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Drill-Bit
Patent for a drill bit for oil wells that provides a way for the bit to be lubricated while in use to prevent the adhesion of gummy substances.
Date:
June 4, 1918
Creator:
Kilgore, John G.
System:
The Portal to Texas History
Mail-Handling Apparatus
Patent for a mail handling apparatus for storing and delivering mail to trains that is on an automated timer with the train schedule.
Date:
June 4, 1912
Creator:
Mainer, William L.
System:
The Portal to Texas History
Mail-Receiving Apparatus
Patent for a mail receiving apparatus for use with trains that automatically removes mailbags from the train.
Date:
June 4, 1912
Creator:
Mainer, William L.
System:
The Portal to Texas History
Wrench.
Patent for "a wrench in which the ratchet is inclosed, so that none of its parts will be exposed to the action of dust" (lines 16-18), provides ample lubrication, and ease of inspection. Includes instructions and illustrations.
Date:
June 2, 1912
Creator:
Sherman, Lothrop C.
System:
The Portal to Texas History