Mechanical movements, powers, devices and appliances (1901)
Hiscox, Gardner Dexter, 1822?-1908 · New York, N. W. Henley & company · leaf 31
26. WORM GEAR or ENDLESS SCREW. P = power. r = length of crank. R = radius of pitch line of gear. Jf =. pitch of screw. r = radius of winding drum. W= Pxrx6.28xR P = W X / X ^6.28 X /- X R w / X r if screw is double-thread. … 27. CHINESE WHEEL, or differen-tial axle, with crank or pulley. a = radius large drum.b ■=■ radius small drum. W = P X ^ X 2a — I? P = W X {^ — b) r X 2 THE MECHANICAL POWERS. 23
Mechanical movements
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