Differential motion

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a mechanism in which a simple differential combination produces such a change of motion or force as would, with ordinary compound arrangements, require a considerable train of parts. It is used for overcoming great resistance or producing very slow or very rapid motion.

See also: differential

Webster's Revised Unabridged Dictionary, published 1913 by G. & C. Merriam Co.
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References in periodicals archive ?
The Direct Drive System provides power from the differential motion between the buoy float and a submerged resistant plate.
This differential motion of the mantle relative to the core stirred the liquid core, creating fluid motions that, in theory, could give rise to a magnetic dynamo.
Where piping attaches to equipment, flexible connections will accept the differential motion between piping attached to the ceiling and equipment attached to the floor.
This velocity field describes the differential motion of 3-space, and the various equations of physics must be generalised to incorporate this 3-space dynamics.
manufacturers, including General Motors, Ford Motor Co., and Chrysler Corp., rationalized that frontseat back collapse in rear-end crash tests did not produce any significant differential motion between the dummy's head and neck, and therefore posed less risk of connective-tissue injury.

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