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Classifier and Separator.

Description: Patent for classifiers and separators used in mining to separate solids and liquids in the tank. It allows for easy removal and replacement of parts as they wear.
Date: March 19, 1918
Creator: Allen, Charles
Partner: UNT Libraries Government Documents Department

Car Brake.

Description: Patent for a new and improved car-brake. This design consists in "[t]he combination, with the transverse beam of the truck, of the levers pivoted to the under side of the same, the brake-shoes, the pitmen connecting the brake-shoes with the levers, the straps secured to the beam, the retaining-rods having their ends pivoted to the pitmen and the straps, and devices for operating the levers" (lines 94-101).
Date: March 19, 1889
Creator: Mayer, Charles
Partner: UNT Libraries Government Documents Department
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