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:
Nov. 04, 2014
Filed:
Feb. 15, 2006
Applicants:
Brent Chian, Plymouth, MN (US);
Timothy J. Nordberg, Plymouth, MN (US);
Inventors:
Brent Chian, Plymouth, MN (US);
Timothy J. Nordberg, Plymouth, MN (US);
Assignee:
Honeywell International Inc., Morristown, NJ (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
F23Q 3/00 (2006.01); F23N 5/24 (2006.01);
U.S. Cl.
CPC ...
F23N 5/242 (2013.01); F23N 2029/12 (2013.01); F23N 2029/06 (2013.01); F23N 2027/16 (2013.01);
Abstract
A diagnostic flame sensing circuit having less filtration so that an AC component of a flame sensing input is available for circuit diagnostics. Synchronized data sampling may used to detect the peak to peak magnitude of the residual AC component. A comparison of the magnitude of the component relative to a magnitude of the component during normal operation of the circuit may be used to check the condition of nearly all of the elements in the circuit.