ISBN: 9781130798036

RareBooksClub.com. Paperback. New. This item is printed on demand. Paperback. 250 pages. Dimensions: 9.7in. x 7.4in. x 0.5in.This historic book may have numerous typos and missing text.… More...

RareBooksClub.com. Paperback. New. This item is printed on demand. Paperback. 250 pages. Dimensions: 9.7in. x 7.4in. x 0.5in.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. 1874 Excerpt: . . . hardness will afford the most efficient wearing surface. The processes which have been attempted to effect this desirable combination in practice, have been numerous, and upon many roads the so-called steel-capped rail is employed with more or less satisfactory results. In some of these constructions the steel head is confined in place by means of bolts or rivets; in another form, much more expensive to execute, the iron base and stem are rolled at one operation, the steel cap at another, and the two parts together at a third. Mr. Wheelers simple and peculiar process of producing combination metal is admirably adapted for the purpose here under discussion. In support of this assertion, the following presentation of th case is made. To make the combination rai. , the first step consists in producing from the ingot of steel, enclosed in its iron case, an iron-coated steel top-plate for the rail-pile. Taking an ingot or other form of steel, it is reduced, as explained in our former article, at one heat, and by rolls to any required form to produce the desired rail-head. The form preferably adopted by the manufacturers is represented by the a!5ve c its ( Figs. I and 2), in which the steel top-plates, it will be observed, are surrounded by and welded to a shell of iron, which, as in the faggot, still serves to protect the steel while being heated in the railpile; the ends, if sawed off so as to leave the steel exposed, are covered by an iron cap. --Thus protected, the top plates are piled with the necessary amount of iron to form the body of the rail, and the pile thus pre pared is heated. No injury, it is claimed, can result to the steel thus protected; its peculiar virtues being preserved intact, while, in addition, the fact that by protecting it. . . This item ships from La Vergne,TN., RareBooksClub.com<