Inventors at work, with chapters on discovery (1906)
Iles, George, 1852-1942 · New York, Doubleday, Page & company · leaf 104
o Bilgram, ofPhiladelphia, turn with hardlyany friction whatever, al-though in some wheels theteeth run askew, or are sec-tions of cones which do notmeet at their apices. The Bil-gram gear cutter, and the Fellows gear shaper which turns outplain gear, exert a to and fro planing action. Ordinary… … Bilgram skew gearing. 68 FORMS TO LESSEN RESISTANCE they are, for example, applied to steam turbines whose velocitymust be reduced in the actuation of ordinary machines. Auto-
Inventions · Inventors
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