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. 25, 1986
Filed:
Apr. 03, 1984
Richard C Ciammaichella, Chardon, OH (US);
Barry J Youmans, Rittman, OH (US);
The Babcock & Wilcox Company, New Orleans, LA (US);
Abstract
A flame detector comprises a light collecting lens or other device for collecting electromagnetic radiation from a flame's source, a filter for passing only a portion of the electromagnetic radiation from the lens which changes from between a flame on and a flame off condition, a solid state photocell for receiving the portion of electromagnetic radiation passed by the filter, and a circuit for producing a signal indicative of whether the flame is on or off in response to a signal generated by the photocell. The photocell is preferably sensitive to ultraviolet radiation to avoid confusion with infrared radiation that is produced by heat near the flame's source and which heat is not necessarily indicative of whether the flame is on or off. Such a photocell can preferably be made of Gallium Arsenide Phosphide semiconductor material.