Douglas Veronica Walker

US Patent:

50452142, Sep 3, 1991

Filed:

May 31, 1989

Appl. No.:

7/359872

Inventors:

Douglas T. Walker - Elk Grove Village IL

Assignee:

Union Oil Company of California - Los Angeles CA

International Classification:

C02F 120

US Classification:

210717

Abstract:

Methods are provided for removing contaminants from an aqueous solution to yield a less contaminated aqueous effluent. In one embodiment of the invention, the method comprises coprecipitating non-volatile contaminants (i. e. , heavy metals, light metals, cyanide, phenolics, oil and grease, TSS, BOD, COD, and/or TOC) with a carrier precipitate which is formed in situ within the aqueous solution. In another embodiment of the invention, the method comprises partitioning volatile organic contaminants between a liquid phase and a gas phase. In yet a further embodiment, the above versions of the invention are simultaneously performed in the same reaction vessel.

US Patent:

49103679, Mar 20, 1990

Filed:

Mar 7, 1988

Appl. No.:

7/164527

Inventors:

Donald J. Akers - Chicago IL
Douglas J. Walker - Orland Park IL

Assignee:

Joslyn Corporation - Chicago IL

International Classification:

H01H 3388

US Classification:

200148A

Abstract:

An SF. sub. 6 puffer interrupter switch includes one or more viewing windows located on the housing. The viewing windows are strategically located on a sidewall of the housing to allow all of the puffer interrupter assemblies within the housing to be viewed from one viewing window. The puffer interrupter assemblies that house the interrupting contacts are provided with clear puffer tubes to allow the operator to verify the position of the interrupting contacts within the puffer tubes from the viewing window located on the housing. The SF. sub. 6 interrupter switch housing is pressurized. By assembling the viewing window assemblies from the inside of the housing, the positive pressure within the housing assists in sealing the viewing window assemblies to minimize the leakage of the SF. sub. 6 gas. Additional viewing windows may be used to allow light inside the housing.