nches in diameter. The groove were continued on the same pitch, one of these boiler is run under a working pressure of 205 pounds flanges would be cut away. The only solution of the to the square inch. The maximum tractive effort at difficulty was to change the pitch for the first turn daily… … weight of the casting was 7 tons. saving of as high as 1,745 pounds over the Stephen- A Double-Grooved Drum and Cam Used in Striking son gear. The Walschaert gear is also more direct in te Up the Mold. THE WALSCHAERT VALVE ON AMERICAN LOCOMOTIVES its action, the power being transmitted to the valve…
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