endless screw
endless screw, screw fixed so that it cannot move longitudinally as it rotates. Thus, instead of the usual action in which a screw advances itself through a medium as it turns, the screw remains stationary and forces the medium or a mechanical part to advance. When a screw of this type is arranged to drive a cogwheel whose teeth mesh with its thread, the screw is called a worm gear. See Archimedes' screw.
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ADVANCE , ad·vance / ədˈvans/ • v. 1. [intr.] move forward, typically in a purposeful way: the troops advanced on the capital she advanced toward him. ∎ make p… Drive , drive / drīv/ • v. (past drove / drōv/ ; past part. driv·en / ˈdrivən/ ) 1. [intr.] operate and control the direction and speed of a motor vehicle: h… Advancement , ADVANCEMENT
A gift of money or property made by a person while alive to his or her child or other legally recognized heir, the value of which the per… arrangement , ar·range·ment / əˈrānjmənt/ • n. 1. the action, process, or result of arranging or being arranged. ∎ a thing that has been arranged in a neat or attr… servomechanism , servomechanism Device that provides remote control to activate a mechanism. An input signal, such as a radio impulse or mechanical movement, converts… mechanical , mechanical •cackle, crackle, grackle, hackle, jackal, mackle, shackle, tackle •ankle, rankle •Gaskell, mascle, paschal •tabernacle • ramshackle •débâ…
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endless screw