What is an Escalator

ESCALATOR

A n escalator is basically a conveyor belt with steps. It has two wheels at each end that drive a set of chains in a pulley-like fashion. The steps also have two sets of wheels that move along their own inner tracks and are positioned in such a way that each step is always level which is especially important when someone is getting on or off a moving escalator: Obviously, gravity is exerting a constant force on you; however, the force the escalator exerts as it moves you up or down perfectly counteracts gravity. keeping you in place on the step.

This conveyor-belt technology-the same that has moved coal, sand, and grain for years is also used in another kind of people mover. The moving sidewalk complete with handrails and other safety devices is a horizontal version of the escalator.