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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. [1]
General Construction. D.M. Consunji Inc. is a wholly owned subsidiary engaged in general construction services – the company’s core business. The subsidiary was founded in 1954. In late 1992, it received an award from the Construction Industry Authority of the Philippines for outstanding constructor in the building category from 1986–1992 ...
George W. Cannon was an American inventor from New York.He is best known for the invention of the mechanical dumbwaiter.Cannon first filed for the patent of a brake system (US Patent no. 260776) that could be used for a dumbwaiter on January 6, 1883. [1]
A dumbwaiter (lit. "silent waiter") is a small freight elevator. Dumbwaiter may also refer to: Lazy Susan, a small rotating table to serve food on a table; The Dumb Waiter, a 1957 one-act play by Harold Pinter; Dumb Waiters, a 1980 album by The Korgis "Dumb Waiters" (song), a 1981 song by the Psychedelic Furs
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.
The history of construction traces the changes in building tools, methods, techniques and systems used in the field of construction. It explains the evolution of how ...
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The company's products are used in various industries such as construction, fit-outs, industrial maintenance, material handling, and facilities maintenance. JLG was founded in 1969 and operated independently until its acquisition by Oshkosh Corporation in 2006.