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Автор: David Allan Low
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isbn: 4057664594303
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       David Allan Low

      An Introduction to Machine Drawing and Design

      Published by Good Press, 2021

       [email protected]

      EAN 4057664594303

       AN INTRODUCTION

       MACHINE DRAWING

       DESIGN

       DAVID ALLAN LOW

       PREFACE.

       PREFACE TO THE THIRD EDITION.

       AN INTRODUCTION

       MACHINE DRAWING AND DESIGN.

       I. INTRODUCTION.

       II. RIVETED JOINTS.

       III. SCREWS, BOLTS, AND NUTS.

       IV. KEYS.

       V. SHAFTING.

       VI. SHAFT COUPLINGS.

       VII. BEARINGS FOR SHAFTS.

       VIII. PULLEYS.

       IX. TOOTHED WHEELS.

       X. CRANKS AND CRANKED SHAFTS.

       XI. ECCENTRICS.

       XII. CONNECTING RODS.

       XIII. CROSS-HEADS.

       XIV. PISTONS.

       XV. STUFFING-BOXES.

       XVI. VALVES.

       XVII. MATERIALS USED IN MACHINE CONSTRUCTION.

       XVIII. MISCELLANEOUS EXERCISES.

       APPENDIX A.

       SCIENCE AND ART DEPARTMENT, SOUTH KENSINGTON.

       Syllabus.

       APPENDIX B.

       EXAMINATION PAPERS SET BY THE SCIENCE AND ART DEPARTMENT.

       INDEX

       TEXT-BOOKS OF SCIENCE

       SCIENTIFIC CLASS-BOOKS.

       LONGMANS' ELEMENTARY SCIENCE MANUALS.

       Table of Contents

      TO

      MACHINE DRAWING

       Table of Contents

      AND

      DESIGN

       Table of Contents

      BY

      DAVID ALLAN LOW

       Table of Contents

      (WHITWORTH SCHOLAR), M. INST. M.E.

      HEAD MASTER OF THE PEOPLE'S PALACE TECHNICAL SCHOOLS, LONDON

       AUTHOR OF 'A TEXT-BOOK ON PRACTICAL SOLID OR DESCRIPTIVE GEOMETRY'

       'AN ELEMENTARY TEXT-BOOK OF APPLIED MECHANICS' ETC.

      FOURTH EDITION

      LONDON

       LONGMANS, GREEN, AND CO.

       AND NEW YORK: 15 EAST 16th STREET

       1890

      PRINTED BY

       SPOTTISWOODE AND CO., NEW-STREET SQUARE

       LONDON

       Table of Contents

      It is now generally recognised that the old-fashioned method of teaching machine drawing is very unsatisfactory. In teaching by this method an undimensioned scale drawing, often of a very elaborate description, is placed before the student, who is required to copy it. Very often the student succeeds in making a good copy of the drawing placed before him without learning very much about the object represented by it, and this state of matters is sometimes not much improved by the presence of the teacher, who is often simply an art master, knowing nothing about machine design. It is related of one school that a pupil, after making a copy of a particular drawing, had a discussion with his teacher as to whether the object represented was a sewing machine or an electrical machine. Evidently the publisher of the drawing example in this case did not adopt the precaution which a backward student used at an examination in machine design: he put on a full title above his drawing, for the information of his examiner.

      Now,