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in subjects: "switches"  
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Switch.

Description: Patent for a switch mechanism for use on railroads. The switch can be installed without cutting the railroad tracks. Instructions and illustrations are included.
Date: March 20, 1917
Creator: Allen, Gus V.
Item Type: Refine your search to only Patent
Partner: UNT Libraries Government Documents Department

Railroad-Switch.

Description: Patent for a pressure triggered railroad switch that attaches more easily to the tracks and automatically closes when the pressure of the railroad cars is taken off of it.
Date: March 12, 1907
Creator: Madeley, George E.
Item Type: Refine your search to only Patent
Partner: UNT Libraries Government Documents Department
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