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Gas-Vent for Molds.

Description: Patent for a gas-vent for molds. Its object is "to provide a simple and cheap construction whereby free escape of the gas or air is permitted form the mold into which molten metals...are to be poured for the purpose of forming a casting" (lines 12-18). Construction of the vent may vary.
Date: February 2, 1897
Creator: Streetman, Willard
Partner: UNT Libraries Government Documents Department

Furnace.

Description: Patent for a furnace used in steel making operations to "enable...uniform heating and the dissipation of the black spots" created on some heated materials during the heating process by means of a "lifting means or moveable hearth."
Date: May 18, 1915
Creator: Moore, Ralph S
Partner: UNT Libraries Government Documents Department

Metallurgical Process

Description: Patent for improvements to metallurgical process that involves "seperating metals from their ores" (lines 13-14) under the right conditions and seeks to lower the costs of the process.
Date: August 27, 1918
Creator: Dawson, Oliver B.
Partner: UNT Libraries Government Documents Department

Converter and Smelter.

Description: Patent for an improved converter and smelter mechanism that processes crushed ore, including illustrations.
Date: August 26, 1919
Creator: Miller, Theodore
Partner: UNT Libraries Government Documents Department

Caustic-Soda Process.

Description: Patent for mixing anhydrous sodium-sulfate with saw dust, heating the mixture in a furnace to 880 degrees Celsius and letting it partially cool. This process will convert the sodium-sulfate to sodium sulfide which when combined with the saw dust creates a liquid which will not oxidize because of the saw dust. The saw dust prevents the mixture from becoming volatile. When lime is added to the mixture then caustic soda is created.
Date: September 7, 1915
Creator: Hirt, Jules Hector
Partner: UNT Libraries Government Documents Department
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