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Oil-Expressing Cage and Press.

Description: Patent for improvements to Oil Expressing Cages and Presses "for the extraction of oil from cotton seed cake or the like" (lines 11-12) that allows for multiple oil cakes and press plates which can be "readily inserted in or removed from the press as occasion requires" (lines 22-23).
Date: October 26, 1920
Creator: Henry, Nelson B.
Partner: UNT Libraries Government Documents Department

Pump for Hydraulic Presses

Description: Patent for a hydraulic pump that drives at a uniform speed as the pressure of the press increases, and connects the pistons with two pairs of cylinders moving in opposite cycles.
Date: May 10, 1921
Creator: Henry, Nelson B.
Partner: UNT Libraries Government Documents Department
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