Elevator Trends: Progression of Stairwells From Mechanical to Automation and Advance Security
Simple transportation machinery was invented in 1743, and its modernization began in the 19th century. The older elevators were mechanical, of lower quality and they were operated by either being pulled by an animal or a semi-motorized assembly controlled by humans. Belt-driven elevators were used in the beginning, later elevators used steam engines and even […]
