ratchet-and-pawl
1Ratchet (device) — In mechanical engineering, a ratchet is a device that allows linear or rotary motion in only one direction, while preventing motion in the opposite direction. Ratchets are used in many other mechanisms, including clocks, capstans, turnstiles,… …
2ratchet coupling — noun : a shaft coupling having a ratchet and pawl or a similar device whereby the driven member may be turned in one direction only by the driving member and may also overrun the driving member …
3Ratchet — 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… …
4Ratchet brace — 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… …
5Ratchet drill — 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… …
6Ratchet wheel — 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… …
7ratchet — [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… …
8ratchet drill — noun : a hand drill in which the drill holder is revolved intermittently by a lever through a ratchet wheel and pawl * * * ratchet drill, a drill rotated by a ratchet wheel moved by a pawl and lever …
9ratchet — 1. noun /ˈrætʃɪt/ a) A pawl, click or detent for holding or propelling a ratchet wheel, or ratch, etc. b) A mechanism composed of a ratchet wheel, or ratch and pawl. 2. verb …
10ratchet crank — noun : a crank mounted on but not keyed to a shaft which it moves intermittently through a ratchet wheel and pawl …
