Machine design; a manual of practical instruction in designing machinery for specific purposes, including specifications for belts, screws, pins, gears, etc., and many working hints as to operation and care of machines (1918)
Wallace, Ernest L · Chicago, American technical society · leaf 96
nd the pulley. The strap tensionTa is, of course, equal to W2 and T0 to Wv The equation showingthe balance of forces for the condition when motion is about to occur, isTa- T0= F = P (driving force) (39) If the pulley be free to turn on its axis, instead of being fixedas in Fig. 50, the strap by its… … Fig. 51. Tension in Belt the resistance to be overcome. The tensions Tn and T0, which areequal at first owing to stretching the belt tightly over the pulleys atrest, change when an attempt is made to raise the weight by turn-ing the larger pulley; and just as the weight leaves the floor,…
Machine design
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