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Railway Signaling in Theory and Practice

Railway Signaling in Theory and Practice


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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. 1909 Excerpt: ...lock lever is reversed, the lever-man is free to unlatch and move the switch lever, he will throw a shearing strain on the plunger which might break it or the lock rod. By having the switch lever locked, either normal or reversed, by the lock lever, this is prevented. 3. Where switch and lock movements are used the signal lever operating each signal that governs any route over the switch, should lock the switch and lock lever normal, if the switch is to be in its normal position when the signal is clear, or reversed, if the signal governs a route over the switch in its reversed position. In the case of derails, as there is no route over them in their normal position, the signal lever should lock the switch and lock lever reversed. 4. Where facing point locks are used, the lever of each signal governing a route over any switch locked by a facing point lock should lock the facing point lock lever reversed. This insures that the switch points are locked by the facing point lock plunger before the signal can be cleared. This also applies to derails. There are three elementary components to which, like the prime factors of a number, all interlocking may be reduced. Each interlocking plant is made up of one or more of these elements. They are: (1) A plain crossing. (2) A junction. (3) A crossover between two tracks. Jill The correct signalling for a plain single track crossing is shown in Fig. 92, in which 1, 2, 11 and 12 are the distant signals, 3, 6, 8 and 10 the home signals, and 4, 5, 7 and 9 the derails shown in the figure as operated by switch and lock movements. Where one of the lines is a double and the other a single track line the signaling is shown in Fig. 93. This is merely an evolution from the other. The direction of traffic on the double track line...


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Product Details
  • ISBN-13: 9781151806819
  • Publisher: Rarebooksclub.com
  • Publisher Imprint: Rarebooksclub.com
  • Height: 246 mm
  • No of Pages: 100
  • Spine Width: 5 mm
  • Width: 189 mm
  • ISBN-10: 1151806811
  • Publisher Date: 01 May 2012
  • Binding: Paperback
  • Language: English
  • Returnable: N
  • Weight: 195 gr


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