A jack (mechanical lifting device) which is operated by turning a leadscrew.

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  • Jackscrew — Jack screw , n. A jack in which a screw is used for lifting, or exerting pressure. See Illust. of 2d {Jack}, n., 5. [1913 Webster] …   The Collaborative International Dictionary of English

  • jackscrew — [jak′skro͞o΄] n. [ JACK + SCREW] a machine used to raise heavy things a short distance, operated by turning a screwlike shaft …   English World dictionary

  • Jackscrew — A jackscrew is a type of jack which is operated by turning a leadscrew. It is also known as a screw jack, and are commonly used as car jacks.A jackscrew s compressive force is obtained through the tension force applied by its leadscrew. An Acme… …   Wikipedia

  • jackscrew — noun Date: 1769 screw jack …   New Collegiate Dictionary

  • jackscrew — /jak skrooh /, n. a jack for lifting consisting of a screw steadied by a threaded support and carrying a plate or other part bearing the load. Also called screw jack. [1760 70; JACK1 + SCREW] * * * …   Universalium

  • jackscrew — A threaded device used in appliances for the separation of approximated teeth or jaws. * * * jack·screw (jakґskroo″) a threaded device used in orthodontic appliances for the separation or approximation of teeth or jaw segments …   Medical dictionary

  • jackscrew — n. machine that raises heavy objects …   English contemporary dictionary

  • jackscrew — A jack operated by a screw mechanism. Normally, it is used for raising light aircraft and lighter loads …   Aviation dictionary

  • jackscrew —   n.    a threaded rod used for centering and balancing a vault door & frame in position during installation …   Locksmith dictionary

  • jackscrew — /ˈdʒækskru/ (say jakskrooh) noun → screw jack …  

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