Henleys Encyclopaedia Of Practical Engineering And Allied Trades Vol 5 Classic Reprint

Excerpt from Henley's Encyclopaedia of Practical Engineering and Allied Trades, Vol. 5 Finning. - Pressing down the joint faces of dry sand moulds to prevent their fracture when dry. See Dry Sand Moulding. 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.

Excerpt from Henley's Encyclopaedia of Practical Engineering and Allied Trades, Vol. 1 The publication of this comprehensive work, intended to cover the entire practice of civil and mechanical engineering, is justified by the present conditions of that practice. Men in the offices and shops, in active professional and commercial work, and students in the schools are all to a great extent hampered by the ever extending character of engineers' work, and its intensified specialisation. The term engineering alone has now too vague a meaning to denote anything definite, without some qualifying prefix. The vast profession, or industry, or craft, is subdivided into more than a hundred well-defined and separate fields, and many of these are broken up into still more specialised departments. It is thus a fact, that competent and experienced engineers who have devoted their whole lives with absolute singleness of purpose to their chosen pursuits, cannot possibly intimately know the practice of more than a few of the related sections. Every great industry in which motors and machines are used is now catered for by manufacturers who mostly confine their business to the demands of a single industry, and in which alone their experience lies. Of all outside that, their knowledge is in a sense that of amateurs. What is true of the individual fields of action 18 true also of the separate crafts which are carried on in the separate shops and sub-departments of a single big works. The divisions between these, following the passing of the old race of mill wrights, grow sharper, more stringent, and more minute as time goes on. A workman is no longer a turner, or a machine hand, or a boilermaker, or a moulder, but he is a man doing one sub-section of work, or an attendant of one kind of machine. He is also either a mechanic, or a machine-minder. His speciality is thus as well defined as that of the group of manufactures carried on in the firm of which he forms a unit. This intensity of specialisation produces narrow views, and narrow ideals, and tends to induce only a languid interest in the related work that lies beyond. It renders the acquisition of minute knowledge in 'the other fields very difficult. Especially on those of limited means do these conditions press hardly. The mass of technical literature is too great to be purchased or even assimilated, neither is it essential except to a few. The requirements of most people are met by a special knowledge in one branch, and a general acquaintance with others related thereto. Hence the popularity enjoyed by encyclopaedias of a literary and scientific cast. 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.

Excerpt from Henley's Encyclopaedia of Practical Engineering and Allied Trades, Vol. 3 The early drilling machines were built to drill one or more holes, using vertical spindles on flat plates singly, which plates had to be bent subsequently. The result was that after the plates were bent, the holes would not match, and drifting was resorted to, just as when the punch was used. Then followed the mount ing of the rings on rollers, the shell lying with its axis in a horizontal direction, and bringing radial drilling machines over the seams. These commanded both longitudinal and circular seams, but the spacing had to be done by hand to centre p0ps, or circles of rivet holes previously marked from templet, or by hand. A good many of these machines were made, and are still in use. Soon the multiple spindle design was introduced, but in a rather crude fashion. The shells were suspended verti cally, and the seams drilled by means of two or more drills Operating round the circumferential seams, and driven simultaneously. But the drills had to be set and started, and withdrawn by hand, and so the economy sometimes was often less than that of a single spindle machine. Several circular settings were necessary before the shell could be completed, and for every hole in the longitudinal seams the shell had to be lifted and reset. Following this came the em ployment of two drilling heads on opposite sides of the shell, with spindles also on the inside for countersinking, or removing the arris. 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.

Excerpt from Henley's Encyclopaedia of Practical Engineering and Allied Trades, Vol. 7: A Practical and Indispensable Work of Reference for the Mechanical Engineer, Designer, Draftsman, Shop Superintendent, Foreman and Machinist Open Rods. - When the full sheaves lies between the crank axle and the link, then, if the eccentric rods are open, the above term applies. If they cross each other in that position of the sheaves, the term crossed rods is applied. The open rod arrangement is more favourable to equality of lead at each end of the stroke. 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.

This encyclopaedia is an invaluable resource for anyone working in the field of engineering or allied trades. Covering a wide range of topics, from basic principles to advanced techniques, this book is an essential reference for students and professionals alike. 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 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. 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.

This is a reproduction of a book published before 1923. This book may have occasional imperfections such as missing or blurred pages, poor pictures, errant marks, etc. that were either part of the original artifact, or were introduced by the scanning process. We believe this work is culturally important, and despite the imperfections, have elected to bring it back into print as part of our continuing commitment to the preservation of printed works worldwide. We appreciate your understanding of the imperfections in the preservation process, and hope you enjoy this valuable book.

This is a reproduction of a book published before 1923. This book may have occasional imperfections such as missing or blurred pages, poor pictures, errant marks, etc. that were either part of the original artifact, or were introduced by the scanning process. We believe this work is culturally important, and despite the imperfections, have elected to bring it back into print as part of our continuing commitment to the preservation of printed works worldwide. We appreciate your understanding of the imperfections in the preservation process, and hope you enjoy this valuable book.