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Clamp for Spirit-Levels.
Patent for clamps for spirit levels that allow a spirit level to be attached directly to a straight edge so that one person could safely use both the straight edge and the spirit level simultaneously. Additionally, the clamp production is simple so it can be produced at a low cost.
Date:
April 30, 1918
Creator:
Bridgman, Jesse Everet
System:
The Portal to Texas History
Pump-Operating Mechanism.
Patent for a pump operating mechanism, which is run by horses going in a circle around the device to power the pump.
Date:
April 27, 1909
Creator:
Siggel, Willie F.
System:
The Portal to Texas History
Tire Bolt Wrench
Patent for a tire bolt wrench. Illustration included.
Date:
April 4, 1905
Creator:
Moore, James R.
System:
The Portal to Texas History
Improvement in Throttle-Valve Stands and Stems.
Patent for "a new arrangement of support for the stem of a throttle-valve, and has for its object to facilitate the lubricating of the screw and cause the parts to be firmly held in place." (Lines 19-23) Includes instructions and illustrations.
Date:
April 2, 1872
Creator:
Compant, John M. & Krauskopf, Engelbert
System:
The Portal to Texas History