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:
Jun. 26, 2001
Filed:
Jan. 06, 1998
Applicant:
Inventor:
Michael B. Schell, Santa Barbara, CA (US);
Assignee:
Edwards Systems Technology, Inc., Cheshire, CT (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G01N 3/3497 ; G08B 1/710 ;
U.S. Cl.
CPC ...
G01N 3/3497 ; G08B 1/710 ;
Abstract
A method for detecting improper venting of a combustion appliance within an interior space relies upon a carbon dioxide detector to determine whether a preselected criterion indicative of improper venting is exceeded. The preselected criterion can be a threshold concentration of carbon dioxide or a threshold level of rate of rise of carbon dioxide concentration that is exceeded at a specified time or over a specified interval of time. The method can be used to detect leaks in a residential furnace, at very low levels, during start up of the furnace by measuring the preselected criterion in a heated air duct.