parallel motion

American  

noun

1. a mechanism arranged so as to impart rectilinear motion to a rod connected to a lever that moves through an arc.

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Etymology

Origin of parallel motion

First recorded in 1820–30

Example Sentences

At times, sound and image achieve an exhilarating synchronicity, as when stripes are hurtling across the screen and Reich’s instruments are racing in parallel motion.

From The New Yorker • May 20, 2019

He called attention to what he termed "compound compasses," a class of linkages that included Watt's parallel motion, the pantograph, and the polar planimeter.

From Kinematics of Mechanisms from the Time of Watt by Ferguson, Eugene S.

It embraced many improvements, mostly, however, now of little consequence, the most celebrated being "parallel motion," of which Watt was prouder than any other of his triumphs.

From James Watt by Carnegie, Andrew

The indicator piston rod actuates an arm or line on the end of which is a pencil, which, by means of a parallel motion, is caused to move in a straight line.

From Modern Machine-Shop Practice, Volumes I and II by Rose, Joshua

This species of packing answers very well when the parallel motion is true, and the piston rod free from scratches, and it accomplishes a material saving of tallow.

From A Catechism of the Steam Engine by Bourne, John, C.E.