1 Matching Results
Results open in a new window/tab.
Results:
1 - 1 of
1
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