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:
Dec. 21, 1982
Filed:
Jul. 14, 1980
Applicant:
Inventor:
Herbert Goldsmith, Rockville, MD (US);
Assignee:
Chemed Corporation, Cincinnati, OH (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G01N / ;
U.S. Cl.
CPC ...
324449 ; 324444 ;
Abstract
A liquid conductivity cell utilizing the Kelvin four-electrode system, and a circuit to operate an alarm when the operating electrodes have reached a predetermined state of fouling. Thus, the invention cell self alarms when the electrodes have fouled. The electrodes each have two flow passageways, whereby the liquid takes a 'U' shaped path, and whereby the outer electrode closest to the liquid inlet and outlet fittings sinks all stray currents and the like to thereby permit interference free operation.