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Internal-Combustion Engine.

Description: Patent for an internal combustion engine that improves on an explosive engine with two hollow pistons, one of which slides within the other and both are connected to a triple crank shaft, so that they reciprocate simultaneously in opposite directions. The invention improves on the construction, arrangement, and combination of parts of the explosive engine.
Date: October 28, 1913
Creator: Bogusch, Emil Gustave & Slator, M. D.
Partner: UNT Libraries Government Documents Department

Pipe-Clamp.

Description: Patent for a pipe clamp for drawing well casings out of wells that can be used on different size pipes and grips harder as resistance increases.
Date: July 23, 1907
Creator: Benedict, George Spencer
Partner: UNT Libraries Government Documents Department

Milk-Cooler.

Description: Patent for an improvement in milk-coolers “in which water is drawn by capillary attraction from a receptacle placed above the milk-receptacle onto a cloth wrapped around the latter, thus cooling the milk by evaporation.” (Lines 8-12) Illustration is included.
Date: April 7, 1891
Creator: Banks, John F.
Partner: UNT Libraries Government Documents Department

Pipe-Wrench.

Description: Patent for an improved pipe wrench that has "a pair of fixed but reversible jaws, attached to the shank of the wrench on each side thereof, and a movable, hooked jaw pivoted between the heels of the fixed jaws" (lines 15-18).
Date: May 2, 1893
Creator: Smith, Jay & Gage, Charles H.
Partner: UNT Libraries Government Documents Department

Extensible Trestle.

Description: Patent for an improvement to extensible trestles for masonry and carpentryscaffolding and other uses, including both instructions and illustrations.
Date: January 7, 1890
Creator: Bogusch, Robert J.; Bogusch, Gustav & Zincke, August
Partner: UNT Libraries Government Documents Department