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An elevator (American English) or lift (Commonwealth English) is a machine that vertically transports people or freight between levels. They are typically powered by electric motors that drive traction cables and counterweight systems such as a hoist , although some pump hydraulic fluid to raise a cylindrical piston like a jack .
Elisha Graves Otis (August 3, 1811 – April 8, 1861) was an American industrialist and founder of the Otis Elevator Company. [1] In 1853, he invented a safety device that prevents elevators from falling if the hoisting cable fails.
The Smith Tower in Seattle, Washington uses traditional elevator operators, as seen in this 2008 photo. An elevator operator (North American English), liftman (in Commonwealth English, usually lift attendant), or lift girl (in British English), is a person specifically employed to operate a manually operated elevator. [1]
Elevator, or lift, a device used for raising and lowering people or goods Paternoster lift, a type of lift using a continuous chain of cars which do not stop; Patient lift, or Hoyer lift, mobile lift, ceiling lift, a lift to assist a caregiver for a disabled patient; Rack lift, a type of elevator; Ski lift, an aerial or surface lift for uphill ...
A simple dumbwaiter is a movable frame in a shaft, dropped by a rope on a pulley, guided by rails; most dumbwaiters have a shaft, cart, and capacity smaller than those of passenger elevators, usually 45 to 450 kg (100 to 992 lbs.) [2] Before electric motors were added in the 1920s, dumbwaiters were controlled manually by ropes on pulleys.
Meanings common to British and American English American English meanings calipers (n.) (n.) A metal support for a person's leg and/or ankle. (US: ankle braces, leg braces) [27] [28] (n.) An instrument for measuring external or internal dimensions, having two hinged legs resembling a pair of compasses and in-turned or out-turned points. [27 ...
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In many places, particularly in North America, elevator mechanics belong to a company called Elevator Constructors. L abor unions have a large impact on the industry, depending on the country. Mechanics make an average annual wage of US$70,910 (as of May 2010). [1] Elevator mechanic jobs are expected to grow of 13% from 2014 to 2024. [1]