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Locomotive Drifting-Valve.

Description: Patent for locomotive drifting valves to admit saturated steam from the boiler to the steam chamber of the valve chest and cylinders while the locomotive is running with the main steam throttle closed.
Date: January 8, 1918
Creator: Meister, Alfred A.; Surles, John W. & Boyle, Edmund F.
Partner: UNT Libraries Government Documents Department

Device For Extracting Cores From Wells.

Description: Patent for a device to obtain samples of the core formed by drilling tools at any depth and withdrawing the same to the surface during the process of drilling.
Date: January 8, 1918
Creator: Dodds, Redus D.
Partner: UNT Libraries Government Documents Department
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