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Thickener (Sewage Type).

Description: Patent for sewage thickener that relies on sewage solids to sink to the bottom of the sewer and fall into the thickener, in which the thickener will press the solid sewage into a pulp. The pulp will be pressed at a predetermined density, and then the pressed pulp will float to the top of the sewage to be removed. The separation of liquid and solid sewage was predicted to prevent overflow.
Date: March 11, 1920
Creator: Allen, Charles
Partner: UNT Libraries Government Documents Department

Abilene Womans Club Building, Abilene, Texas: First Floor Plumbing Plan

Description: First floor plumbing plan for an Abilene Womans Club building in Abilene, Texas. It includes a layout of the first floor with details for plumbing, as well as section through typical water box, kitchen water heater piping diagram, clothes washer piping diagram, grade cleanout detail, plumbing riser diagrams, detail of storage tank supports, and a key for plumbing symbols.
Date: 1955
Creator: David S. Castle Co.
Partner: Tittle-Luther/Parkhill, Smith and Cooper, Inc.

Well-Casing Grapple

Description: Patent for a well-casing grapple, allowing a positive grip when lowering casing or pipe within a well, or withdrawing it therefrom, without the danger of slipping or accident.
Date: April 30, 1918
Creator: Artzt, Erich C.
Partner: UNT Libraries Government Documents Department

Pipe-Tongs

Description: Patent for an improvement on the existing design of pipe tongs, the improvement will allow for one individual to hold the tongs, adjust the size around the pipes, and screw or unscrew the pipe alone. Previous designs required two or three individuals.
Date: March 9, 1920
Creator: Hill, Richard Dennie
Partner: UNT Libraries Government Documents Department
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