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2 definitions found

From: Webster's Revised Unabridged Dictionary (1913)

 Rock shaft  Mach. A shaft that oscillates on its journals, instead of revolving, -- usually carrying levers by means of which it receives and communicates reciprocating motion, as in the valve gear of some steam engines; -- called also rocker, rocking shaft, and way shaft.
 

From: Webster's Revised Unabridged Dictionary (1913)

 Way shaft
 1. Mach. A rock shaft.
 2. Mining An interior shaft, usually one connecting two levels.