On the Construction of Cranes and Lifting Machinery (Classic Reprint) PDF Download
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Author: Edward C. R. Marks Publisher: Forgotten Books ISBN: 9780666821317 Category : Technology & Engineering Languages : en Pages : 276
Book Description
Excerpt from On the Construction of Cranes and Lifting Machinery The new matter, Part III., comprises numerous examples, setting forth the present practice of some Of the best-known makers of lifting machinery. Many of such examples serve to illustrate the extensive and extending application of electrical energy to the operation of cranes and lifting machines of all types. About the Publisher Forgotten Books publishes hundreds of thousands of rare and classic books. Find more at www.forgottenbooks.com This book is a reproduction of an important historical work. Forgotten Books uses state-of-the-art technology to digitally reconstruct the work, preserving the original format whilst repairing imperfections present in the aged copy. In rare cases, an imperfection in the original, such as a blemish or missing page, may be replicated in our edition. We do, however, repair the vast majority of imperfections successfully; any imperfections that remain are intentionally left to preserve the state of such historical works.
Author: Edward C. R. Marks Publisher: Forgotten Books ISBN: 9780666821317 Category : Technology & Engineering Languages : en Pages : 276
Book Description
Excerpt from On the Construction of Cranes and Lifting Machinery The new matter, Part III., comprises numerous examples, setting forth the present practice of some Of the best-known makers of lifting machinery. Many of such examples serve to illustrate the extensive and extending application of electrical energy to the operation of cranes and lifting machines of all types. About the Publisher Forgotten Books publishes hundreds of thousands of rare and classic books. Find more at www.forgottenbooks.com This book is a reproduction of an important historical work. Forgotten Books uses state-of-the-art technology to digitally reconstruct the work, preserving the original format whilst repairing imperfections present in the aged copy. In rare cases, an imperfection in the original, such as a blemish or missing page, may be replicated in our edition. We do, however, repair the vast majority of imperfections successfully; any imperfections that remain are intentionally left to preserve the state of such historical works.
Author: Edward Charles Robert Marks Publisher: Rarebooksclub.com ISBN: 9781230186665 Category : Languages : en Pages : 56
Book Description
This historic book may have numerous typos and missing text. Purchasers can usually download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1904 edition. Excerpt: ...100 and 101 modifications of the loose path are shown, in one of which (fig. 101) they are formed internally. The pressure of the superstructure of the crane upon the path is sufficient to keep it stationary when slewing or rotating under f ordinary conditions, but should the mechanism be suddenly stopped or started, the additional stress occasioned, instead of breaking the wheel teeth, or causing failure of some other part of the machine, as has so frequently happened where a fixed path is employed, would simply cause the loose path to revolve slightly upon its seat until the shock had spent itself. It will thus be seen that a loose roller path performs very much the same service for a crane that a safety valve does for a steam boiler. Under ordinary working conditions the loose roller path, like the safety valve, does not come into action; but so soon as any undue stress is brought upon the crane, the path yields, as the friction between it and its seating on the base plate is insufficient to resist anything beyond the ordinary stress of working. The loose path has also an advantage in that its occasional movement prevents the rollers from rubbing and wearing it in one place, or upon one small portion only, for in the majority of cases a crane is not often required to swing round in a complete circle, the chief work being confined to an angle of about 90 degrees; so that the path of a fixed crane will be quickly worn down in that one portion only, whilst the movement, in the case of a loose path, will cause the wearing to be equalised and distributed all round the ring; and further, a loose path can be readily renewed at any time, whereas the wearing down of a fixed path would in most cases mean a sacrifice of the whole bed or base...
Author: Joseph Glynn Publisher: ISBN: 9781330528099 Category : History Languages : en Pages : 140
Book Description
Excerpt from Rudimentary Treatise on the Construction of Cranes and Machinery The subject of this Treatise is the construction and use of machines which diminish toil, and facilitate and lessen labour without superseding it, enabling men to perform what they could not accomplish without such aid. Deprived of mechanical power, a man's force is limited to his muscular strength, of which he has but little, in proportion to his bulk and weight, when compared with other animals; his disposable mechanical force, when daily exerted for ten hours, being only about one-tenth of his weight. The old race of millwrights - men who designed and constructed their own work - may be considered extinct; and the operative engineers or "fitters" of modern times, although excellent workmen at the vice or the lathe, have, since the introduction of self-acting tools, and by the classification of labour, become almost machines themselves. One man has been trained to do one thing, in doing which, however skilful he may be, he exercises no discretion of his own; he has nothing to contrive or to proportion. But good springs out of evil. About the Publisher Forgotten Books publishes hundreds of thousands of rare and classic books. Find more at www.forgottenbooks.com This book is a reproduction of an important historical work. Forgotten Books uses state-of-the-art technology to digitally reconstruct the work, preserving the original format whilst repairing imperfections present in the aged copy. In rare cases, an imperfection in the original, such as a blemish or missing page, may be replicated in our edition. We do, however, repair the vast majority of imperfections successfully; any imperfections that remain are intentionally left to preserve the state of such historical works.
Author: Joseph Glynn Publisher: Palala Press ISBN: 9781378548561 Category : History Languages : en Pages : 210
Book Description
This work has been selected by scholars as being culturally important, and is part of the knowledge base of civilization as we know it. This work was reproduced from the original artifact, and remains as true to the original work as possible. Therefore, you will see the original copyright references, library stamps (as most of these works have been housed in our most important libraries around the world), and other notations in the work. This work is in the public domain in the United States of America, and possibly other nations. Within the United States, you may freely copy and distribute this work, as no entity (individual or corporate) has a copyright on the body of the work. As a reproduction of a historical artifact, this work may contain missing or blurred pages, poor pictures, errant marks, etc. Scholars believe, and we concur, that this work is important enough to be preserved, reproduced, and made generally available to the public. We appreciate your support of the preservation process, and thank you for being an important part of keeping this knowledge alive and relevant.
Author: Joseph Horner Publisher: Forgotten Books ISBN: 9780282703707 Category : Technology & Engineering Languages : en Pages : 368
Book Description
Excerpt from An Elementary Treatise on Hoisting Machinery: Including the Elements of Crane Construction and Descriptions of the Various Types of Cranes in Use In an elementary work of this Character it is not possible to enter into calculations, but the mode of treatment must be restricted to the description of practical details and of types in actual service from the point of View of the practical man, whether crane maker or user. All crane calculations are applications of the principles and problems laid down in many text-books of statics, to which reference can be made. We will indicate briefly the nature of the problems, and then go on to the practical work of the book. About the Publisher Forgotten Books publishes hundreds of thousands of rare and classic books. Find more at www.forgottenbooks.com This book is a reproduction of an important historical work. Forgotten Books uses state-of-the-art technology to digitally reconstruct the work, preserving the original format whilst repairing imperfections present in the aged copy. In rare cases, an imperfection in the original, such as a blemish or missing page, may be replicated in our edition. We do, however, repair the vast majority of imperfections successfully; any imperfections that remain are intentionally left to preserve the state of such historical works.
Author: Edward C. R. Marks
Author: Edward C. R. Marks
Author: Edward Charles Robert Marks
Author: Edward Charles Robert Marks
Author: Joseph Glynn
Author: Joseph Glynn
Author: Glynn
Author: Edward C R Marks
Author: Edward C. R. Marks
Author: Edward Charles Robert Marks
Author: Joseph Horner