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Well-Drilling Rig.

Description: Patent, including illustrations, for "an improved well drilling rig or apparatus" which provides "a simple, efficient, and practical machine of this kind including revoluble means having a device operatively connected to a walking beam (from which a drilling tool is suspended), so that upon every complete revolution of the revoluble means, the drilling tool or bit will be given two direct drops, each alternating with the lifting movement of the drill bit" (page 1, lines 11-21).
Date: February 3, 1920
Creator: Bradford, Robert M.
Item Type: Refine your search to only Patent
Partner: UNT Libraries Government Documents Department

Transmission-Gear

Description: Patent for improvements in motor vehicle transmissions in which all gears mesh at one time as opposed to being shifted and are "obtained by clutching different selected drive gears to the drive shaft of the transmission." (lines 18-20)
Date: August 3, 1920
Creator: Downie, James H.
Item Type: Refine your search to only Patent
Partner: UNT Libraries Government Documents Department

Tobacco-Pipe.

Description: Patent for a new tobacco pipe capable of trapping nicotine in a removable bowl to facilitate the cleaning process. The pipe also includes a trap for saliva that prevents any saliva from returning to the smoker's mouth regardless of pipe angle. The pipe is manufactured with minimal parts reducing need for repair.
Date: February 3, 1920
Creator: Gerhard, William Henry.
Item Type: Refine your search to only Patent
Partner: UNT Libraries Government Documents Department

Shock Absorber

Description: Patent for "Improvements in Shock Absorbers" (lines 6-7) including illustrations.
Date: February 3, 1920
Creator: Regenbrecht, Bernhard
Item Type: Refine your search to only Patent
Partner: UNT Libraries Government Documents Department

Thread-Cutter.

Description: Patent for "a simple and efficient thread or twine cutter which may be conveniently worn in the manner of a finger ring when in use, or may be applied or attached to the usual type of thimble for use." (lines 13-17) This invention can "be inexpensively stamped from sheet metal." (lines 21-22)
Date: February 3, 1920
Creator: Cade, King C.
Item Type: Refine your search to only Patent
Partner: UNT Libraries Government Documents Department

Saw Filer and Gummer

Description: Patent for adding an attachment to aid in "sharpening and gumming the teeth of circular saws particularly such saws as are used in cotton gins" (lines 13-15). The attachment works with a device for which the inventor previously received a patent. (Patent No. 1,180,270)
Date: February 3, 1920
Creator: McMicken, Thomas W.
Item Type: Refine your search to only Patent
Partner: UNT Libraries Government Documents Department

Folding Landing-Gear for Aircraft.

Description: Patent for improvement in folding landing-gears for an aircraft. Once the aircraft is at the sustention in the air, the wheels and attendant parts will fold up into the aircraft.
Date: February 3, 1920
Creator: McCarroll, Frank
Item Type: Refine your search to only Patent
Partner: UNT Libraries Government Documents Department

Automatic Safety Target.

Description: Patent for a target device for pistols and rifles which allows for the motion of the target being hit to move another target into view.
Date: August 3, 1920
Creator: Briggs, George F.
Item Type: Refine your search to only Patent
Partner: UNT Libraries Government Documents Department

Aeroplane.

Description: Patent for a new and useful airplane that provides the ability of the aircraft to take off from the ground at an abrupt angle. The aircraft has a supplemental propeller and jointed body to direct the machine upward in an abrupt ascent, making it especially useful in wooded areas or where obstructions prevent normal take-off.
Date: February 3, 1920
Creator: Cartwright, Andrew
Item Type: Refine your search to only Patent
Partner: UNT Libraries Government Documents Department

Anti-Agitating Device.

Description: Patent for anti-agitating device, including two figures describing said device, with illustrations. Author describes improvements for liquid dispensers on previous anti-agitating devices by altering the cylinder duties during its performance.
Date: February 3, 1920
Creator: Catron, John J.
Item Type: Refine your search to only Patent
Partner: UNT Libraries Government Documents Department
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