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Tie-Plate

Description: Patent for a tie plate that sticks firmly to the ties, keeps out moisture, and is lighter than other tie plates.
Date: July 16, 1912
Creator: Walton, Jay W. & Dayton, William H.
Partner: UNT Libraries Government Documents Department

Hopper-Door.

Description: Patent for a hopper door especially designed to be used "with a vertically movable weighing hopper adapted to receive and weigh cotton seed" (lines 10-12). The specifics of how the door is hinged and operates is especially important to the design.
Date: July 16, 1918
Creator: Peck, James F.
Partner: UNT Libraries Government Documents Department

Compressed-Air and Steam Apparatus for Sinking Wells

Description: Patent for "a simple and inexpensive apparatus for drilling the rock and earth until sufficient loose material has accumulated in the shaft, and then remove such material by the pressure of an aeriform fluid - such as steam or compressed air" (lines 23-29).
Date: July 16, 1889
Creator: Goodrich, Hervey K.
Partner: UNT Libraries Government Documents Department
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