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Improvement In Cultivators
Patent for an improved cultivator, with adjustable wheel base, plow height and more (pg 1).
Date:
July 23, 1872
Creator:
Griffith, William H.
System:
The Portal to Texas History
Improvement in Lever-Powers.
Patent for a lever-power which applies "the power and resistance to the lever, so that they will change positions with relation to the fulcrum as the power end of the lever descends" (para. 2). The relation of the lever with the fulcrum is flexible, and allows for increased leverage.
Date:
September 23, 1879
Creator:
Franklin, Mathew Calhoun
System:
The Portal to Texas History