Transactions of the Federated Institution of Mining Engineers Volume 2
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Transactions of the Federated Institution of Mining Engineers Volume 2

Transactions of the Federated Institution of Mining Engineers Volume 2


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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. 1892 Excerpt: ...out in the writer's experience, and the re-covered rope afterwards worked twice as long as any previous rope in the same shaft. It may be argued that no wires of any shape are so sound and strong asthosewhich are circular in section. Experience has not borne out this theory, as sectional wires stand equally severe tests for torsional tension and elongation in the testing machine. An examination of the wires of one of these ropes is interesting, each wire being beautifully rounded and free from sharp edges. Moreover it may be pointed out that a round wire when exposed to wear rapidly assumes sharp edges, thus o (Fig. 14, Plate XXIII.), as an inspection of the crowns of the strands ami the two points where the strands rub together in any ordinary rope which has been at work a reasonable time will demonstrate. The density and compactness of a rope made on the locked wire principle has the advantage of not only excluding water and deleterious matter, but of occupying less room, and being lighter, strength for strength, than ropes of any other make, every wire with the exception of the single centre wire being a factor of strength. For example: a 3-inch circumference locked wire rope weighing 13 lbs. per fathom equals in strength, metal for metal, ordinary ropes 3J-ineh circumference, weighing 184-lbs., made entirely with wire-or 15f lbs. made with hemp centre core. An illustration (Figs. 16, 17, and 18, Plate XXIV.) is given of the above advantage, at Messrs. Crawshay Brothers, Castle Colliery, Cyfarthfa, where after deciding to draw coals from different levels, two flat ropes, 4 inches by ft inch, each weighing 2 tons 6 cwt. 3 qrs., were replaced on the same drum space by round locked wire roiies, 3-inches circumference, each weighing 1 ton 7 cwt. It was prove...


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Product Details
  • ISBN-13: 9781130733143
  • Publisher: Rarebooksclub.com
  • Publisher Imprint: Rarebooksclub.com
  • Height: 246 mm
  • No of Pages: 276
  • Spine Width: 15 mm
  • Width: 189 mm
  • ISBN-10: 1130733149
  • Publisher Date: 01 Mar 2012
  • Binding: Paperback
  • Language: English
  • Returnable: N
  • Weight: 499 gr


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