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Automatic lock.

Description: Patent for a gate lock that automatically locks.
Date: March 24, 1924
Creator: Parker, Robert N.
Partner: UNT Libraries Government Documents Department

Electric Battery

Description: Patent for an electric battery. This battery is designed to be more efficient and run for a longer time, without adding water.
Date: October 24, 1922
Creator: Holmes, Frank M.
Partner: UNT Libraries Government Documents Department

Rural Mail Box.

Description: Patent for improvements to rural mail boxes with divided interior compartments for incoming and outgoing mail. Mail box design includes flag to signal to recipients and postman of incoming and outgoing items. Additionally the design features interior and exterior doors that can be secured with a padlock to prevent mail from being stolen or tampered with, and to shield from various weather conditions.
Date: October 24, 1922
Creator: Dooley, Will Henry
Partner: UNT Libraries Government Documents Department

Spark Plug.

Description: Patent for a spark plug with the capacity to afford an intense spark, prevent leakage of current, and to preclude fouling of the plug in carbon.
Date: October 24, 1922
Creator: Bronson, Fred L.
Partner: UNT Libraries Government Documents Department

Dental-Broach Holder.

Description: Patent for a dental broach holder that can be easily cleaned, and that includes certain structural elements that keep a dental broach more secure during use. The broach fastens on the outside of the holder, the mechanism of which "[prevents] loss of the broach in the patient's mouth during operation" (lines 92-94).
Date: January 24, 1922
Creator: Gilbert, James M.
Partner: UNT Libraries Government Documents Department

Mold.

Description: Patent for a new, improved Mold "specially designed for the formation of the rings of packing such as is used in stuffing boxes for packing metallic rods" (lines 11-14), illustrations included.
Date: January 24, 1922
Creator: Miller, Ose Z.
Partner: UNT Libraries Government Documents Department

Mousetrap

Description: Patent for a mousetrap that is an improvement to the average mousetrap, but new in the sense that it can be made in various proportions or sizes for a variety of vermin.
Date: January 24, 1922
Creator: Spencer, Clarence E.
Partner: UNT Libraries Government Documents Department

Adjustable Friction-Grab for Fishing-Tools.

Description: Patent for friction grabs for fishing tools in well drilling operations that can be "easily adjusted for different sized holes or wells and which will be automatically adjusted and the grabs automatically closed on the object to be removed" (lines 14-17).
Date: May 24, 1921
Creator: Dickson, Lawrence E.
Partner: UNT Libraries Government Documents Department

Amusement Device.

Description: Patent for a Ferris wheel in which the passenger cars rotate horizontally in addition to rotating vertically with the direction of the main wheel.
Date: May 24, 1921
Creator: Lindamood, Roy S.
Partner: UNT Libraries Government Documents Department

Automatic Air and Gas Relief Valve for Oil-Distributing Systems.

Description: Patent for an air and gas relief valve for oil piping systems that improves upon the need for pumps to get rid of the accumulation of air and gas before pumping oil, with illustrations.
Date: May 24, 1921
Creator: Mobley, Henry Grady
Partner: UNT Libraries Government Documents Department

Condenser for Cotton-Presses.

Description: Patent for "Improvements in Condensers for Cotton-Presses," (lines 6-7) including illustrations. The invention is designed with cotton bale presses in mind, specifically the "condenser or bat forming device" (line 11).
Date: May 24, 1921
Creator: Taft, John A.
Partner: UNT Libraries Government Documents Department

Coupling.

Description: Patent for a coupling to be used by military vehicles, unique in its "simplicity, rapidity in attachment and detachment, strength and durability" (lines 19-21).
Date: May 24, 1921
Creator: Speece, Russell. W.
Partner: UNT Libraries Government Documents Department

Hydraulic Swivel.

Description: Patent for a hydraulic swivel which may be used for well drilling, has an inlet at the side, and is designed to be in few parts for reduced packaging.
Date: May 24, 1921
Creator: King, Walter E.
Partner: UNT Libraries Government Documents Department

Metal-Coating Composition.

Description: Patent for a metal coating composition to form a protective coating on metals and steel to prevent rust and corrosion.
Date: May 24, 1921
Creator: Ethridge, Thomas Jefferson
Partner: UNT Libraries Government Documents Department

Non-Skid Device

Description: Patent for a device that affixes to automobile wheels to provide tire traction and prevent skidding.
Date: May 24, 1921
Creator: Williams, Harry S.
Partner: UNT Libraries Government Documents Department

Sample-Taking Device.

Description: Patent for a sample-taking device to be used in well-drilling processes, which is unique in its simple construction, low manufacturing costs, and ease of use.
Date: May 24, 1921
Creator: Christian, Walton G.
Partner: UNT Libraries Government Documents Department

Tractor.

Description: Patent for a tractor in which the placement of the power source reduces dead weight and provides a low center of gravity, thereby increasing stability.
Date: May 24, 1921
Creator: Martin, John J.
Partner: UNT Libraries Government Documents Department

Car-Rail Hose-Bridge.

Description: Patent that provides a hose-bridge that is light in weight and simple in construction, that can be carried on the cars or stored at different points on the line convenient for use.
Date: January 24, 1921
Creator: Tyler, Charley P.
Partner: UNT Libraries Government Documents Department

Coating Apparatus and Mathod.

Description: Patent for a new apparatus into which long objects such as pipes can be placed, dipped into coating material, and spun so that objects are coated evenly.
Date: August 24, 1920
Creator: Watrous, Edward L.
Partner: UNT Libraries Government Documents Department

Hose Reel

Description: Patent for a hose reel that makes water easily available to the people in a building that has caught fire and is more easily maneuverable.
Date: August 24, 1920
Creator: Hamner, Edward M.
Partner: UNT Libraries Government Documents Department

Oil-Burner.

Description: Patent introduces the inventor's specific improvements to oil-burning stoves. The air and oil are fed into the chamber of the stove and thoroughly mixed before burning.
Date: August 24, 1920
Creator: Beckman, William
Partner: UNT Libraries Government Documents Department

Pusher Attachment for Tractors.

Description: Patent for an improved tractor attachment that is efficient to operate. The attachment can be fixated to connect both traditional tractors and grain headers.
Date: August 24, 1920
Creator: Records, Paul A.
Partner: UNT Libraries Government Documents Department

Railroad-Bed and Rail-Support.

Description: Patent for increased construction and durability of railway beds and their supports. The new design allows for rail supports to be removed and replaced without disrupting the road bed portion.
Date: August 24, 1920
Creator: Usher, George S.
Partner: UNT Libraries Government Documents Department

Shaft Bearing.

Description: Patent for Improvements in Shaft Bearing. This bearing shaft is used to withstand heavy thrusts.
Date: August 24, 1920
Creator: Ball, Authur T.
Partner: UNT Libraries Government Documents Department
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