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Pump-Controlling Switch.

Description: Patent for a pump controlling electric switch that automatically turns on the pump when water covers it and turns off the switch when it is dry.
Date: September 26, 1911
Creator: Gamer, Charles
Partner: UNT Libraries Government Documents Department

Safety-Catch for Breastpins, &c.

Description: Patent for a safety catch for breast pins, brooches, and other jewelry, that, while easy to easy to use, will not come lose during normal wear. It uses a rigid guard and spring to hold the tongue of the pin in place until released with a lever.
Date: September 19, 1911
Creator: Ferruggiari, Cesar
Partner: UNT Libraries Government Documents Department

Cotton-Chopper.

Description: Patent for a cotton chopper with an adjustable disk.
Date: September 5, 1911
Creator: Burton, Walter C.
Partner: UNT Libraries Government Documents Department
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