A hand book of general instruction for mechanics, containing useful rules and memoranda for practical men (1907)
Smith, Franklin Elijah, 1872- · New York, D. Van Nostrand company · leaf 303
r by the length of thewedge and divide by the thickness. P = powerP X L L = length ~~T T = thickness W = weight Weight = 290 A HAND BOOK FOR MECHANICS Example. If a wedge is 15 inches long and 2 inchesthick, what weight will it raise if the power applied is100 pounds? W = 100 X 15 1500 = 750 lbs. 2… … W 200 X 12 2400 = 600 lb. The Screw Fig- 102 The screw is essentially an in- clined plane wrapped around a cylinder, as may be seenby taking a triangular piece of paper and winding itaround a cylindrical barrel. Take, for example, the inclined plane A, B, C (Fig.103), and bend it in circular form…
Mechanics · Arithmetic · Measurement
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