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Wrench.
Patent for a new and improved wrench. This design "consists in the combination of the main bar, which is provided with a head having a suitable recess to catch over nuts, with a sliding head, which has two surfaces to act in connection with opposite ends of the head, but out of line with each other, and a spring-actuated catch, which catches in suitable ratchets made in the main bar, so as to hold the sliding head in position" (lines
Date:
May 22, 1883
Creator:
Hamrick, Jerome Miller.
System:
The Portal to Texas History
Post Hole Auger
Patent for an improved post-hole digger/auger with multiple blades that cut in a spiral pattern and has the blades adjust and lock on the base. The blade shanks form a cage and keeps dirt from clogging the blades.
Date:
May 22, 1915
Creator:
Hoover, Orville M. & Ardery, Sarah, J.
System:
The Portal to Texas History
Ice-Machine
Patent for an icebox that can be combined with a refrigerator. The icebox will spray the ammonia compressor coil with water, as well as inducing a forced circulation of water in the icebox's freezing tank.
Date:
May 22, 1920
Creator:
Grant, Willburn C.
System:
The Portal to Texas History