Questions and answers on pumps and pumping machinery (1912)
Wakeman, William Henry, 1855- [from old catalog] · Chicago, The Joseph G. Branch publishing company · leaf 88
PUMPS AND PUMPING MACHINERY. 77 … <0 ta 78 QUESTIONS AND ANSWERS ON A. No. By the use of a very ingenious device,water passing to the lower part 2 acts as a cushion, andautomatically relieves this bearing of all weight due tothe internal mechanism, also of the vertical shaft.
Pumping machinery
Internet Archive · Library of Congress · Public Domain Mark 1.0. Free to use for anything.
