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Nut-Lock
Patent for a nut lock. Illustrations included.
Date:
May 21, 1912
Creator:
Lance, Andrew M.
System:
The Portal to Texas History
Standing-Valve Structure.
Patent for a standing valve structure "which serves as a coupling between the working barrel (of a pump) and strainer member, to effectively exclude foreign matter" (lines 16-19) including instructions and illustrations.
Date:
May 7, 1918
Creator:
Ewing, Samuel D.
System:
The Portal to Texas History