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:
May. 02, 1978
Filed:
Jul. 21, 1975
Sian W Khoo, Etobicoke, CA;
Canadian Gas Research Institute, Don Mills, CA;
Abstract
A method and apparatus for providing a continuous indication of the interior condition of a water heater tank are shown herein. Iron interior surface of water heater tank is normally protected from corrosion by cathodic protection with the provision of a sacrificial anode element made of a highly anodic metal. A zinc probe is incorporated in the water heater tank such that the potential measured between the zinc probe and the iron interior surface indicates the condition of the sacrificial anode element thus providing an indication of the effectiveness of the cathodic protection. The zinc probe may be conveniently incorporated in the drain cork of the water heater tank.