Hiscox, Gardner Dexter, 1822?-1908 · New York, The Norman W. Henley publishing co. · leaf 322
^ the revolution of an eccen-tric bearing at the bottom ofthe shaft, driven by bevelgearing. The crushing conehas a slow rotation due to dif-ferential areas of cone and sta-tionary plates at the bottom ornearest contact surfaces. MIXING. 3ii … 1259c. HAND POWER ROCKDRILL, Jackson model.—A power-ful helical spring drives the drillforward. The crank operates a camwiper for drawing back the drill;the motion is regulated by the flywheel.
Mechanical movements
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