Questions and answers on pumps and pumping machinery (1912)
Wakeman, William Henry, 1855- [from old catalog] · Chicago, The Joseph G. Branch publishing company · leaf 64
which cams are used instead of cogs. 198. Q. What is the object of this improvement?A. To reduce friction and wear, and at the same time make the pump more efficient. 199. Q. Will this pump raise water withoutpriming? A. Yes; it will do this equal to any other kind,and much better than some of… … FiG3o 54 QUESTIONS AND ANSWERS ON 201. Q. Previous illustrations show rotary pumpsin which one internal part drives the other by contactof gears. Do all rotary pumps operate on this prin-ciple? A. No. 202. Q. What other principle is adopted, and how-does it operate in practice? A. The internal…
Pumping machinery
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