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Sulfuric-Acid Process of Extracting Precious Metals From Solutions

Description: Patent for "new and useful Imporivements in Processes of Recovering Precious Metals from Their Solutions, and which I designate as the 'Sulfuric-Acid Process;' [...] to separate the precious metals from their cyanid solutions in a rapid and thorough matter and to recover the precious metals from solutions thereof." (lines 5-8 & 22-26)
Date: June 23, 1903
Creator: Bahn, Gustavus A.
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Partner: UNT Libraries Government Documents Department

Generating Oil Burner

Description: Patent for generating oil burner. This invention "relates to apparatus by which steam is generated and petroleum or a hydrocarbon reduced to vaporous condition and mixed or combined with the steam" (line 8-12). Illustrations included.
Date: May 23, 1905
Creator: Spiller, Philip Samuel & Haldeman, Horace P.
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Partner: UNT Libraries Government Documents Department

Cotton-Chopper

Description: Patent for a cotton chopper designed so that the blade moves "transversely across a standing row of plants" (lines 15-16). Illustrations included.
Date: February 23, 1909
Creator: Ellis, Thomas Henry
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Partner: UNT Libraries Government Documents Department

Coupling-Pin.

Description: Patent for a coupling pin for railroad cars, which prevents the coupling from coming loose accidentally by having a key which locks the coupling in place and can only be undone by the cars operating systems. when it is time to disconnect the car.
Date: July 23, 1907
Creator: Yeiser, John Clarke
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Partner: UNT Libraries Government Documents Department

Churn-Dasher

Description: Patent for an improved churn dasher "to thoroughly agitate the cream at the center of the churn-body and also around the bottom of the walls thereof" (lines 13-15) and "also to cause tangential streams or currents at the bottom of the churn, so as to thoroughly agitate all of the cream and effectively intermingle the air therewith" (lines 18-22), including illustrations.
Date: October 23, 1900
Creator: Franklin, Edward R.
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Partner: UNT Libraries Government Documents Department
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