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Pocketbook of Useful Formulæ and Memoranda
for Civil and Mechanical Engineers

Forfatter: Guilford L. Molesworth

Sider: 744

UDK: 600 (093)

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392 Molesworth’s pocket-book Mechanical Powers. The effect of power transmitted by either the lever, pulley, inclined plane, wedge, screw, or wheel, and. axle, may be reduced in all cases to one rule, ciz. the gain of power is directly pro- portioned to the loss of motion, and vice versa. p = Power applied. P = Power transmitted. M = Motion of ( p) power applied. m = Motion of (P) power transmitted. P = m This of course does not include friction. The diagrams show the application in the case of tiij lever and wheel and axle. Millwork. NUMBER OF TEETH IN "WHEELS. N = Number of teeth in driving wheel. n — Number of teeth in driven wheel. V = Revolutions of driving wheel. v = Revolutions of driven wheel. NV NV h =------- v — _— o v n
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