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parallel motion

a mechanism arranged so as to impart rectilinear motion to a rod connected to a lever that moves through an arc.
Origin of parallel motion
1820-30 Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2015.
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Examples from the Web for parallel-motion
Historical Examples
  • This form was objectionable, as the whole effort of the engine was transmitted through the parallel-motion rods.

  • I contrived a sectional model of a complete condensing steam-engine of the beam and parallel-motion construction.

    Stories of Invention Edward E. Hale

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