ELEVATOR

• Building conveying systems mechanically move occupants and goods
• . In 1852, Elisha Otis introduced the safety elevator, which prevented the fall of the elevator cab if the cable broke.
• An elevator is a conveying device used to move people or freight vertically, usually between floors of a building.
• Hydraulic elevators use a fluid-driven hydraulic jack to lift the elevator car.
• Traction elevators have a drive machine with an electric motor and pulley-like (grooved) drive sheave that holds cables that move the elevator car up or down.
• Steel cables, called hoisting ropes, support the elevator and counterweight during normal operation. There are typically three to eight cables for each elevator.
• Passenger elevators are designed to carry people and small packages.
• Freight elevators are used to carry material, goods, equipment, and vehicles, rather than people.
• A dumbwaiter is a small freight elevator used to transport lightweight freight such as food, laundry, books, records, and other small items.
• A manlift is an elevator installed in a variety of structures and locations to provide vertical transportation of authorized personnel and their tools and equipment only.
• An escalator is a power-driven, continuously moving stairway system used for transporting people.
• A moving walkway is a power-driven, continuous, slow-moving conveyor belt that transports people horizontally.
• An inclined moving walkway, also called a moving ramp or power ramp, is a moving walkway that transports people on an incline, up to a 12° angle of inclination.
• A wheelchair lift is a powered device designed to raise a wheelchair or scooter and its occupant to overcome a step or similar vertical barrier, usually 6 ft (1.8 m) or less.
• An automated people mover (APM) is a fully automated, grade-separated mass transit system.
• Material-handling equipment is a mechanical device used to move and store materials and goods.
• A paternoster is a special type of elevator consisting of a constantly moving chain of boxes.