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Trick-Pipe.

Description: Patent for a trick pipe, which has a lid over the pipe bowl that ordinarily would blow off when the pipe is blown into, but when put in the trick position will seal itself on no matter how hard the person blows.
Date: April 7, 1908
Creator: Judson, Fred Irving
Item Type: Refine your search to only Patent
Partner: UNT Libraries Government Documents Department

Switch-Operating Mechanism

Description: Patent for a railroad switch operating mechanism that is operated from the train which can can close a switch accidentally left open.
Date: July 7, 1908
Creator: Hyman, Henry F. & Hay, G. H.
Item Type: Refine your search to only Patent
Partner: UNT Libraries Government Documents Department
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