Modern mechanism, exhibiting the latest progress in machines, motors, and the transmission of power, being a supplementary volume to Appletons' cyclopaedia of applied mechanics (1892)
Benjamin, Park, 1849-1922 · New York, D. Appleton · leaf 730
direct acting ; that is, thecutting tools being attached rigidly to the piston, the blow is dealt directly by the steampressure in the cylinder and without any intervention of crank shafts, levers, or springs.The feed motion of the carriage upon the track is operated by, and dependent upon,… … the car, and it is thus fed throughtraction upon the rails. This feedmotion is imparted to the car on theupward stroke of the piston only ;the car remains stationary when theblow is struck. There is thus anintermittent feed motion, and thedrills are moved a definite distancein the cut at every…
Mechanical engineering
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