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 283
lley is really a combination of the cord and awheel, or of a cord and a number of wheels, or of a numberof cords and a number of wheels. The pulley or wheel is introduced only to reduce fric- 270 A HAND BOOK FOR MECHANICS tion, and the usefulness of the pulley is dependent whollyupon the cord.… … O O Fig. S3 In Fig. 84 is shown a single movable pulley. In thispulley the block A is movable and the wheel C turns within it.
Mechanics · Arithmetic · Measurement
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