ratchet

ratchet
[1] A feature of a special wrench which allows you to turn the handle in one direction to tighten a nut or bolt, but turning it in the opposite direction does nothing but position the handle back where you started and leaves the wrench on the nut or bolt. Likewise you could set the wrench to loosen a nut or bolt.
[2] A drive handle with ratchet mechanism, usually called a socket wrench.
[3] A toothed rack or wheel which is engaged by a lever to permit motion in only one direction. Also see tap ratchet.

Dictionary of automotive terms. 2015.

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  • Ratchet — Ratch et ( [e^]t), n. [Properly a diminutive from the same word as rack: cf. F. rochet. See 2d {Ratch}, {Rack} the instrument.] 1. A pawl, click, or detent, for holding or propelling a ratchet wheel, or ratch, etc. [1913 Webster] 2. A mechanism… …   The Collaborative International Dictionary of English

  • Ratchet — Saltar a navegación, búsqueda Ratchet puede referirse a: El personaje Ratchet, del universo de los Transformers, capaz de transformarse en una ambulancia. El personaje Ratchet, de la serie de videojuegos Ratchet Clank. Obtenido de Ratchet… …   Wikipedia Español

  • ratchet — A mechanism by which the successful performance of management reflected in growth in the value of a company is rewarded by progressively increasing their share of the equity. Easyform Glossary of Law Terms. UK law terms. ratchet …   Law dictionary

  • ratchet — ► NOUN ▪ a device consisting of a bar or wheel with a set of angled teeth in which a pawl, cog, or tooth engages, allowing motion in one direction only. ► VERB (ratcheted, ratcheting) 1) operate by means of a ratchet. 2) (ratchet up/down) cause… …   English terms dictionary

  • ratchet — [rach′it] n. [earlier rochet < Fr, lance head, distaff < It rocchetto, bobbin, spindle, dim. of rocca, distaff < Goth * rukka, akin to OHG roccho, spindle, distaff < IE base * ruk(k) , spun yarn] 1. a toothed wheel (in full ratchet… …   English World dictionary

  • Ratchet — A ratchet may refer to: * Ratchet (device), a mechanical device for controlling rotational motion * Socket wrench, a tool that makes use of the above mechanical device * A part of some forceps, to fix the blades of the forceps, such as in… …   Wikipedia

  • ratchet — ▪ I. ratchet ratch‧et 1 [ˈrætʆt] noun [countable] FINANCE an arrangement in which the value of someone s share in a company depends on how well the company performs. This is often done where company managers own a share in the company: • A… …   Financial and business terms

  • ratchet — [[t]ræ̱tʃɪt[/t]] ratchets, ratcheting, ratcheted 1) N COUNT In a tool or machine, a ratchet is a wheel or bar with sloping teeth, which can move only in one direction, because a piece of metal stops the teeth from moving backwards. The chair has… …   English dictionary

  • ratchet — /rach it/, n. 1. a toothed bar with which a pawl engages. 2. (not in technical use) a pawl or the like used with a ratchet or ratchet wheel. 3. a mechanism consisting of such a bar or wheel with the pawl. 4. See ratchet wheel. 5. a steady… …   Universalium

  • ratchet — {{11}}ratchet (n.) 1650s, from Fr. rochet bobbin, spindle, from It. rocchetto spool, ratchet, dim. of rocca distaff, possibly from a Germanic source (Cf. O.H.G. rocko distaff, O.N. rokkr), from P.Gmc. *rukka , from PIE root *rug to spin. Cf.… …   Etymology dictionary

  • ratchet — ratch|et1 [ˈrætʃıt] n [Date: 1600 1700; : French; Origin: rochet, from Old French rocquet point of a spear ] a machine part consisting of a wheel or bar with teeth on it, which allows movement in only one direction ratchet 2 ratchet2 v ratchet up …   Dictionary of contemporary English

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