Appleton's dictionary of machines, mechanics, engine-work, and engineering (1861)
Appleton, firm, publishers, New York. (1852, D. Appleton & Co.) · New York : D. Appleton · leaf 417
responding set of cone-pulleys. T, near the top of theframe r r and h h, are geers for decreasing the motion of the drill, similar to the back geering of turn-ing-lathes. Upon the shaft which carries the cone-pulleys T is a bevel geer, which drives anotherbe\ el gMT made fast on the spindle-tube B.… … —c The machine is adapted to feed the drill down by hand, or it can be made self-acting. When feedingthe drill by hand, by turning the hand-wheel a, Fig. 1134, motion is communicated through thegeer d to the geer/, which is fastened to a revolving nut which moves the feeding-screw up or down…
Mechanical engineering
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