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:
Mar. 02, 2021
Filed:
Nov. 22, 2019
Applicant:
Honeywell International Inc., Morris Plains, NJ (US);
Inventors:
Assignee:
Honeywell International Inc., Charlotte, NC (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
F23N 5/12 (2006.01); F23N 5/24 (2006.01);
U.S. Cl.
CPC ...
F23N 5/123 (2013.01); F23N 5/24 (2013.01); F23N 2227/00 (2020.01); F23N 2229/00 (2020.01); F23N 2231/00 (2020.01); F23N 2237/00 (2020.01); F23N 2900/00 (2013.01);
Abstract
A flame detection system is designed to detect leakage in flame sense circuits. The flame detection system includes a flame sensor, an amplifier, a detection circuit, and a microcontroller. Flame sense circuitry use operational amplifiers that needs negative voltage supply for its operation. Negative supply voltage properly measures negative input signals. Once a leakage current in the flame detection system is determined a shutdown signal is provided to shut down a flame sensor when the leakage current condition is determined.