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. 16, 1976
Filed:
Mar. 07, 1975
Edward B Delany, Ridgefield, CT (US);
The Perkin-Elmer Corporation, Norwalk, CT (US);
Abstract
Thermocouples are disposed in the flame exhaust passage and exteriorly on the housing of each ionization detector to monitor the flame status thereof within an environment of widely varying temperature. A temperature differential signal is derived from the thermocouples of each ionization detector, with each temperature differential signal being compared to a common threshold level at which an indication of a flameout condition occurs. The indication of a flameout condition in each ionization detector is varied relative to the temperature differential thereof through a variable gain amplification stage. Switches are disposed for individually interrupting each temperature differential signal and flameout conditions occurring in any one or more of the ionization detectors are identifiable therewith.