The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Feb. 14, 2006
Filed:
Jan. 29, 2004
Richard H. Ferguson, Cecil Township, Washington County, PA (US);
Louis E. Colonna, Pittsburgh, PA (US);
Richard H. Ferguson, Cecil Township, Washington County, PA (US);
Louis E. Colonna, Pittsburgh, PA (US);
PPG Industries Ohio, Inc., Cleveland, OH (US);
Abstract
A method for monitoring and adjusting the level of free chlorine in an aqueous fluid is described. In the described method, first aqueous fluid () substantially free of free chlorine is introduced into a suitable mixing vessel () wherein it contacts a solid chemical material that is a source of free chlorine and chloride ion. Second aqueous fluid () containing free chlorine and chloride ion is removed from the mixing vessel and forwarded to a holding tank (). The chloride ion concentration of second aqueous fluid in the holding tank is measured by a chloride ion specific sensor in probe housing (), which sensor is in electrical contact with microprocessor (). Microprocessor (), in response to the chloride ion measurement, sends an output signal to valve control means, which if necessary increases or decreases the flow of first aqueous fluid into mixing vessel (). Second aqueous fluid in holding tank () is forwarded by pump means () to the point of application.