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.

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.
References in periodicals archive ?
The Archimedean screw also improves the ecology of the river as its design incorporates an improved fish pass, which was created in consultation with the Environment Agency and enables fish and elvers to travel upstream more easily.
Managing director of Mann Power, which was the first company to introduce the Archimedean screw turbine to Britain, Dave Mann, said : "We're thrilled and privileged to be working at Cragside House, which is where it all began back in the late 1800s when the renewable energy pioneer Lord Armstrong used its lakes to generate hydroelectricity to light the house.
An Archimedean screw will harvest energy from the River Wear to drive a 100kw generator capable of supplying 75% of the total energy requirement of the new Freeman's Reach development in Durham City.
The turbine is driven by an Archimedean screw , which was supplied by Spaans Babcock, a specialist contractor with a local base in Heywood.
Andrew said: "The Archimedean screw is easy to install and maintain due to the simple mechanics, and because it works at low speed, it's possible forfish to pass through the turbine unharmed.
The electricity generating hydroturbine uses an Archimedean screw to harness the power of the river, generating more than 75% of the power required for Freeman's Reach.
The trust will be starting work to install an Archimedean screw hydroelectric turbine at the southern end of Tumbleton lake in the spring.
Plans include an Archimedean screw, harnessing the water flow through the three southern arches of nine-span Hexham Bridge at eight tonnes per second, with the construction of a fish pass next to the screw and a wall built along the apron.
We are looking at putting other hydro plants in there, using an Archimedean screw - a big steel water chute with a screw inside, like a big bottle opener.
The complex civil engineering project saw Rainton Construction undertake the technically challenging construction of a concrete channel in the River Wear, to house a 13 metre long, 20 tonne Archimedean Screw for hydro-power generation on the site - the first UK city centre development to do so.
Durham's Rainton Construction installed a concrete channel to take a 13-metre long, 20 tonne Archimedean Screw, which is turning the city into the first in the UK with a hydro generation system on site to provide electricity.
Utilising energy from the River Wear, an Archimedean screw drives a generator, which feeds the National Grid with power that is the equivalent of 75% of the energy requirements of Freeman's Reach.