Resource Type

Draft-Equalizer (open access)

Draft-Equalizer

Patent for a device that can be attached to the draft tongue of an animal-drawn agricultural machine to equalize resistance and allow it to be drawn evenly in a straight line.
Date: December 25, 1917
Creator: Butts, Jim P.
System: The Portal to Texas History
Low-Pressure Tire-Signal. (open access)

Low-Pressure Tire-Signal.

Patent for a device that attaches to the valve of an automobile tire and creates a warning noise if the tire pressure is too low. Includes instructions and illustrations.
Date: December 5, 1911
Creator: Collins, Joseph M.
System: The Portal to Texas History
Sash Fastener (open access)

Sash Fastener

Patent for a sash fastener. The invnetion is designed to be of durable use as a window sash fastener. Illustration included.
Date: December 24, 1912
Creator: Flaniken, William F.
System: The Portal to Texas History