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Valve Gear

Description: Patent for a valve gear. Illustration included.
Date: June 28, 1904
Creator: McCain, Sidney Lea
Partner: UNT Libraries Government Documents Department

Grate-Bar.

Description: Patent for a grate bar for furnaces, which allows for proper air distribution in the furnace.
Date: June 28, 1910
Creator: Wilderspin, Anderson
Partner: UNT Libraries Government Documents Department

Refrigerator-Door.

Description: Patent for individual doors for compartments within a refrigerator, to protect items from being exposed to warm air when the refrigerator door is ajar. This patent also provides for the ability to apply doors as attachments to refrigerators without pre-installed compartment doors.
Date: June 28, 1921
Creator: Jurek, Martin
Partner: UNT Libraries Government Documents Department

Vegetable-Grading Apparatus.

Description: Patent for a vegetable grading apparatus that delivers select grades of vegetables to the picker, separating the majority of vegetables into containers. The apparatus prevents bruising of vegetables and allows the picker to see all sides of the vegetables.
Date: June 28, 1921
Creator: Rigney, Samuel C.
Partner: UNT Libraries Government Documents Department

Lock and Key.

Description: Patent for a lock which requires a key that is adjustable and difficult to duplicate in order to prevent lock picking.
Date: June 28, 1921
Creator: Dove, Bascom A.
Partner: UNT Libraries Government Documents Department

Process and Apparatus for the Utilization of Heat in Oil-Engines.

Description: Patent for an invention that improves the utilization of waste or surplus heat of internal combustion engines, specifically oil-burning engines of the Diesel type. This invention will assist diesel engines to run satisfactorily on lower or heavier-grade engine oils. This assists in the efficiency and production of Diesel engines.
Date: June 28, 1921
Creator: Lucke, Herbert R.
Partner: UNT Libraries Government Documents Department
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