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Piano-Pedal.

Description: Patent for a piano pedal made of one piece of cast metal to avoid the problem of loose connections between parts over time and which goes in a smaller hole in the bottom of the piano to prevent mice or dust from entering inside the piano.
Date: June 18, 1907
Creator: Norcross, Levi Watson
Partner: UNT Libraries Government Documents Department

Elevator Door and Catch.

Description: Patent for elevator doors and catches by creating a device which can make the elevator door opened and closed automatically. Illustration is included.
Date: June 18, 1901
Creator: McNaught, Ira S.
Partner: UNT Libraries Government Documents Department
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