Hydraulic Swivel.
Description:
Patent for "a simple, compact, and efficient water-swivel for well-drilling machines, to reduce friction between the water-swivel and the drill-rod, and to provide certain novel and improved details of construction and arrangement." (lines 8-13).
Date:
September 12, 1905
Creator:
Embry, Leonard B.
Partner:
UNT Libraries Government Documents Department