A Treatise On Friction And Lost Work In Machinery And Millwork

Author : Robert H. Thurston
Publisher :
ISBN 13 : 9781332001521
Total Pages : 400 pages
Book Rating : 4.0/5 (15 download)

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Download or read book A Treatise on Friction and Lost Work written by Robert H. Thurston and published by . This book was released on 2015-07-27 with total page 400 pages. Available in PDF, EPUB and Kindle. Book excerpt: Excerpt from A Treatise on Friction and Lost Work: In Machinery and Millwork The following pages contain the results of an attempt to exhibit the facts and laws involved in the waste of energy by friction in machinery and mill-work. It is readily seen that in all well-designed machinery friction is the sole cause of lost work. The other possible cause, the permanent deformation of parts, cannot in such cases exist: every piece which is altered in shape by the forces received and transmitted, since it is never sprung beyond the elastic limit, restores by its restoration of form all energy expended in its alteration. Hence, the study of the methods and magnitudes of frictionlosses, and the laws governing their production, is, next to the theory of pure mechanism, the most important study in relation to the transmission of energy by machinery. In the endeavor to reconcile the facts of common experience with the data supplied by the working library of the engineer, and in the attempt to secure additional essential experimental data relating to lubricated surfaces, the Author was led into a series of investigations which revealed new facts and established the inapplicability of the usually received values of the coefficients of friction to much of the most familiar work of the engineer. The enormous variations observed in their values, as produced by change of pressure, of speed, and of temperature, and revealed by such investigations, compelled the Author to devise new apparatus and new methods of experiment, and finally led to the accumulation of a large mass of new and practically applicable data, the most important of which may be found here published. 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.