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in subjects: "drilling"  
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Roller Boring-Drill.

Description: Patent for a boring-drill that can be manufactured cheaply. It provides sufficient space for the casing to follow it in order to prevent the walls from caving in. The patent includes instructions and illustrations.
Date: December 1, 1914
Creator: Hughes, Howard Robard
Item Type: Refine your search to only Patent
Partner: UNT Libraries Government Documents Department

Well-Drilling Machine.

Description: Patent for a well-drilling machine with "novel and improved means for manipulating and actuating the drill cable" (lines 11-12), including instructions and illustrations.
Date: August 4, 1914
Creator: Slaughter, George W., Jr.
Item Type: Refine your search to only Patent
Partner: UNT Libraries Government Documents Department
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