LOCOMOTIVE VALVE-GEARS COMPENDIA

By Orrin G. Seaver
Published on November 1, 1971

958 Sheridan Avenue Ypsilanti, Michigan 48197

Valve gears, their design, their operation and their relative
efficiency have been an intriguing study and a serious problem that
have eventuated into a wide variety of inventions. From the time of
the building of the first locomotive, the method employed to
actuate the valves that are required to supply and regulate steam

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