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Improvement in Double-Bitted Drills.
Patent for "an easy mode of straightening wells while drilling them through rock or earth, and also for enlarging the same into a cistern when it is desired to keep on hand a large supply of water." (Lines 8-13) Includes instructions and illustrations.
Date:
May 30, 1876
Creator:
Yarbrough, William H.
System:
The Portal to Texas History
Improvement in Mold-Boards for Plows.
Patent for an improved design for plow mold-boards that involves using holes and a water pump to keep the mold-board clear of earth.
Date:
December 30, 1879
Creator:
Fields, John W.
System:
The Portal to Texas History
Improvement in Air-Cooling Apparatus.
Patent for "the construction and arrangement of a refrigerator for the purpose of cooling and maintaining a low and dry temperature, for preserving fresh meats and vegetables, and for cooling rooms for any purpose." (Lines 10-15) Includes instructions and illustrations.
Date:
March 30, 1875
Creator:
Hyatt, Frank A.
System:
The Portal to Texas History