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Shadoof or shaduf comes from the Arabic word شادوف, šādūf. It is also called a lift, [5] well pole, well sweep, or simply a sweep in the US. [12] A less common English translation is swape. [13] Picotah (or picota) is a Portuguese loan word. It is also called a jiégāo (桔槹) in Chinese.
The first known crane machine was the shaduf, a water-lifting device that was invented in ancient Mesopotamia (modern Iraq) and then appeared in ancient Egyptian technology. Construction cranes later appeared in ancient Greece , where they were powered by men or animals (such as donkeys), and used for the construction of buildings.
The introduction of this machine had a decisive influence on agriculture as this wheel lifted water 3 to 8 metres with much less labour force and time than the Shaduf, which was the previous irrigation device in the Kingdom. The Shaduf relied on human energy while the saqiya was driven by buffalos or other animals. [20]
The Shaduf chant is (or at least was) listed in the Guinness Book of Records as the "world's oldest known song". Oddly, I can't find any detailed information about the chant online - much less any audio or video recordings.
The screw pump is the oldest positive displacement pump. [1] The first records of a water screw, or screw pump, date back to Hellenistic Egypt before the 3rd century BC. [1] [3] The Egyptian screw, used to lift water from the Nile, was composed of tubes wound round a cylinder; as the entire unit rotates, water is lifted within the spiral tube to the higher elevation.
Sargent made several trips to Egypt, Greece and Turkey as part of a project commissioned by the Boston Public Library to explore the origin of Western religion through art. Whilst in Egypt, he created this canvas in 1890–91, depicting a group of locals drinking or collecting water from the Nile which had been raised to the bank by a shaduf. [1]
English muffins fit the machine perfectly, but reviewers have mentioned using everything from mini bagels to frozen waffles as the bread component. The world is your oyster, er, sandwich!
Mechanical advantage is a measure of the force amplification achieved by using a tool, mechanical device or machine system. The device trades off input forces against movement to obtain a desired amplification in the output force.