1 Matching Results
Results open in a new window/tab.
Results:
1 - 1 of
1
Pump-Actuating Mechanism.
Patent for improving measuring pumps "by providing a pump actuating means so constructed that a continuous movement of the crank in one direction will cause a reciprocation of the piston in both directions" (lines 29-33), with illustrations.
Date:
April 19, 1921
Creator:
Dean, Robert A.
System:
The Portal to Texas History