Railway Signaling Volume 2

Railway Signaling Volume 2

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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. 1910 edition. Excerpt: ...of the difficulty of inspection if placed beneath them. 292. Maintenance: Frequent inspection of bond wires is necessary. Vibration due to passing trains sometimes causes them to break. The expansion and contraction of the rails often bows the wires, forcing them into such a position, that upon the passing of a train they will be caught under the spike heads and damaged. It is the practice on some roads to overcome this by driving the spikes reversed, that is with the back of the spikes towards the splice plate, as shown in Fig. 142. As copper is softer than iron, bonds of this material are more apt, in such instances, to be cut by the spikes. When the bonds are attached to the base of the rail, care must be taken to see that spikes are not driven too close to the terminals. /Art. 275). while in some cases, either the spikes have to be moved or the bonds renewed owing to excessive creeping of the rails. 293. Bond wires are frequently injured or broken by trackmen working about the rails; for instance, when renewing bolts or splice plates, a bond wire may be pinched under a splice plate or bolt head, and when located inside the splice plates, may be accidentally cut off when driving in a new bolt. When renewing ties, and when surfacing or shimming track, etc., the wires are often damaged by the tools employed. 294. Where a large number of refrigerator cars pass over the track, the salt water dripping from them, causes iron rail bonds to rust quickly. 295. One of the most difficult points at which to maintain bond wires is at highway grade crossings. First, on account of the comparatively damp condition, the wires are subject to a great deal of corrosion; second, they are difficult to inspect; third, as before noted, they are often damaged when...show more

Product details

  • Paperback | 176 pages
  • 189 x 246 x 10mm | 327g
  • Rarebooksclub.com
  • Miami Fl, United States
  • English
  • black & white illustrations
  • 1236643267
  • 9781236643261