American Railways

Paperback | January 5, 2012

byEdwin A. Pratt

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Book may have numerous typos, missing text, images, or index. Purchasers can download a free scanned copy of the original book (without typos) from the publisher. 1903. Not illustrated. Excerpt: ... XIX MISCELLANEOUS SIGNALLING The imperfections of the original signalling arrangements on the American lines are being steadily superseded by improved methods. When the earliest of the railways were started the trains were run simply by giving to one so much start of another, on the single track then universal, trusting to chance that the second would not overtake the first, and that trains coming in opposite directions would be able to pass one another at the times and places arranged to that end. The natural result was that serious accidents occurred, and the system of organising the traffic by means of " train despatchers" followed. The railways could not afford to have signalmen at every desirable interval or passing point, and the idea was evolved of having a train despatcher stationed at the headquarters of a particular division, with a sheet of paper before him giving the actual position of every train on the lines included within that division, so that, by means of telegraphic communication with the agents at the different stations, he could direct the movements of the various trains and arrange where they should pass. It was an occupation that resembled the playing of chess by telegraph, and it became still more complicated when a double set of rails was supplemented by a third set, on to which a slow train could be turned, and could still proceed on its journey while a fast train continued on the other rails, to which the slow train would be again transferred at a point further on when the line was clear. Compared with a perfect system of block signalling, such as prevails in Great Britain, the work of the train despatchers on the American lines may seem to be decidedly crude; but it was the natural development of the limited means, the primitive methods, ...

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Book may have numerous typos, missing text, images, or index. Purchasers can download a free scanned copy of the original book (without typos) from the publisher. 1903. Not illustrated. Excerpt: ... XIX MISCELLANEOUS SIGNALLING The imperfections of the original signalling arrangements on the American lines are being steadily supersede...

Format:PaperbackDimensions:72 pages, 9.69 × 7.44 × 0.15 inPublished:January 5, 2012Publisher:General Books LLCLanguage:English

The following ISBNs are associated with this title:

ISBN - 10:0217681611

ISBN - 13:9780217681612

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