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Automobile-Signal.
Patent for turn signal improvements with an aim to improve visibility of signal and ease of replacement with the goal of communicating vehicular movement and reducing accidents.
Date:
November 15, 1921
Creator:
Squier, William Ernest
System:
The Portal to Texas History
Well-Drill Wrench.
Patent for a well drill wrench that improves upon William Ellinger's patent 1,327,379, issued January 6, 1920. This improvement eliminates friction between the rotatable and stationary parts of the wrench and ensures that the rotatable part is fully supported during its entire rotation, "as when screwing or unscrewing the drill bit" (lines 109-110).
Date:
November 15, 1921
Creator:
Ellinger, William H.
System:
The Portal to Texas History
Toy Aeroplane.
Patent for a new and improved toy airplane to be propelled by the feet and steered by the child seated inside, including illustrations. It "is relatively simple and inexpensive to produce, while also being able to withstand considerable rough handling" (lines 26-28).
Date:
March 15, 1921
Creator:
Paul, Leon R.
System:
The Portal to Texas History