Elevators began as simple rope or chain hoists. The first electric elevator was built by Werner von Siemens in 1880. The safety and speed of electric elevators were significantly enhanced by Frank Sprague.
Today, elevators are built under strict supervision of the Building Codes. In addition other related standards are likely required to be complied with as specified by Local Authorities having Jurisdiction. All new elevators are computer-controlled and microprocessor based. This allows the elevator system to place cabs where they are most needed in the interest of smooth running, with behaviour based on analysis of building use called “Traffic Studies.” Traffic Studies are done by Professional el
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