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Oil-Expressing Cage and Press.
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.
System:
The Portal to Texas History
Pump for Hydraulic Presses
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.
System:
The Portal to Texas History
Bookbinding
This is a letter patent for the bookbinding invention as a means for holding books, pamphlets, catalogs, and other similar paper materials together. The purpose of this invention is to make it possible to place additional material inside the same covers, and with the original contents of a book without breaking or tearing the binding.
Date:
June 22, 1911
Creator:
Robinson, Edward K.
System:
The Portal to Texas History