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Centrifugal Pump

Description: Patent for centrifugal pump design meant to improve upon past models in which pieces of the pump wear out over time.
Date: December 17, 1918
Creator: Duda, Oswald
Partner: UNT Libraries Government Documents Department

Automatic Fan

Description: Patent for mechanical improvements in "automatic fans intended especially for use on beds, whether in houses or in sleeping-cars" (lines 7-9).
Date: December 17, 1889
Creator: Comminge, Frank
Partner: UNT Libraries Government Documents Department

Draft Attachment for Motor-Vehicles.

Description: Patent for a draft attachment by which a motor vehicle may "pull itself free when its traction wheels have become embedded in a soft or muddy road" (lines 14-16).
Date: May 17, 1921
Creator: Worsham, Louis W.
Partner: UNT Libraries Government Documents Department

Carbon Holder for Electric Arc Lamps

Description: Patent for improvements made to the carbon holder for electric arc lamps to improve efficiency in replacing the lamps. To improve upon the current design, the patent illustrates and describes a new level clutch system to allow movement, as opposed to the gravity-based design previously implemented.
Date: March 17, 1914
Creator: Lacy, Benjamin Burton & Elrod, Henry E.
Partner: UNT Libraries Government Documents Department

Compound Air-Compressor.

Description: Patent for an improved Compound Air-Compressor by having four cylinders, in pairings of a high pressure and a low pressure cylinders. The air from the low pressure cylinder will be fed to the high pressure cylinder. The pistons will work in succession rather than simultaneously.
Date: February 17, 1920
Creator: Jones, Oceola
Partner: UNT Libraries Government Documents Department

Well Mechanism

Description: Patent for a mechanism for drawing water from wells. Illustrations included.
Date: May 17, 1910
Creator: Layne, Mahlon E.
Partner: UNT Libraries Government Documents Department
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