Change Gear Devices: Showing the Development of the Screw Cutting Lathe and the Methods of Obtaining Various Pitches of Threads (Classic Reprint) - Couverture souple

Oscar E. Perrigo

Couverture souple

ISBN 10 : 1332006256 ISBN 13 : 9781332006250

Editeur : Forgotten Books, 2018

Synopsis

Change Gear Devices reveals how the screw-cutting lathe evolved through a century of change gears, with clear diagrams and practical insights.

This concise reference traces the development of change gear devices for engine lathes and explains how different gears create varying thread pitches. The book surveys numerous patents, weighs their practical value, and highlights the core ideas behind each approach. It is written to help designers, manufacturers, and shop professionals understand where these devices came from and how they work in real machines.

Readers will gain a practical overview of the methods used to obtain various thread pitches, from early concepts to more refined systems. The discussion emphasizes what makes a device useful in a workaday shop, not just in theory, with attention to ease of use, reliability, and potential commercial value.

• Clear explanations of the “cone of gears” and multiplying gear concepts guiding pitch changes


• Comparisons of major patents and the evolution of practical change-gear arrangements


• Insights into design trade-offs, practicality, and what matters in a machine shop


• A historical perspective on how lathes became capable of precise, varied threading

Ideal for readers of engineering history, machine shop professionals, and students seeking a grounded view of screw-cutting gear systems.

A propos du livre

Présentation de l'éditeur

Excerpt from Change Gear Devices: Showing the Development of the Screw Cutting Lathe and the Methods of Obtaining Various Pitches of Threads

Some time ago the author had occasion to make a more or less exhaustive examination of the subject of Change Gears for engine lathes, and the development of the devices for this purpose as represented by the existing patents which have been granted for the same. The search was one of long and arduous study and labor, and the subject seemed to possess sufficient interest to legal and mechanical men to warrant the publication of the results in such a permanent form that it might be preserved as a convenient and concise book of reference on this subject.

Most of the matter has been published in the columns of "Machinery," and has received the kind commendation of many thoughtful men.

There were one hundred and sixty-four patents examined, and out of this mass, twenty-nine were selected as bearing directly upon the Change Gear problem; the others being for forms of variable speed devices and similar inventions, not properly coming under the head of the Evolution of the Change Gear.

These twenty-nine patents have been very carefully considered and described, their special or distinguishing features illustrated and compared in a conscientious and disinterested manner, which it is hoped, will prove both instructive and useful to those who may be interested in this field of mechanical development.

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Détails de l'édition

• Éditeur: Forgotten Books
• Date d'édition: 2018
• Langue: anglais
• ISBN 10: 1332006256
• ISBN 13: 9781332006250
• Reliure: Broché
• Nombre de pages: 83
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