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. 17, 1976
Filed:
Sep. 09, 1974
Jaykishan C Patel, Clinton, IA (US);
General Electric Company, Fort Wayne, IN (US);
Abstract
A low voltage thermostatically energizable control system for a fuel burner having a fuel valve and operable from a direct current. The control system includes means for actuating the fuel valve to enable flow of a combustible fuel from the burner and means for spark igniting the fuel emitted from the burner. Means for detecting a flame is disposed near the burner, and the impedance between the detecting means and a point of reference potential is greater when no flame is present at the burner and is lower when a flame is present at the burner. A semiconductor device is coupled to the detecting means for conducting current only when the impedance between the detecting means and the point of reference potential is lower thereby to indicate the presence of a flame, and means is responsive to the current conducted by the semiconductor device for disabling the spark igniting means.