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Piston Ring

Description: Patent for improvements to piston rings to reduce leakage through piston grooves, rings, and joints.
Date: April 17, 1920
Creator: Olsen, Jens J. & Edwards, Lewis E.
Partner: UNT Libraries Government Documents Department

Rotary Engine.

Description: Patent for an improved rotary engine which overheats less, reduces the space between the piston and cylinder, and is easy to construct and operate.
Date: April 27, 1920
Creator: Jefferies, Charlie Q.
Partner: UNT Libraries Government Documents Department

Saw-Table Gage.

Description: Patent for a saw-table cutting stop that can be very quickly set and which automatically indicates the distance from the stop to the saw.
Date: April 19, 1921
Creator: Krocker, Adolf G.
Partner: UNT Libraries Government Documents Department

Rotary Cutting Device for Razors.

Description: Patent for a shaving razor designed with a "cylindrical outer surface adapted to rotate in contact with the skin" (line 111-112) which allows for safer and more efficient shaving, includes illustrations.
Date: April 27, 1920
Creator: Jones, Sidney, P.
Partner: UNT Libraries Government Documents Department

Sample-Taking Device

Description: Patent for new and useful improvements for devices to take samples from wells. Specifically designed to take samples from hard formations, such as rock or other hard surfaces, being pierced from the drill from any depth in a well.
Date: April 5, 1921
Creator: Dodds, Redus D.
Partner: UNT Libraries Government Documents Department

Truck.

Description: Patent for an improved truck in which the load can be moved to be easily loaded or unloaded by one person, including illustrations.
Date: April 19, 1921
Creator: Ortgier, Walter C.
Partner: UNT Libraries Government Documents Department

Truss.

Description: Patent for a new truss designed to hold ruptures without discomfort, suitable for single and double ruptures. The truss features a novel spring plate, soft rubber pads, and adjustable waterproof bands.
Date: April 19, 1921
Creator: Downie, James H.
Partner: UNT Libraries Government Documents Department

Slime-Pulp Thickener.

Description: Patent for a machine used in the wet milling process. It allows proportionate distribution of liquids to aide during the thickening process.
Date: April 17, 1923
Creator: Allen, Charles
Partner: UNT Libraries Government Documents Department

Railroad-Tie.

Description: Patent for railroad ties and especially for a fie made from a log of wood.
Date: April 26, 1921
Creator: Bryant, Joseph D.
Partner: UNT Libraries Government Documents Department

Process of Forming Tubes

Description: Patent for the process of making tubes, especially tubes for producing, fitting, and/or refitting "eye-glasses, spectacles, &c." (lines 11-12).
Date: April 19, 1921
Creator: Rees, Herbert C.
Partner: UNT Libraries Government Documents Department

Fiber-Cleaning Device.

Description: Patent for a fiber cleaning device, which removes "the outer fleshy or non-fibrous tissues covering the fibers" (lines 19-21) for varieties of fleshy plants.
Date: April 6, 1920
Creator: Quijano, Ramon
Partner: UNT Libraries Government Documents Department

Bottle-Filling Device.

Description: Patent for filling bottles with "two liquids and introducing them into the bottle at the same time under pressure" (lines 17-18), specifically for "carbonated beverages" (lines 12-13).
Date: April 6, 1920
Creator: Dannelley, Dillon C.
Partner: UNT Libraries Government Documents Department

Automatic Sand Trap

Description: Patent for an automatic sand trap related to automatic devices for separating suspensions into two products and is concerned with the separation of sand from water for dam building and like purposes.
Date: April 12, 1921
Creator: Allen, Charles
Partner: UNT Libraries Government Documents Department

Book-Holding Device

Description: Patent for a book-holding device that will keep books open by holding back turned pages, with illustrations.
Date: April 20, 1920
Creator: Barry, David Redmond
Partner: UNT Libraries Government Documents Department

Concrete Building Mold.

Description: Patent for Concrete Building Mold that is composed to be able to be detachable and reversible.
Date: April 19, 1921
Creator: Rossiter, Jay A
Partner: UNT Libraries Government Documents Department

Digging-Machine.

Description: Patent for a digging machine specialized in breaking hard soil and creating ridges that attempt to reduce erosion.
Date: April 5, 1921
Creator: Holly, Charles
Partner: UNT Libraries Government Documents Department

Automatic Separator and Evaporator.

Description: Patent for an improved automatic separator and evaporator which controls the intake with an included air-lift or jet-ejector, including illustrations.
Date: April 5, 1921
Creator: Allen, Charles
Partner: UNT Libraries Government Documents Department

Broom.

Description: Patent for a broom designed to allow the straw to be easily changed as often as needed and to hold the straw firmly in place even when considerable pressure is used, including illustrations and instructions.
Date: April 11, 1922
Creator: Boyett, Oren K.
Partner: UNT Libraries Government Documents Department

Carbon-Removing Tool

Description: Patent for a new and improved carbon removing tool, which allows for the removal of carbon from the pistons of internal combustion engines. Includes illustrations.
Date: April 12, 1921
Creator: Slagle, Eugene H.
Partner: UNT Libraries Government Documents Department

Calipers.

Description: Patent for calipers that make it easier to read measurements, by having a strip of measuring tape at the ends that allows users to determine the distance between the arms easier. The measuring tape component is also retractable.
Date: April 4, 1922
Creator: Miller, William James
Partner: UNT Libraries Government Documents Department

Apparatus for Training Troop in the Pointing of Guns

Description: Patent for improvements to apparatus to train troops in pointing and aiming various firearms. An electric lamp shines light through a tube to point at the target, with a shutter that can operate simultaneously with the trigger or remain open.
Date: April 26, 1921
Creator: Place, Olney
Partner: UNT Libraries Government Documents Department

Automobile-Fender

Description: Patent for improvements in automobile-fenders. A simple and efficient cushioning fender for breaking.
Date: April 19, 1921
Creator: Dodson, George W.
Partner: UNT Libraries Government Documents Department

Dredge-Pump

Description: Patent for new and useful improvements to Dredge-Pumps. The pump is used to draw up sand and gravel from the bottom of a river.
Date: April 12, 1921
Creator: Stenberg, Anders Gustaf
Partner: UNT Libraries Government Documents Department

Animal-Trap

Description: Patent for an animal trap which is to be sprung by the animal when the bait is touched. It is constructed in such a manner that the animal will be instantly killed. The metal parts of the trap are to create a strong and durable trap and to be manufactured at a small expense.
Date: April 5, 1921
Creator: Brewington, Philip Jennings
Partner: UNT Libraries Government Documents Department
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