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Change-Speed Mechanism for Tractor-Truck Motor-Vehicles

Patent for a machine that can be used either as a truck for traveling over highways or as a tractor for farm work.

Date: October 28, 1919

Creator: Miller, William J.

Partner: UNT Libraries Government Documents Department

Building Construction.

Patent for "new and useful improvements in building construction" (lines 9-11), including illustrations.

Date: September 28, 1920

Creator: Laughlin, Edward A.

Partner: UNT Libraries Government Documents Department

Train-Pipe Coupling.

Patent for a train pipe coupling that holds tightly together.

Date: March 28, 1911

Creator: Moss, Dexter W. & Olschner, Clarence E.

Partner: UNT Libraries Government Documents Department

Patent for a new mill-carriage-wheel guard "to prevent obstruction falling on the wheels or on the [railroad] track, this guard also carries scrapers in front and in rear and on each side of the wheel, whereby the obstructions are scraped off the track." (Lines 23-28) This guard can be used with a wood-working machine carriages and/or rail.” Illustration is included.

Date: April 28, 1891

Creator: Zimmerman, Joseph W.

Partner: UNT Libraries Government Documents Department

Process of Making Aluminum Chlorid.

Patent for the process of making aluminum chlorid (chloride) wherein solid materials are preheated to alleviate heating supply issues during the process.

Date: May 28, 1918

Creator: King, George H. & Roberts, Gerald I.

Partner: UNT Libraries Government Documents Department