Appletons' cyclopaedia of applied mechanics: a dictionary of mechanical engineering and the mechanical arts (1880)
D. Appleton and Company, Benjamin, Park, 1849-1922 · New York, D. Appleton · leaf 715
e jumper is secured. During the forwardstroke the spiral cylinder does not influence the piston-rod, which moves straight forward, and, onthe contrary, turns the cylinder on its own axis. On the next back stroke the piston-rod is againseized by the spiral cylinder, which is now brought up with its… … exhausted from the cylinder through a hollow oscillating cylindrical valve. This is moved by tappets,the action of which is also utilized for effecting the feed, which, by a combination of ratchet-wheeland screw, may be minutely graduated. ROCK-DRILLS. 685 At a test of thig machine at the St.…
Mechanical engineering -- Dictionaries
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