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Vignetting Attachment for Multiple-Exposure Cameras.

Patent for a multiple exposure camera attachment that allows multiple exposures to be made on a single plate or film, blending the exposures perfectly while avoiding harsh lines. The attachment is a telescopic tubular attachment with "a plurality of apertured light ray interrupting diaphragms" (lines 77-78).

Date: April 5, 1921

Creator: Moine, Selest E.

Partner: UNT Libraries Government Documents Department

Well-Drilling Tool.

Patent for a bit that can be attached to a rotary tool for drilling wells. It features a means for using water to dislodge any accumulated mud from the tool.

Date: April 5, 1921

Creator: Clore, Franklin H.

Partner: UNT Libraries Government Documents Department

Sample-Taking Device

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

Traction Device.

Patent for a traction device to be attached to the wheels of a motor vehicle to provide greater traction than the treads of the wheels. The traction device is meant to attach to and detach from the wheels as needed and to be adjustable to the dimensions of the wheels and their treads.

Date: July 5, 1921

Creator: Houston, Hugh Edward

Partner: UNT Libraries Government Documents Department

Railroad-Tie

Patent for a metallic tie and fastener designed to replace the wooden tie that was in general use. The purpose of this railroad tie is to secure the rail (preventing spreading) and and to prevent lateral moment (creeping) of the rail when the train is passing over.

Date: July 5, 1921

Creator: Jones, Charles James

Partner: UNT Libraries Government Documents Department

Safety-Razor

Patent for a razor held in place by a guard that protects the user against injury and the razor against dulling. The safety razor is easy to clean and is designed to be "cheaply and easily manufactured" (lines 21-22).

Date: July 5, 1921

Creator: Benton, Columbus A.

Partner: UNT Libraries Government Documents Department

Washing-Machine

Patent for a Washing-Machine which includes a base, a rotary rubbing drum with a foraminous concave rubbing bed of flexible material on the lower portion of the drum. Adjustable springs attached to the rubbing drum vary the drawing tension of the flexible rubbing bed.

Date: April 5, 1921

Creator: Seifert, John W.

Partner: UNT Libraries Government Documents Department

Watch Belt-Buckle.

Patent for a watch belt-buckle. This invention allows a novel belt buckle to retain a watch therein so that time can be observed. Additionally, this invention allows for the watch to be readily open or closed with respect to the buckle via a removable hinge.

Date: July 5, 1921

Creator: Perry, Charles, Jr. & Currie, Neil

Partner: UNT Libraries Government Documents Department

Digging-Machine.

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

Automobile-Spring.

Patent for improvements in automobile-springs, specifically a means of suspending the front and rear springs of an automobile and cushioning and absorbing shocks.

Date: July 5, 1921

Creator: Jones, George Chester & Jones, George C.

Partner: UNT Libraries Government Documents Department

Automatic Separator and Evaporator.

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

Animal-Trap

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

Aircraft

Patent for Improvements to aircraft steering. The invention allows the pilot to adjust the center of mass.

Date: April 5, 1921

Creator: Johnson, Louis V.

Partner: UNT Libraries Government Documents Department

Valve.

Patent for improvements to valves, specifically valves that have a sliding movement on the valve seat and to disk valves. The invention is to provide a valve of this type which is used in the interior of vats, tanks, or similar receptacles containing liquids.

Date: July 5, 1921

Creator: Spencer, Elmer H.

Partner: UNT Libraries Government Documents Department

Peanut-Digger.

Patent for improvements to peanut-diggers, specifically a curved frame attached to a plow beam.

Date: July 5, 1921

Creator: Stevens, Shed P.

Partner: UNT Libraries Government Documents Department

Rubber Razor.

Patent for a rubber razor. The rubber razor provides a flexible support for multiple blade and will allow the blades to contour to one's face.

Date: July 5, 1921

Creator: Billingsley, Rennie E.

Partner: UNT Libraries Government Documents Department

Fire-Extinguisher for Aeroplanes and the Like.

Patent for a fire extinguisher apparatus to be used in air crafts, boats, and other vehicles designed to be lightweight and to quickly extinguish fires.

Date: July 5, 1921

Creator: Clark, Walter C.

Partner: UNT Libraries Government Documents Department

Sanitary Bed-Spring Cover.

Patent for an invention that relates to the improvements in sanitary covers for attachment to the spring of a bed and the spring of the mattress. The sanitary cover provides a solution to repel vermin and noxious insects.

Date: July 5, 1921

Creator: Luedecke, Henry H.

Partner: UNT Libraries Government Documents Department

Means For Protecting Vaults.

Patent for protecting bank vaults by using metal shells (that are adapted to receive frangible gas containers containing asphyxiating or other disabling gas) as inner linings inside and next to the brick wall of the vault. The metal shells containing the gas containers will break upon contact when a person or persons are trying to breach the outer (brick wall) to gain access to the bank vault.

Date: April 5, 1921

Creator: Bumpass, Leonard E.

Partner: UNT Libraries Government Documents Department

Priming-Cup

Patent for an improved version of the priming cup "shown in Patent No. 1,329,464, granted February 3, 1920" (lines13-14). Includes illustrations.

Date: April 5, 1921

Creator: Martinek, Stanley A.

Partner: UNT Libraries Government Documents Department

Paving Apparatus.

Patent for "a device or apparatus for transmitting the vibrations of a vibrating machine...for the purpose of solidifying the paving by driving out air and water and surplus moisture" (lines 12-18), including illustration.

Date: July 5, 1921

Creator: Stubbs, Robert C.

Partner: UNT Libraries Government Documents Department

Mower.

Patent for a new mower designed for use with a single horse and provide a device where the sickle bar may be adjusted at various heights.

Date: July 5, 1921

Creator: Nelson, John Bryon

Partner: UNT Libraries Government Documents Department

Garment-Hanger.

Patent for a new garment hanger with supported arms that can be folded for storage, including illustrations.

Date: April 5, 1921

Creator: Morton, John R.

Partner: UNT Libraries Government Documents Department

Adjustable Luggage-carrier

Patent for a luggage carrier that attaches to vehicles to carry packages of various sizes. Includes illustrations.

Date: April 5, 1921

Creator: Green, John R.

Partner: UNT Libraries Government Documents Department

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