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Rock Drill

Description: Patent for a rock drill. This invention is designed for use with a pitman driven by a crank movement or a direct ratchet connected to a driving rod. Illustrations included.
Date: December 24, 1912
Creator: Speer, George F.
Partner: UNT Libraries Government Documents Department

Baling-Press.

Description: Patent for "baling-presses, and has for its objects to provide a simple and efficient apparatus embodying a rebounding plunger; to provide means for regulating the resistance offered to the advance movement of the forward head-block; to provide improved means for tucking the material during the advance movement of the plunger; to provide means for regulating the length of a bale; to provide means for automatically inserting a head-block when a bale of the desired length has been formed; and to … more
Date: December 24, 1895
Creator: Keith, George A.
Partner: UNT Libraries Government Documents Department

Water-Conveyer.

Description: Patent for a water conveyer for irrigation, which has a series of buckets on a conveyer belt which pour over a waterwheel to power the motor of the machine. This model has streamlined the buckets water flow to minimize the power used from the motor.
Date: December 24, 1907
Creator: Dove, John Oliver & Wirsing, Charley
Partner: UNT Libraries Government Documents Department

Hydraulic Pressure and Time Indicator

Description: Patent for hydraulic pressure and time indicator for "recording the times when hydraulic cylinders are in operation and to indicate when the cylinders commence work or reach the required pressure" (lines 10 - 14).
Date: December 24, 1918
Creator: Helm, Clyde D.
Partner: UNT Libraries Government Documents Department
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