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:
Jan. 21, 2003
Filed:
May. 12, 2000
Applicant:
Inventors:
Peter P. Payne, Park Ridge, IL (US);
Stephan E. Schmidt, Woburn, MA (US);
Kristin Powers Goppel, Shrewsbury, MA (US);
Darrell J. King, Belmont, MA (US);
Stephen M. Tobin, Watertown, MA (US);
J. Thomas Fowler, Marblehead, MA (US);
Assignee:
Other;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G08B 1/712 ;
U.S. Cl.
CPC ...
G08B 1/712 ;
Abstract
In a flame ionization sensor type gas combustion control apparatus, the sensor is provided with a power supply which will increase the voltage as contamination build up occurs on the in-flame sensor electrode thereby keeping a constant sensor current and enabling the sensor to perform as intended even though insulative contaminant build up is present on the electrode.