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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.
The American National Elevator Standards Group (ANESG) sets an elevator weight standard to be 1,000 kg (2,200 lb). Additional requirements relating to access by disabled persons, may be mandated by laws or regulations such as the Americans with Disabilities Act .
Johnson Lifts established a joint venture with Japanese company Toshiba Elevator and Building Systems Corporation (a subsidiary of Toshiba) called Toshiba Johnson Elevators (India) Pvt. Ltd. on 27 October 2012. [15] [16] [17] Johnson Lifts stated that it entered into the partnership as it lacked the technology to produce high-speed lifts. The ...
A paternoster in Prague Paternoster elevator in The Hague, when it was still in operation. A paternoster (/ ˌ p eɪ t ər ˈ n ɒ s t ər /, / ˌ p ɑː-/, or / ˌ p æ-/) or paternoster lift is a passenger elevator which consists of a chain of open compartments (each usually designed for two people) that move slowly in a loop up and down inside a building without stopping.
If the service core (which contains the elevator shafts) becomes too big, it can reduce the profitability of the building. Architects must therefore balance the value gained by adding height against the value lost to the expanding service core. [10] Many tall buildings use elevators in a non-standard configuration to reduce their footprint.
Hoist atop an elevator. A hoist is a device used for lifting or lowering a load by means of a drum or lift-wheel around which rope or chain wraps. It may be manually operated, electrically or pneumatically driven and may use chain, fiber or wire rope as its lifting medium.
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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 ...