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 7 X 2 a — d rX 2 THE MECHANICAL POWERS. 23 TACKLE BLOCKS. a % Jj—^ 28. Two single sheaves, a, b, c are of equal/^ii \ strain. ^-|-<^ = W. Sheave A only transfers ^— \r^^ ^ the… … 29. Simple sheave block. P r=: W. 30. Two single sheave blocks—upper onefixed, lower movable. P=W 2 ■yyz^^y^yyyyyy^^^.y. ^i. Thrcc slngle shcave blocks—one block fixed, two blocks movable. P = W —. W = P X 4.
Mechanical movements
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