Flour-Milling Machinery. (open access)

Flour-Milling Machinery.

Patent for flour milling machinery with reduced costs of equipment and operation, less required space, and improved quality and quantity of flour.
Date: May 10, 1921
Creator: Smith, George T.
System: The Portal to Texas History
Pump-Plunger (open access)

Pump-Plunger

Patent for a pump-plunger, concentrating on advancements in the design, particularly catering to deep well operations and environments with challenging conditions, such as oil and water wells where fluids are mixed with sand, sediment, or debris.
Date: October 18, 1921
Creator: Miller, Frank J.
System: The Portal to Texas History
Carbureter (open access)

Carbureter

Patent for a carburetor. This carburetor is designed to be used with crude oil, and to be easily constructed and operated.
Date: September 6, 1921
Creator: Walker, Sanders
System: The Portal to Texas History
Truck. (open access)

Truck.

Patent for an improved truck in which the load can be moved to be easily loaded or unloaded by one person, including illustrations.
Date: April 19, 1921
Creator: Ortgier, Walter C.
System: The Portal to Texas History
Well-Drill Wrench. (open access)

Well-Drill Wrench.

Patent for a well drill wrench that is easily adjustable for different sized drill chucks. Its designs makes rotating the wrench smoother and less likely to slip off of drill chucks.
Date: November 8, 1921
Creator: Ellinger, William H.
System: The Portal to Texas History
Traction Device. (open access)

Traction Device.

Patent for a traction device to be attached to the wheels of a motor vehicle to provide greater traction than the treads of the wheels. The traction device is meant to attach to and detach from the wheels as needed and to be adjustable to the dimensions of the wheels and their treads.
Date: July 5, 1921
Creator: Houston, Hugh Edward
System: The Portal to Texas History
Toy Aeroplane. (open access)

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
Well-Drill Wrench. (open access)

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
Portable Locomotive-Valve-Seating Machine. (open access)

Portable Locomotive-Valve-Seating Machine.

Patent for improvements to valve-seating machines that allows for them to be constructed simply.
Date: July 19, 1921
Creator: Mooney, James J. & Bennet, Richard E.
System: The Portal to Texas History