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Engine.
Patent for a new engine designed to maximize power output by using a single crank's bearing surface and increase the crank power without lengthening the piston travel.
Date:
October 18, 1921
Creator:
Ingram, Joseph D.
System:
The Portal to Texas History
Ditching-Machine
Patent for "a machine for digging ditches or trenches of any desired depth or width, for purposes of irrigation or drainage or pipe-laying, or for building earth fences on lands, or throwing up fortifications, or for making other excavations of like general nature" (lines 7-13).
Date:
December 18, 1888
Creator:
Edwards, Charles Clark
System:
The Portal to Texas History