Archimedes' screw

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Archimedes' screw,

a simple mechanical device believed to have been invented by Archimedes in the 3d cent. B.C. 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

[¦är·kə¦mēd‚ēz ′skrü]
(mechanical engineering)
A device for raising water by means of a rotating broad-threaded screw or spirally bent tube within an inclined hollow cylinder.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.
References in periodicals archive ?
A new piece of artwork could also be installed based on the Archimedean screw.
The 100kw electricity generator (hydro-turbine) powered by the Archimedean Screw will provide more than 75% of the power required for Freeman's Reach.
To him were attributed the Archimedean screw (a machine for raising Water) and various pulleys and levers--in fact, he once said, with reference to his levers, "Give me a place to stand on, and I will move the earth." He also built a planetarium or orrery in the shape of a sphere which represented the motion of the sun, moon, and planets; he wrote a book, On Spheremaking (now lost), about the construction of this instrument.
Initial evaluations by Camp Dresser & McKee were based on nine types or configurations of pumping systems representing four types of pumps: Archimedean screw; submersible centrifugals; dry pit centrifugals; and vertical wet pit centrifugals or turbines.
It will use two Archimedean screw turbines, which were originally invented by the ancient Greeks to pump water upwards for irrigation.
In a conventional Archimedean screw, during the melting stage, breakage of the solid bed in the cross channel direction can occur.
Using the power of the river, the generator is able to produce electricity that is the equivalent of 75% of the total energy requirement of the development - and it's all made possible by a 13m-long, 20-tonne Archimedean screw, which is driven by the flow of the River Wear.
The 150KW plant at Osbaston is based on a screw-turbine called an Archimedean screw that was originally developed by the ancient Greeks to pump water upwards for irrigation.
The extrusion was carried out using an Emerson and Renwick Ltd Labline extruder employing an Archimedean screw mechanism consisting of a 25.4 mm diameter screw, a 3:1 compression ratio, a length-to-diameter ratio of 24:1, five temperature zones each having individual thermostatic controls, thermocouples to measure the processing temperatures of the five zones of the extruder, a die slot with slit orifice (63.5 X 14.2 X 0.38 mm), and rollers to enable drawing and winding of the extruded products (Fig.
During his visit, Rose was also shown the recently-installed Archimedean screw, which will power a hydro-turbine providing around 75% of the total power requirement at Freeman's Reach.