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Improvement in Gang-Plows.
Patent for "a gang-plow, which is so arranged that the beams can be adjusted sideways and up and down at will, and can be permanently secured in any desired position in either movement." (Lines 17-20) Includes instructions and illustrations.
Date:
November 30, 1869
Creator:
Hall, Thomas J.
System:
The Portal to Texas History
Railroad-Switch.
Patent for improvements in railroad-switches, relating to a simple and more efficient means for throwing a switch of a railway truck, whereby a train of cars or a single car may be switched from the main track to another track or on a siding.
Date:
December 30, 1919
Creator:
Hester, James
System:
The Portal to Texas History
Game Apparatus.
Patent for a game device, designed for any number of players and in a bowling alley setting or similar. Included are illustrations of the device and instructions for building the device and how to play the game.
Date:
March 30, 1880
Creator:
Zanetti, Fortonato Clemente
System:
The Portal to Texas History
Safety Railroad-Switch
Patent for a safety railroad-switch which is meant to prevent vertical displacement.
Date:
March 30, 1915
Creator:
Leach, Felix
System:
The Portal to Texas History