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Vacuum-Regulator for Oil-Pumps.

Description: Patent for vacuum regulator for oil pump. This device is simply constructed and easy to operate. It is an automatic cut-off in the vacuum of the pipe line to the pump.
Date: March 12, 1918
Creator: Hobb, James W.
Item Type: Refine your search to only Patent
Partner: UNT Libraries Government Documents Department

Process of Separating Ores &c

Description: Patent for a process of separating oxid or carbonate metallic ores from a surrounding mineral through the use of a mixture of an oily liquid, water, and an alkali metal.
Date: November 12, 1912
Creator: Lockwood, Alfred Arthur
Item Type: Refine your search to only Patent
Partner: UNT Libraries Government Documents Department

Gas-Valve.

Description: Patent for improvement to gas valve "which is adapted to be used in connection with a water heater" (9, 11-12) including description and illustrations.
Date: October 12, 1915
Creator: Cochran, Harry A.
Item Type: Refine your search to only Patent
Partner: UNT Libraries Government Documents Department

Filter.

Description: Patent for Improvements in Filters specifically used to remove "impurities from gasoline and oil, to fit the gasolene or oil for reuse" (lines 11-13).
Date: November 12, 1918
Creator: Caen, George, Sr.
Item Type: Refine your search to only Patent
Partner: UNT Libraries Government Documents Department
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