Mechanical movements, powers, devices and appliances (1901)
Hiscox, Gardner Dexter, 1822?-1908 · New York, N. W. Henley & company · leaf 351
ed over and the cast iron^converted into steel, is poured into moulds. 1426. LENS-GRINDING MACHINE. —The bell-crank arm a is made adjustable in the verticalshaft, and is pivoted for a free motion in the grind-ing cup b, to give a variety of motions to the cup-over the lens; or the operation may be…
Mechanical movements
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