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Hose-Clamp

Description: Patent for hose-clamp. A hose clamp designed to stay attached to a drill even when the pressure of the fluid running through it is high.
Date: October 30, 1917
Creator: Bennett, Clarence D.
Partner: UNT Libraries Government Documents Department

Piston.

Description: Patent for improvements in pistons (also called follower heads) for pump cylinders that are more designed for oil wells. The principal object of this invention is to provide a means for renewing parts of the head to restore the same to its original diameter after it has become worn and loose.
Date: January 13, 1920
Creator: Miller, William James
Partner: UNT Libraries Government Documents Department
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