overhead crane

A crane which travels on elevated beams in a foundry, machine-shop, or on high scaffolding above a structure. overhead-gear, subst. Driving-gear above the object driven. overhead-motion, s. Turning: A frame attached to the bench of a lathe, and rising about a foot above the head of the workman. It supports a spindle on which is a pulley driven by a band from the fly-wheel; another pulley on the same spindle carries a band which pa es down to the pulley on the spindle of the eccentric cutter. The latter spindle, on which the work is chucked, is stationary, while the cutter is made to revolve.