link motion

noun

a mechanism controlling the valves of a steam engine, consisting of a slotted link terminating in a pair of eccentrics

One form of valve-gear is the link motion invented by Stephenson.

Stephenson's link-motion valve-gear is used on most locomotives.

Link motion for locomotives—George Stephenson, England, 1833.

I was much like the rest of the boys until I commenced to try to get up a substitute for the link motion.

The head stock of a lathe—the back gear in particular—is about as hard a thing to improve as the link motion of a locomotive.

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