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Hoisting Drum.
Patent for an invention that "relates to improvements in hoisting drums" (line 15-16). Structure, objective, and illustrations of hoisting drums are included.
Date:
July 3, 1917
Creator:
Howard, Henry Fischer
System:
The Portal to Texas History
Lifting Clamp for Well Casings
Patent for a lifting clamp for well casings. It is designed to make the lifting of well casings easier and safer for those attaching the clamp to the lifting mechanism.
Date:
July 3, 1917
Creator:
Kibele, Eugene
System:
The Portal to Texas History