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Pumps, Their Principles and Construction; A Series of Lectures Delivered at the Regent Street Polytechnic

Pumps, Their Principles and Construction; A Series of Lectures Delivered at the Regent Street Polytechnic


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About the Book

This historic book may have numerous typos and missing text. Purchasers can download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1898 Excerpt: ...height measured from surface of water in the well to the top end of the delivery pipe. So that the work done and power exerted shall not be equal to each other, as worked out in the problem, the height to which the water is raised should be less than that given. As another example: What is the largest size pump, fitted as Fig. 37, that could be used for raising water to a height of 60 ft. above that in the well? The formula then becomes Where P--man's power in lbs. L = distance of handle from centre of crank shaft in inches. S = distance of crank between centres in inches. H = height to be lifted in feet. W = weight of water on a circular inch in the barrel for each foot of head = '34 lbs. D = diameter of pump in inches. and v 4-9 = 2'2I3 in. as the diameter sought. Here again an equil1brium is established, and the pump should be a little less, so that power may exceed load. From this working out we are led to the conclusions that the pump mounted as shown by Fig. 37 is only satisfactory when of a smail size, or used for raising water to a moderate height. The flywheel has an advantage in that, when fairly heavy, it steadies the action of the pump. By its momentum it carries the motion of the pump beyond those parts where the man can exercise the least power, such as when the handle is horizontal with the axis. When the pump is fixed in the well, and the plank and winch above ground, the guide Q should be attached to the plank, so that the motion of the bucket rod is always vertical If the sling and guide were attached to the pump the rod would rattle very much, and in its oscillating movements would be liable to bending between the guide and winch. Another wheel action is shown by Fig. 39. When the pump is fixed below ground the wheel is mounted on a plank...


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Product Details
  • ISBN-13: 9781130894837
  • Publisher: Rarebooksclub.com
  • Publisher Imprint: Rarebooksclub.com
  • Height: 246 mm
  • No of Pages: 30
  • Spine Width: 2 mm
  • Width: 189 mm
  • ISBN-10: 1130894835
  • Publisher Date: 01 Mar 2012
  • Binding: Paperback
  • Language: English
  • Returnable: N
  • Weight: 73 gr


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