Benjamin, Charles H[enry], 1856- [from old catalog] · New York, H. Holt and company · leaf 202
8 to257 ft. per sec, thus comparing favorably with castiron split pulleys. The rims usually failed at thepoints where the arms were mortised in, and the stif-fening braces at these points did more harm than good.A wooden pulley with solid rim and web remained in-tact at 4450 rev. per min., or 467… … ROTATING DISCS. 177 increase the weight and therefore the centrifugal forcewithout adding to the strength. The centrifugal force and therefore the stresses dueto the force will be increased nearly in the ratio thatthe weight of rim and teeth is greater than the weightof rim alone. This ratio in…
Machine design
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