Ratchet (device)
Gear and pawl; prevents motion in one direction / From Wikipedia, the free encyclopedia
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"Ratchet mechanism" redirects here. For the muscle ratchet mechanism, see Sliding filament model.
A ratchet (occasionally spelled rachet) is a mechanical device that allows continuous linear or rotary motion in only one direction while preventing motion in the opposite direction. Ratchets are widely used in machinery and tools. The word ratchet is also used informally to refer to a ratcheting socket wrench.
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