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Improvement in Lever-Powers.

Description: 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
Item Type: Refine your search to only Patent
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