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Pressure-Screw.
Patent for a pressure screw where the screw can freely rotate, and the shoe may pivot slightly. It is also designed for easy maintenance and lubrication of the bearing and to be cheap to manufacture, efficient and durable.
Date:
August 16, 1921
Creator:
Menger, Edward W.
System:
The Portal to Texas History
Improvement in Gun-Locks.
Patent for "a novel application of hair-trigger catch to the main trigger, which operates together with a holder and separate springs." (Lines 30-33) Includes instructions and illustrations.
Date:
August 16, 1870
Creator:
Deutz, Joseph
System:
The Portal to Texas History