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The Pump Catechism; A Practical Help to Runners, Owners and Makers of Pumps of Any Kind. Covering the Theory and Practice of Designing, Constructing,

The Pump Catechism; A Practical Help to Runners, Owners and Makers of Pumps of Any Kind. Covering the Theory and Practice of Designing, Constructing,


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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. 1886 Excerpt: ...and consequently reversing the movement of the main piston. On the return stroke of the main piston the piston rod swings the upper part of the lever G to the right and thereby reverses the movement of the auxiliary valve F, whereby the port bi is closed, and at the moment the piston has reached the limit of its outer stroke the port b is opened by the valve E, and steam admitted to the other end of the sub'cylinder E1, causing the auxiliary piston E to reverse its motion, thereby opening the main port to admit steam to main cylinder at its outer end, whereby the movement of the main piston is again reversed. By this continuous movement of the auxiliary valve E, the ports b and 61 are kept closed, except at the end of each stroke; at the moment the main piston B is reversed, and as soon as the main piston B begins its returning stroke the auxiliary valve J? closes the ports b and bi respectively. This prevents any waste of steam in case the auxiliary piston E is worn enough so as to leak, as the ports b and bi are closed. When the auxiliary valve F is in its extreme outer position and tho port bi is open to admit steam, as shown in Fig. 7, a connection is established between the port b and the exhaust port c by means of the diagonal cavity d in the under side of the auxilary valve E, and when the valve F has shifted to its inner extreme position, the port bi and the exhaust port C are connected with each other by the diagonal cavity di in the bottom of auxiliary valve F. This arrangement admits of a short valve with a long stroke, which stroke is derived from the full stroke of the piston rod acting on the lower forked part of the lever G, which imparts a reciprocating motion to the valve rod F by means of connecting link H. The stud G2 being adjusted up or...


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Product Details
  • ISBN-13: 9781130908213
  • Publisher: Rarebooksclub.com
  • Publisher Imprint: Rarebooksclub.com
  • Height: 246 mm
  • No of Pages: 34
  • Spine Width: 2 mm
  • Width: 189 mm
  • ISBN-10: 1130908216
  • Publisher Date: 01 Mar 2012
  • Binding: Paperback
  • Language: English
  • Returnable: N
  • Weight: 82 gr


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