Hiscox, Gardner Dexter, 1822?-1908 · New York, The Norman W. Henley publishing co. · leaf 34
27. CHINESE WHEEL, or differen-tial axle, with crank or pulley. a = radius large drum.d = radius small drum. W — P X r X 2 a — d p = W X (^ — d)rX 2 THE MECHANICAL POWERS, 23 TACKLE BLOCKS. w … 28. Two single sheaves, a, b^ c are of equal^ strain. ^ -f <^ = W. Sheave A only transfers\r^ ^ the direction of P. 29. Simple sheave block. P r= W. 30. Two single sheave blocks—upper onefixed, lower movable. P=_W2 ^jT^^^^ir^^^^ 3^* Three single sheave blocks—one block fixed, two blocks movable.…
Mechanical movements
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