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Valve Structure for Oil-Wells.

Description: Patent for Valve Oil-Wells. This improved Valve Oil Well will increase efficiency and durability of device.
Date: September 19, 1919
Creator: McEvoy, John Philip
Partner: UNT Libraries Government Documents Department

Machine for Cleaning Pipe-Lines

Description: Patent for a machine for cleaning pipe-lines. The machine uses the pipeline as a track, traveling along the track cleaning the pipeline.
Date: July 1, 1919
Creator: Kinzbach, Frank
Partner: UNT Libraries Government Documents Department

Standing-Valve

Description: Patent for improvements to standing valves for the use in high pressure, deep oil wells. Improves the construction, durability, and efficiency. Includes detailed description and illustrations.
Date: unknown
Creator: Henderson, Andrew J.
Partner: UNT Libraries Government Documents Department

Nut-Lock

Description: Patent for a nut lock. Illustrations included.
Date: May 21, 1912
Creator: Lance, Andrew M.
Partner: UNT Libraries Government Documents Department

Tool-Joint.

Description: Patent for improvements in a tool joint that has been adapted to connect sections of a drill used in drilling wells.
Date: June 29, 1920
Creator: Stafford, George A. & Stafford, Roy M.
Partner: UNT Libraries Government Documents Department

Nut-Lock

Description: Patent for a nut lock. Illustrations included.
Date: September 6, 1910
Creator: Lance, Andrew M.
Partner: UNT Libraries Government Documents Department

Saw-Gage.

Description: Patent for improvements on saws by providing “cleaner-teeth and arranged to permit accurate filing of the cleaner-teeth without leaving an undesirable bur and without danger of filing the teeth too short for proper working in a cut.” (Lines 10-14) Illustration is included.
Date: June 11, 1901
Creator: Steele, Daniel Carlos
Partner: UNT Libraries Government Documents Department

Sectional Link.

Description: Patent for a sectional link that has been designed for the use on oil well drilling tools. It is designed to prevent bending of the link and from throwing it out of alignment which can damage the tools it is designed for.
Date: November 5, 1918
Creator: Thomson, John M.
Partner: UNT Libraries Government Documents Department

Specification of Letters Patent.

Description: Patent for improvements in the seals for well screens to provide a permanent joint or seal between the screen and the casing with out blocking passage.
Date: June 21, 1921
Creator: Thomson, Alexander
Partner: UNT Libraries Government Documents Department

Bit Cleaner

Description: Patent for a device that will clean drill bits used for wells without needing to remove them from the ground. Additional aspects of the patent cover fittings and attachments necessary for better operation of the drill bits and the cleaner.
Date: February 17, 1920
Creator: Robichaux, Sosthene
Partner: UNT Libraries Government Documents Department

Core-Drill.

Description: Patent for a core drill for making bore holes in rocks to get out solid samples of the inside of rocks, which has an improved grabbing method for retrieving the piece of rock inside the hole.
Date: August 3, 1909
Creator: McLoughlin, Malacha J. & Wynn, John S.
Partner: UNT Libraries Government Documents Department

Adding-Machine.

Description: Patent for an adding-machine meant to "add fixed amounts of money received or to calculate the number of days a laborer has worked or the number of fractions of days" (lines 14-17). Mounted keys have mechanisms that rotate a ratchet wheel or disk. "Secured to the shaft upon which this ratchet wheel or disk is mounted is a rate-indicator, consisting of a disk divided off into radial sections, and also divided by lines running parallel to the circumference of said disk, dividing the same up into … more
Date: August 27, 1895
Creator: McElyea, James L.
Partner: UNT Libraries Government Documents Department
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