English version

ratchet in Mechanical topic

From Longman Dictionary of Contemporary Englishratchetratch‧et1 /ˈrætʃɪt/ noun [countable]  TEMa machine part consisting of a wheel or bar with teeth on it, which allows movement in only one direction
Examples from the Corpus
ratchetJust as a ratchet turns easily one way but can not turn back, so genetic defects inevitably accumulate.A nylon webbing strap is wrapped around the frame and is then tightened using a ratchet action of the clamp head.Another sinister plot; another twist of the federal ratchet.The quick turnstiles metered the tokens with a noise of ratchets.Drive direction can be changed but the ratchet can't be locked out: operation was positive but fiddly.By the use of the ratchet, the investors agree to share success with the management.There is a sort of upward ratchet effect where each achievement level becomes the baseline for the next change.