How Elevator Works

The elevator is a type of vertical transport equipment that efficiently moves people or goods between floors of a building. Elevators are generally powered by electric motors that either drive traction cables or counterweight systems like a hoist, or pump hydraulic fluid to raise a cylindrical piston like a jack.

Elevator History
https://engineers-channel.blogspot.com/p/elevator-history.html

How Machines Work
https://engineers-channel.blogspot.com/p/how-machines-work.html