Elevators, just like many other advances in technology, became far more common in the mid-1800s during the Industrial Revolution. Many of these elevators were based off the hydraulic system, in which a piston inside a cylinder used pressure from water or oil to raise or lower the elevator car.

When did the elevator become popular?

Elevators became more common in the mid-1800s during the Industrial Revolution when they transported freight in factories and mines. These elevators were often based on the hydraulic system. A piston inside a cylinder used pressure from water or oil to raise and lower the car.

Were there elevators in the 1920s?

Automatic elevators began to appear as early as the 1920s, their development being hastened by striking elevator operators which brought large cities dependent on skyscrapers (and therefore their elevators) such as New York and Chicago to their knees. Self service elevators were not allowed in New York City until 1922.