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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.
According to lore, Thomas Jefferson invented the device, which was known as a "dumbwaiter", for his daughter Susan. Regardless of the origins of the name, by 1917 it was advertised in Vanity Fair [ 4 ] as "Ovington's $8.50 mahogany 'Revolving Server or Lazy Susan ' ", [ 5 ] but the term's use predates both the advertisement and, probably, the ...
A Thwaites dumper in action A Neuson dumper A German-made Picco 1 dumper with one rear wheel in the midline. See de:Picco 1 (in German). A dumper or dumper truck is a vehicle designed for carrying bulk material, often on building sites.
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
Mega Builders is a documentary television series appearing on the Discovery Channel and Science Channel.Each episode takes a look into the people and the machines involved into the construction of many huge engineering projects.
UGL, formerly known as the United Group, is an engineering company.The company provides construction, maintenance, and asset management services to the rail, resources, and infrastructure sectors, and corporate real estate, facilities management, and business process outsourcing services to property users.
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The company produced its first portable steam engine in 1876, which is now on display at the Smithsonian Institution. [5] In 1957 Case made the 320 Construction King backhoe loader. [6] Since 1969 Case has manufactured skid steers, starting in Burlington, Iowa and later moving production to Wichita. [7]