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:
Apr. 05, 1977
Filed:
Sep. 16, 1975
Ernest O Severin, Houston, TX (US);
Aquasol, Inc., Houston, TX (US);
Abstract
Control apparatus for swimming pools to automatically regulate chlorinator and acidifier operation, thereby maintaining a desired chlorine residual and pH level. A first liquid sample from a swimming pool along with a chlorine reagent substance and a second liquid sample from the pool along with a pH reagent are sequentially introduced into a sample cell with a light source projecting light through the sample cell onto first and second photoelectric cells. The first photocell produces a signal having a magnitude that is directly proportional to the chlorine residual in the first liquid sample, and the second photocell produces a signal functionally related to the pH level of the second liquid sample. First and second comparators connected to the first and second photoelectric cells detect whether the chlorine residual or the pH level of the pool water is above or below a prescribed value and supply a two-state output signal which represents the existence or non-existence of the prescribed level of chlorine residual or pH in the liquid samples. Flip-flops store the detection results and supply signals to driver circuits which initiate or inhibit chlorinator and acidifier operation. A timing circuit periodically enables system operation with a state controller sequencing system operation.