Appletons' cyclopaedia of applied mechanics: a dictionary of mechanical engineering and the mechanical arts (1880)
D. Appleton and Company, Benjamin, Park, 1849-1922 · New York, D. Appleton · leaf 614
leys should be made heavier for double than for single belts, and heavier for a given width offace if high than if straight, because straight-faced pulleys are used only for shifting belts, which ofcourse are much narrower than the face of the pulley. Thus a 30 x 12 in. pulley, high face,… … 586 PUMPING ENGINES. ing parts at so much a pound, are now generally furnished at so much a piece, varying with thediameter, width of face, etc. To increase the adhesion of the belt, pulleys are frequently covered or lagged with wood, leather,or India-rubber; but the fact seems to be that polished…
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