Flame detector self diagnostic system employing a modulated optical signal in composite with a flame detection signal
Patent 5495112 Issued on February 27, 1996. Estimated Expiration Date: 
December 19, 2014. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.
December 19, 2014. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.Patent References 3286761 3391984 3609382 Fault detection in a flame scanner Flame detector including detector testing apparatus Fire alarm system Combustion control device Flame detector Patent #: 5264708 InventorsAssigneeApplicationNo. 359072 filed on 12/19/1994US Classes:250/554, Flame light source340/578, By radiant energy431/79Photoelectric sensorExaminersPrimary: Westin, Edward P.Assistant: Nichols, Steven Attorney, Agent or FirmInternational ClassG01J 005/10AbstractA self diagnostic system for a flame detector. The system produces an optical determinant signal from an analog determinant signal that has a controllable amplitude and frequency. The system detects the optical determinant signal and the optical signal from the flame and processes both signals to thereby continuously monitor the flame while also continuously analyzing the operating status of the flame detector. | |
