The machinist and tool maker's instructor, containing an easy method of calculating and laying out difficult work in the machine shop .. (1896)
Genung, Edward. [from old catalog] · New York [Press of J. B. Savage, Cleveland] · leaf 216
In this example, Fig. 8,we have two pulleys ordrums on the same shaft.A is 24 diameter and B is7 diameter; a weight of 40pounds is suspended fromthe largest pulley, shownat C; what weight will berequired at D to balance theweight at C? A being 24and B 7, then 24-^7=3 3-7,and 40 times 3 3-7=about137… … In this example, Fig. 9, (compound gearing), A isthe driving gear with 20 teeth, B 62 teeth and C 12 teeth 212 THE MACHINIST AND TOOT, MAKER* S INSTRUCTOR. (B and C are both on the same shaft or stud), and D has 100teeth; now if we turn the gear A with a force equal to 15pounds on the pitch line,…
Machinery
Internet Archive · Library of Congress · Public Domain Mark 1.0. Free to use for anything.
