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Pump-Jack.

Description: Patent for improvements to pump jacks. Simple gravity actuated devices are provided to aid the power mechanism of the pump jack, resulting in smoother, more even operation.
Date: July 15, 1919
Creator: Dayton, William L.
Item Type: Refine your search to only Patent
Partner: UNT Libraries Government Documents Department

Oil-Converting Apparatus.

Description: Patent for an apparatus that can be built at moderate cost, which will enable a high rate of commercially efficient work to reduce "the specific gravity of various grades of hyrdo-carbon oils, especially those of a semi-refined character" (lines 22 - 24).
Date: October 28, 1919
Creator: Adams, Joseph H.
Item Type: Refine your search to only Patent
Partner: UNT Libraries Government Documents Department

Sample-Taking Device.

Description: Patent for a device that helps with sample collection at oil drilling sites. The tool is cylindrical and can be placed in the ground to help with sample collection. This patent includes examples of how the tool can be used and tool specifications.
Date: April 15, 1919
Creator: Church, Walter Lee
Item Type: Refine your search to only Patent
Partner: UNT Libraries Government Documents Department

Device for Unscrewing and Withdrawing Pipe.

Description: Patent for a device for unscrewing and withdrawing pipe from wells, mines, or other similar uses. This tool is attached at the end of a drill stem and threaded in the ordinary right hand direction to unscrew and withdraw.
Date: July 29, 1919
Creator: Fletcher, Harold W.
Item Type: Refine your search to only Patent
Partner: UNT Libraries Government Documents Department
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