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Wheel. An early wheel made of a solid piece of wood. A wheel is a rotating component (typically circular in shape) that is intended to turn on an axle bearing. The wheel is one of the key components of the wheel and axle which is one of the six simple machines.
A stream wheel is a vertically mounted water wheel that is rotated by the water in a water course striking paddles or blades at the bottom of the wheel. This type of water wheel is the oldest type of horizontal axis wheel. [citation needed] They are also known as free surface wheels because the water is not constrained by millraces or wheel pits.
Ratcheting freewheel mechanism (van Anden, 1869) In mechanical or automotive engineering, a freewheel or overrunning clutch is a device in a transmission that disengages the driveshaft from the driven shaft when the driven shaft rotates faster than the driveshaft. An overdrive is sometimes mistakenly called a freewheel, but is otherwise unrelated.
The Wheel of the Year in the Northern Hemisphere. Some Pagans in the Southern Hemisphere advance these dates six months to coincide with their own seasons. The Wheel of the Year is an annual cycle of seasonal festivals , observed by a range of modern pagans , marking the year 's chief solar events ( solstices and equinoxes ) and the midpoints ...
Potter's wheel. An electric potter's wheel, with bat (green disk) and throwing bucket. Not shown is a foot pedal used to control the speed of the wheel, similar to a sewing machine. In pottery, a potter's wheel is a machine used in the shaping (known as throwing) of clay into round ceramic ware. The wheel may also be used during the process of ...
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The Pelton wheel or Pelton Turbine is an impulse -type water turbine invented by American inventor Lester Allan Pelton in the 1870s. [1] [2] The Pelton wheel extracts energy from the impulse of moving water, as opposed to water's dead weight like the traditional overshot water wheel. Many earlier variations of impulse turbines existed, but they ...
Seattle Great Wheel. / 47.6061; -122.3425. The Seattle Great Wheel is a 53-meter tall giant Ferris wheel at Pier 57 on Elliott Bay in Seattle, Washington, United States. At an overall height of 175 feet (53.3 m), it was the tallest Ferris wheel on the West Coast of the United States when it opened in June 2012. [2] [6]