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Other Modern Radial Valve
Gears for Locomotives

A PRACTICAL TREATISE ON THE LOCOMOTIVE VALVE

ACTUATING MECHANISM INVENTED BY

ni EGIDE WALSCHAERT
With the History of Its Development and Its Evolution into
the Mechanically Correct Locomotive Valve

Gear of the Present Day.
IN FIVE GENERAL DIVISIONS, EMBRACING :
Analysis of the Walschaert Valve Motion.-Designing and Erect.
ing the Gear.-Proofs of the Superiority of the Walschaert
Gear in Locomotive Service. — Catechal Questions

and Answers for Instruction and Examination.
Modern Radial Valve Gears Other than the Walschaert, with Full
Explanations, and Questions and Answers relative to Break-

downs and seir Repair of such Gears, while on the Road.

BY W.W.WOOD, Air Brake Inspector

SCIENCE

THIRD EDITION, REVISED AND ENLARGED
Fully Illustrated with Sketches and Diagrams and Containing
Large Folding Plates and Diagrams of Different Types of the
Walschaert and Other Radial Valve Motions, with Mov-

able Cardboard Working Models of the Valves.

NEW YORK
THE NORMAN W. HENLEY PUBLISHING CO.
4 West 4.5 th Street,

19 20

COPYRIGHT 1906 AND 1912

BY THE NORMAN W. HENLEY PUBLISHING CO.

Composition. Printing and Electrotyping by PUBLISHERS PRINTING COMPANY, New York, U, S. A.

PREFACE

SINCE the first edition of this book was printed the Walschaert valve gear has been adopted, practically to the exclusion of the old link motion, on nearly every railroad in America; and its success, together with the actual necessity for an outside valve gear on the extremely large locomotives now in general use, has stimulated the development of other styles of radial valve gear of which the two most successful of this type are fully described in the present edition, with questions and answers explaining the proper method of procedure in cases of breakdowns of either style of gear while on the road.

And while valve setting is becoming a lost art except to the back-shop man since the general advent of radial gears, the question as to how valves with the Walschaert gear may be “set” is asked so often that it is now fully answered in this edition; and the knowledge is of decidedly more importance to the shop man at present, than to the locomotive engineer.

THE AUTHOR. March, 1920

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