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Screw Propeller.
Patent for a new and improved screw propeller. This design "connect[s] propellers on the opposite sides of a vessel with one another and with a stern propeller, so that they will act at the same time upon different parts of the vessel in urging her forward," which leads to increased speed (lines 7-11).
Date:
March 20, 1883
Creator:
Gartner, John
System:
The Portal to Texas History
Electric Appliance for Horses.
Patent for an electric appliance for stallions meant to stop the horse from masturbating. It is a box underneath the horse that is secured around the horse. When the horse gets an erection, the penis will touch the lower plate of the box and cause the circuit to close and shocks the animal.
Date:
March 20, 1894
Creator:
King, George R.
System:
The Portal to Texas History