Archimedes screw

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Archimedes' screw

The Columbia Encyclopedia, Sixth Edition | 2008 | The Columbia Encyclopedia, Sixth Edition. Copyright 2008 Columbia University Press. (Hide copyright information) Copyright

Archimedes' screw a simple mechanical device believed to have been invented by Archimedes in the 3d cent. BC It consists of a cylinder inside of which a continuous screw, extending the length of the cylinder, forms a spiral chamber. By placing the lower end in water and revolving the screw, water is raised to the top. The principle is applied in machines used for drainage and irrigation, and also in some types of high-speed tools. It can also be applied for handling light, loose materials such as grain, sand, and ashes.

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Archimedes screw

World Encyclopedia | 2005 | © World Encyclopedia 2005, originally published by Oxford University Press 2005. (Hide copyright information) Copyright

Archimedes' screw Machine used for raising water, thought to have been invented by Archimedes in the 3rd century bc. The most common form of the machine is a cylindrical pipe enclosing a helix, inclined at a 45° angle to the horizontal with its lower end in the water. When the machine rotates, water rises through the pipe.
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Archimedes' screw
Newspaper article from: Al Bawaba; 2/19/2005; 246 words ; Archimedes was one of the greatest Greek scientists (287-212 BC). Among his many achievements was inventing the hydraulic screw, known as Archimedes' screw. Archimedes' screw is used to raise water from one level to another...
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Newspaper article from: Western Morning News, The Plymouth (UK); 11/11/2008; 428 words ; ...Country Park, Ashburton, and it does indeed use an Archimedes Screw (in reverse) to generate up to 48kW of electricity...leat to take water from the river which passes down the screw, returning water to the river. This is the first such...
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Newspaper article from: Evening Courier (Halifax, England); 11/16/2007; 526 words ; ...to swim through gaps in the screw. The Archimedes Screws are hoped to be put at 68 sites...launched next week. Facts * Archimedes was born in Syracuse, Sicily...compound pulley and hydraulic screw * He is most famous for discovering...
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