Resource Type

Clamp. (open access)

Clamp.

Patent for a new and useful clamp, including instructions and illustrations.
Date: November 15, 1898
Creator: Hauff, Isaac F.
System: The Portal to Texas History
Plow. (open access)

Plow.

Patent for a new and improved plow. This design is "to combine a single and double plow so that they may be used either conjointly or independently of each other, and to provide means for the ready adjustment of the plow-beams with relation to each other and for the adjustment of the shovels so as to present the same at different inclinations for penetrating the ground at various depths" (lines 8-16).
Date: July 15, 1890
Creator: Walton, Sam Houston
System: The Portal to Texas History