A device that allows you to turn a screw or bolt in one direction and then move the handle of the wrench or screwdriver back, without force, in the opposite direction to prepare for the next stroke, without removing the tool from the screw or bolt
mechanical device consisting of a toothed wheel or rack engaged with a pawl that permits it to move in only one direction move by degrees in one direction only; "a ratcheting lopping tool
A toothed steel bar or device that is usually placed on the lift hill or other hills on a roller coaster that prevents the train from rolling backwards when the ratchet dog (anti-rollback device) attached under the car engages with the ratchet in the steel bar
A claw tooth bar located on the track (most often on the lift hill) into which the anti-rollback device, or ratchet dog engages that will prevent the train from rolling backwards
a device that allows movement in one direction but not the other It has a toothed shaft or wheel on which a pawl rests The pawl is pivoted so that it can move over the teeth of the ratchet in one direction If the pawl or ratchet moves in the reverse direction, the pawl engages the teeth of the ratchet to prevent movement A pawl may also move to and fro to turn a ratchet wheel in one direction
A claw-toothed steel bar running on certain inclines that prevents a train from rolling backwards The ratchet causes the clanking sound associated with the chain lift (also referred to as the anti-rollback device or ratchet dogs) The ratchet itself does not stop the train This is done by a device affixed to the bottom of the car which catches in the ratchet
If a tool or machine ratchets or if you ratchet it, it makes a clicking noise as it operates, because it has a ratchet in it. The rod bent double, the reel shrieked and ratcheted She took up a sheet and ratcheted it into the typewriter
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 a ratchet below it to adjust the height
If you describe a situation as a ratchet, you mean that it is bad and can only become worse. another raising of the ratchet of violence in the conflict. a machine part consisting of a wheel or bar with teeth on it, which allows movement in only one direction (rochet, from rocquet ). ratchet up to increase something by a small amount, especially after a series of increases, or to increase in this way ratchet sth⇔up. Mechanical device that transmits intermittent motion or permits a shaft to rotate in one direction but not in the opposite one. Reversible ratchets are used on socket wrench handles and are convenient for tightening or loosening bolts in positions where a complete revolution of a wrench handle is impossible. They are used in mechanical jacks to lock the jack rod after each successive lift
a ratchet is an arrangement that permits some economic variable, such as investment or advertising, to increase, but prevents that variable from subsequently decreasing
A ratchet clause sets a minimum billing demand that applies during peak and/or non-peak months It is usually applied as a % of the peak demand for the preceding season or year
ratchets
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[ 'ra-ch&t ] (noun.) 1654. alter. of earlier rochet, from French, alteration of Middle French rocquet ratchet, bobbin, of Germanic origin; akin to Old High German rocko distaff; more at ROCK.