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Draft-Equalizer. (open access)

Draft-Equalizer.

Patent for Draft Equalizer. Patent states this invention "relates to the new and useful improvements in draft-equalizers" (lines 10-11). Includes instructions and illustrations.
Date: February 20, 1918
Creator: Dudley, Thomas J. & Bryant, Marvin H.
System: The Portal to Texas History
Water-Gage. (open access)

Water-Gage.

Patent for a water-gage measuring the height or volume of water in a steam boiler, particularly those "held closed by the weight of the operating handle" (lines 11-12). The device is designed for simple manufacture and easy assembly & disassembly without tools, and features a valve seat that stays in place, illustrations included.
Date: December 30, 1919
Creator: Leidecker, Helmoth M.
System: The Portal to Texas History