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3 Matching Results
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Canal or Ditch Digging Machine.
Patent for a canal or ditch digging machine that has a carriage and a mechanism that draws the carriage across the ground, and a boring-tool beneath the carriage. The boring-tool can bore at an adjustable angle.
Date:
August 20, 1895
Creator:
Hoefs, Otto
System:
The Portal to Texas History
Method of Sampling.
Patent for improving methods of boring wells by "raising the cuttings from an earth boring drill to the surface" (lines 70-71), including illustrations.
Date:
July 20, 1920
Creator:
Carmichael, Robert E.
System:
The Portal to Texas History
Oar Lock Attachment.
Patent for an oar-lock attachment that allows the oar to be removed but not easily disconnected, using a hook on the oar with a spring plate and an eye on the boat gunwale, with illustrations.
Date:
December 20, 1892
Creator:
Livingston, Joseph R.
System:
The Portal to Texas History