Appleton's dictionary of machines, mechanics, engine-work, and engineering (1869)
New York, Appleton · leaf 190
one-pulley for driving feed-shaft. It runs loose on a stud, and has a pinion on inner endto drive the two worms. E, worms—one right, the other left—which drive the two worm-wheels so as to feed towards the rightor left, as the operator may wish. On the worm-geer shaft there is a pinion driving a… … 134 LATHE.
Mechanical engineering
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