical transport industry. In the event that an elevator’s hoisting rope broke, a spring would operate pawls on the car, forcing them into position with racks at the sides of the shaft and suspending the car in place.

Detailed explanation-3: -Modern elevators use friction brakes: a pair of shoes that apply equal and opposite pressure to a drum, pulley or disc mounted on the motor shaft. Springs apply the brake shoes to the pulley and are lifted electrically. If power is lost, the brake applies.

Detailed explanation-4: -Elisha Otis, in full Elisha Graves Otis, (born August 3, 1811, Halifax, Vermont, U.S.-died April 8, 1861, Yonkers, New York), American inventor of the safety elevator.