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Automatic Valve

Description: Patent for an automatic valve that uses a lever to open and close quickly, with illustrations.
Date: November 20, 1906
Creator: Pinkerton, Henry S.
Partner: UNT Libraries Government Documents Department

Post Hole Digger

Description: Patent for a post hole digger with an illustration.
Date: November 13, 1906
Creator: Wall, William J.
Partner: UNT Libraries Government Documents Department

Nut-Lock.

Description: Patent for a strong, durable, and inexpensive nut lock that securely locks a nut onto a threaded bolt and can be easily unlocked. It also is simply constructed. It consists of a plank-like spring tongue that fits over the bolt and under the nut.
Date: November 28, 1893
Creator: Taini, John
Partner: UNT Libraries Government Documents Department

Felly-Joint Bridge

Description: Patent for a felly joint bridge designed to strengthen and support vehicle wheels, with illustrations.
Date: November 1, 1910
Creator: Lawrie, Alexander
Partner: UNT Libraries Government Documents Department

Car-Coupling.

Description: Patent for a car-coupling "which will afford means to automatically connect cars and release them in a safe manner from the roof or side of a car" (lines 9-11) and to adapt the improved coupling for connection with one of the ordinary type, including illustrations.
Date: November 3, 1891
Creator: Rohrbach, Gabriel
Partner: UNT Libraries Government Documents Department

Combined Car and Air-Brake Coupling.

Description: Patent for a simple, practical, and easy to use car coupling and in air brake coupling that automatically couples cars together. It can be easily uncoupled from the top or sides of cars. When it couples, it also connects the cars' air pipes together.
Date: November 14, 1893
Creator: Rohrbach, Gabriel
Partner: UNT Libraries Government Documents Department
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