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Compound Valve

Description: Patent for an invention with improvements of devices that employed for controlling the flow of liquid under high pressure which simplify and improve the construction.
Date: October 28, 1918
Creator: Cherry, Joseph C.
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Partner: UNT Libraries Government Documents Department

Air Pump

Description: Patent for an air pump designed to have a strong cylinder and be able to equal quantities of air upon both the upward and downward motion of the piston.
Date: October 28, 1919
Creator: Keating, Paul W.
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Partner: UNT Libraries Government Documents Department

Antifriction Hollow-Tube Sucker-Rod for Deep Wells

Description: Patent for a "simple and inexpensive means for coupling the tubular sections of the sucker rod together and guiding said rod with little or no friction into the well casing or tube" (lines13-17). This object is to be used in "pumping water, oil, and other liquids from deep wells"(lines 11-12).
Date: October 15, 1918
Creator: Black, William L.
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Partner: UNT Libraries Government Documents Department

Armor For Pneumatic Tires.

Description: Patent for armor for pneumatic tires to prevent puncturing of the inner inflatable tube. To also provide anti-skidding lugs which connect to the flexible armor embodied in the tire casing.
Date: October 16, 1917
Creator: Chilton, William G. & Hobgood, John H.
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Partner: UNT Libraries Government Documents Department

Apparatus for Hoisting Liquids from Wells.

Description: Patent for an “apparatus for raising liquid from wells by means of a compressed fluid, such as air or other vapors or gas“ (lines 9-12). The apparatus leaves liquid from the well under normal pressure during hoisting or pumping, and allows for varying amounts of liquid to be extracted.
Date: October 28, 1913
Creator: McCall, Duncan D.
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Partner: UNT Libraries Government Documents Department

Apparatus for Making Lard Substitute

Description: Patent for an apparatus to produce a lard substitute from cotton seed oil. "An important object of this invention is to provide apparatus of the above mentioned character, which is simple in construction, cheap to manufacture, and continuous in operation."
Date: October 6, 1914
Creator: Chisholm, Jesse C.
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Partner: UNT Libraries Government Documents Department

Apparatus for Transmitting Sound-Waves

Description: Patent for transmitting sound waves by magnetic induction and to "furnish an apparatus by which these different vibrations can be heard at the receiving end" (lines 20-22). Includes descriptions and illustrations.
Date: October 17, 1911
Creator: Harvey, Fred Brown
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Partner: UNT Libraries Government Documents Department
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