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Description: Patent for an improved version of a pump that includes two pistons in order to eliminate both intake and discharge valves.
Date: June 15, 1915
Creator: Sherman, J. M.
Partner: UNT Libraries Government Documents Department

[Water Barrel and Pump]

Description: A large wooden water barrel set on high posts receives water via a pump mechanism below it. A pump house is built around the well. To the left is a utility building which appears to have pipes going to the barrel. The time and place of this water utility are unknown.
Date: unknown
Partner: Marshall Public Library

Ratchet Die-Stock

Description: Patent for improvement on the usage of die-stocks which are used to cut and thread metal objects such as pipes.
Date: July 22, 1919
Creator: Hestand, Rue S.
Partner: UNT Libraries Government Documents Department


Description: Patent for shade-brackets which connects window shades or blinds to a wall or ceiling
Date: August 26, 1919
Creator: Overman, Benjamin Franklin
Partner: UNT Libraries Government Documents Department

Buttoning and Gripping Device for Artificial Arms

Description: Patent for a gripping device that attaches to an artificial arm. The two main elements consist of a support structure with a jaw, and another element with a movable jaw. A buttoning device is mounted to the structure and functions independently of the two jaws.
Date: April 9, 1918
Creator: Corley, Quentin D.
Partner: UNT Libraries Government Documents Department
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