Air-Pump (open access)

Air-Pump

Patent for an automobile air pump that can be power driven from a car motor. This pump can be driven from the rear wheel of a car.
Date: July 15, 1915
Creator: Causey, Thomas S. & Kelley, Robert B.
System: The Portal to Texas History
Process of Picking And Separating Cotton from Bolls. (open access)

Process of Picking And Separating Cotton from Bolls.

Patent for a device to remove plant fiber from picked cotton (referred to as "burs" and "bolls"). The device makes the process of cleaning cotton faster and more efficient.
Date: July 13, 1915
Creator: Meier, John
System: The Portal to Texas History
Differential Driving Mechanism. (open access)

Differential Driving Mechanism.

Patent for a differential driving mechanism which allows axles to rotate at different speeds, includes illustrations.
Date: July 6, 1915
Creator: Lindsley, Berrien M.
System: The Portal to Texas History