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Rotary Boring Drill

Description: Patent for rotary boring drill with explanation and the accompanying illustrations.
Date: November 6, 1917
Creator: Hughes, Howard R
Partner: UNT Libraries Government Documents Department

Blade Holder.

Description: Patent for an improved blade-holder that is simple in construction and can be manufactured at a lower cost. It is designed to "permit of the blades being readily and quickly assembled in the holder and permanently clamped therein to prevent any accidental displacement or movement of the blades from such holder during the stropping." (lines 16-21), including illustrations.
Date: November 6, 1917
Creator: Harriss, Wade H.
Partner: UNT Libraries Government Documents Department

Belt Tightener for Pumps.

Description: Patent for belt tighteners for well pumps which decreases the amount of force necessary to tighten a pump. Patent includes instructions and illustrations.
Date: March 6, 1917
Creator: Layne, Mahlon E.
Partner: UNT Libraries Government Documents Department
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