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Combination Set-Collar for Well-Strainers. (open access)

Combination Set-Collar for Well-Strainers.

Patent for a combination set-collar for well-strainers that combines a back pressure valve and a washer pipe which allows for the cleaning of the strainer.
Date: November 25, 1919
Creator: Thompson, Alexander
System: The Portal to Texas History
Valve Structure for Oil-Wells. (open access)

Valve Structure for Oil-Wells.

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
System: The Portal to Texas History
Machine for Cleaning Pipe-Lines (open access)

Machine for Cleaning Pipe-Lines

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
System: The Portal to Texas History