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Portable Locomotive-Valve-Seating Machine.

Description: Patent for improvements to valve-seating machines that allows for them to be constructed simply.
Date: July 19, 1921
Creator: Mooney, James J. & Bennet, Richard E.
Partner: UNT Libraries Government Documents Department

Traction Device.

Description: Patent for a traction device to be attached to the wheels of a motor vehicle to provide greater traction than the treads of the wheels. The traction device is meant to attach to and detach from the wheels as needed and to be adjustable to the dimensions of the wheels and their treads.
Date: July 5, 1921
Creator: Houston, Hugh Edward
Partner: UNT Libraries Government Documents Department
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