ISBN: 9780217244077

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 illustra… More...

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. 1852 edition. Excerpt: ...to a BAILWAY CHAIR. pressure equal to twelve pounds on the square inch, from a hydraulic machine. By these means its dimensions are considerably reduced; and the key being retained in a drying-house till required, it is easily forced into the chair when necessary, while the moisture of the atmosphere, and the weather, make it expand so as to hold the rail with great tenacity. So great has been the expansive power of keys, that they have, in a few instances, been known to burst asunder the iron chairs in Chaie, Key, And Hail, which they were secured. On the Midland Counties line, the wooden keys have been found not to last more than about five years; and as they cost from PS8 to PS10 per thousand,--and upwards of seven thousand are used in a mile of railway with double track and sleepers of three feet apart,--the expense of renewal becomes an important item. To provide something more permanent, Mr. W.H. Barlow has invented a kind of hollow or tubular key of wrought iron, which is made to press equally against the top of the chair, the middle of the rail, and its top and bottom flanches. It is said that these have been tried with success on the Midland Counties, South-Eastern, Warwick and Leamington, and some other railways. The weight and the shape of the rails adopted are of great importance to the stability and economy of the line; and in the comparatively short period during which railways have been open, they have undergone great alterations. In determining the shape of the rail, it must be so formed that the pressure of the weight above may be as perpendicularly downwards as possible; for should it be directed sideways from the wheel, not only is there a great loss of power, but a strong tendency to throw the rails out of gauge, and... Frederick Smeeton Williams, Books, Reference and Language, Our Iron Roads; Their History, Construction And Social Influences Books>Reference and Language, General Books LLC<

ISBN: 0217244076

Paperback, [EAN: 9780217244077], RareBooksClub.com, RareBooksClub.com, Book, [PU: RareBooksClub.com], RareBooksClub.com, 659900, Business & Economic History, 659886, Biographies & Histori… More...

Paperback, [EAN: 9780217244077], RareBooksClub.com, RareBooksClub.com, Book, [PU: RareBooksClub.com], RareBooksClub.com, 659900, Business & Economic History, 659886, Biographies & Histories, 68, Business, Finance & Law, 1025612, Subjects, 266239, Books, 268163, History, 268153, Economics, 68, Business, Finance & Law, 1025612, Subjects, 266239, Books, 277113, Railways, 277115, History, 277116, Model Trains, 277117, Pictorial, 277076, Transport, 59, Reference, 1025612, Subjects, 266239, Books<

ISBN: 9780217244077

Our Iron Roads Their History Construction and Social Influences Author :Frederick Smeeton Williams 9780217244077 0217244076

ISBN: 9780217244077

NA Social Science, General Books LLC