Practical Switch Work; A Handbook for Track Foremen
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Practical Switch Work; A Handbook for Track Foremen

Practical Switch Work; A Handbook for Track Foremen


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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. 1894 Excerpt: ...be the gauge of the track distant from the crotch frog, find with a tape-line the point between the gauge lines of these two outer rails just lined, where the distance is equal to twice the gauge; at this point place the point of the crotch frog. Or, having lined the outside rails, as just indicated, use a frog-board, moving it to the point where it will gauge neatly with both outside rails, with perhaps slight adjusting of their line, and at this point place the point of the crotch frog. But the easiest way is to take from Tables Nos. 26 and 27 the distance between the main and the crotch frog, and, measuring along the main rail from A to B, in Diagrams Nos. 13 and 14, place the frog accordingly. The following tables give the necessary distances for finding the position of the crotch frog by measurement: --TABLE No. 26. Three-throws To Opposite Sides. In a three-throw to opposite sides, 4 feet 84inch gauge and No. 8 frogs, the crotch frog corresponding is a No. 6, and its' distance from either main frog, measured along the main rail to opposite its point, is 22 feet, and it will be upon the centre line of the straight or main track. For 4 feet 9 inch gauge and No. 10 frogs the corresponding crotch frog is a No. 7, and its distance from main frogs is 27 feet 9 inches. The distance between frog points for all suitable frogs is found in the columns of these tables under the heading " Between Points." First locate the main frog, and from it measure the distance to the crotch frog, taken from the tables. In a three-throw to same or opposite sides there is no practical difference in the number of crotch frog and the distance between the frog points, they being the same in both cases, nor is it necessary to have different distances between points for 4 f...


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Product Details
  • ISBN-13: 9781236001764
  • Publisher: Rarebooksclub.com
  • Publisher Imprint: Rarebooksclub.com
  • Height: 246 mm
  • No of Pages: 28
  • Spine Width: 2 mm
  • Width: 189 mm
  • ISBN-10: 1236001761
  • Publisher Date: 01 May 2012
  • Binding: Paperback
  • Language: English
  • Returnable: N
  • Weight: 68 gr


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