What is the elevator?

A motor-powered vertical lift, equipped with a box-like pods, by people or cargo carried, for the multi-storey building. Stepped treads mounted on a crawler on continuous operation, commonly known as the escalator. Motor-powered vertical lift, equipped with a box-like pods, by people or cargo carried, for the multi-storey building. Stepped treads mounted on a crawler on continuous operation, commonly known as the escalator.
Service at a predetermined floor fixed type lifting device. It has a car running on at least two vertical or inclined angle of less than 15 ° between the rigid guide. Car size and structure to facilitate passenger access or loading and unloading of cargo. Customary, regardless of their drive way, the elevator as a general term for vertical means of transport within the building.
Rated speed can be divided into low-speed elevator (less than 1 m / sec), fast elevators (1 to 2 m / sec) and high-speed elevator (more than 2 m / sec) 3. The mid-19th century, began to use a hydraulic elevator, the application is still on the low-rise buildings. In 1852, the United States of EG Otis developed to enhance the safety of the lift wire rope. In the 1980s, the drive unit further improvements, such as electric motors driven by worm drive winding drum, the balance weight. In the late 19th century, with a friction wheel drive, greatly increasing the lifting height of the lift.

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