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:
Feb. 12, 2002
Filed:
Apr. 15, 1999
Applicant:
Inventors:
Radivoje Popovic, Zug, CH;
Alexandre Pauchard, Bulle, CH;
Adrian Flanagan, Espoo, FI;
Robert Racz, Zug, CH;
Dragan Manic, Lausanne, CH;
Reinoud Felix Wolffenbuttel, Delft, NL;
Assignee:
Electrowatt Technology Innovation AG, Zug, CH;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G01J 5/00 ; G01J 5/02 ;
U.S. Cl.
CPC ...
G01J 5/00 ; G01J 5/02 ;
Abstract
A flame detector with a radiation sensor ( ) sensitive in the ultra-violet and/or visible range of the electro-magnetic spectrum, forms from the signal U at the output of the radiation sensor, a first signal U which is proportional to the direct voltage portion of the signal U , and a second signal U which is proportional to the alternating voltage portion of the signal U . The output signal UA of the flame detector is formed such that UA=U −U . Ignition sparks can thereby be effectively suppressed.