Multi-sensor detector
August 25, 2020. 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 3826180 Combination smoke and heat detector alarm Sensor for a gas detector, in particular for smoke detection Smoke and heat detector alarm Smoke, fire and gas alarm with remote sensing, back-up emergency power, and system self monitoring Environmental abnormality detecting apparatus Apparatus for monitoring disturbances in environmental conditions Combined smoke and gas detection apparatus Composite detector Fire alarm system InventorsAssigneeApplicationNo. 648198 filed on 08/25/2000US Classes:340/506, Alarm system supervision340/508, Redundant (e.g., added circuit or loop)340/511, Threshold or window (e.g., of analog electrical level)340/517, Selection from a plurality of sensed conditions340/521, Plural diverse conditions340/522, Combined for response340/541Intrusion detectionExaminersPrimary: Pope, DarylAttorney, Agent or FirmInternational ClassG08B 029/00AbstractA multi-function detector has at least two different sensors coupled to a control circuit. In a normal operating mode the control circuit, which could include a programmed processor, processes outputs from both sensors to evaluate if a predetermined condition is present in the environment adjacent to the detector. In this mode the detector exhibits a predetermined sensitivity. In response to a failure of one of the sensors, the control circuit processes the output of the remaining operational sensor or sensors so that the detector will continue to evaluate the condition of the environment with substantially the same sensitivity. | |
