Beale, Oscar James, Brown & Sharpe Manufacturing Company (Providence, R.I.) · Providence, R.I. : Brown & Sharpe Mfg. Co. · leaf 75
E^ig, 34. Worm-wheel with teeth eut in a straight path diagonally across face.Worm is double-threaded. 56 BROWN & SHARPE MFG. CO. … Pig, 35.Worm and ^A^orm-Wheel, for Gear-cutting Engine. PROVIDENCE, R. I. 57 ^^::
Gearing
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