| Class / Patent application number | Description | Number of patent applications / Date published |
|---|
| 340629000 | Ionization | 9 |
| 20080252473 | Smoke Detector - A smoke detector replaces the americium source of alpha particles with a field emission device using carbon nanotubes as the field emitters, or some other field emitter, in order to provide an ionization of die air potentially caring smoke particles through the smoke detector. | 10-16-2008 |
| 20090066525 | Smoke meter and locator - A device which provides a smoke meter and locator. | 03-12-2009 |
| 20100085199 | Dynamic Alarm Sensitivity Adjustment and Auto-Calibrating Smoke Detection - A microprocessor controlled hazardous condition detection system and method containing a sensor package, the sensor package containing sensors exposed to the ambient environment. The system also includes an alarm means coupled to the sensor package through a microprocessor having volatile and non-volatile memory. In a preferred embodiment the hazardous condition detector is ionization-technology-based and optimized to readily detect smoldering as well as traditional flash fires. The microprocessor stores the periodic readings in the volatile memory, and calculates an average of a plurality of the periodic readings. The microprocessor analyzes the character/type of smoke by tracking the rate of rise of the sensor signal over a predetermined time period. Based on the progression of the rate of rise calculated from periodic sampling of the ambient environment the microprocessor evaluates the rate of ionized particle change and adjusts the alarm thresholding to readily detect both smoldering and flash fires. | 04-08-2010 |
| 20100238036 | Use of optical reflectance proximity detector for nuisance mitigation in smoke alarms - A smoke alarm comprises smoke detection circuitry for detecting smoke and generating a detection signal responsive thereto. Proximity detection circuitry generates a proximity detection signal responsive to detection of an object within in a selected distance of the smoke alarm. Alarm generation circuitry generates an audible alarm responsive to the detection signal. The audible alarm may be deactivated for a predetermined period of time responsive to at least one proximity detection signal. | 09-23-2010 |
| 20130027211 | SMOKE DETECTOR - The smoke detector comprises a housing provided with one or more openings for the passage of smoke particles into an interior of the housing. A first electrode and a second electrode are disposed in the interior of the housing and generate an electric field by application of an electrical potential therebetween. A detection chamber is defined between the first electrode and the second electrode, the detection chamber comprising an ionisation zone for the generation of charged particles by ionisation of air in the vicinity of the second electrode and a drift zone for the movement of charged particles towards the first electrode. A measurement device measures an electrical parameter representative of the electrical current generated between the first electrode and the second electrode by the charged particles. The electrical potential between the first electrode and the second electrode is maintained at a first electrical potential level which is less than and in the vicinity of an electrical potential threshold level at which at corona phenomenon is generated such that in the absence of smoke no corona phenomenon is generated in the vicinity of the second electrode and in the presence of smoke a corona phenomenon is generated in the vicinity of the second electrode. | 01-31-2013 |
| 20140097958 | INTEGRATED CIRCUIT TO OPERATE IN AN AREA OF IONIZING RADIATION, AND HAVING AN OUTPUT FOR A RADIATION DOSE-DEPENDENT WAY DAMAGE INFORMATION, AND ALARM INDICATORS AND CORRESPONDING METHOD - An integrated circuit, in particular a microcontroller, for operation in an area with ionizing radiation, has at least one part of a temperature control circuit. The temperature control circuit performs a regulated increase in the circuit temperature to a predefined, essentially constant operating temperature, by increasing the electrical power consumption of the circuit by an adjustable additional electrical power. The circuit has an output facility for information about damage to the integrated circuit caused by the ionizing radiation impacting thereon, it being possible to determine the information about damage from a radiation-dose-dependent decrease in the adjustable additional electrical power. | 04-10-2014 |
| 20150084776 | INTEGRATED CIRCUITS WITH RADIOACTIVE SOURCE MATERIAL AND RADIATION DETECTION - Radioactive integrated circuit (IC) devices with radioactive material embedded in the substrate of the IC itself, and including logic for “fingerprinting” (that is, determining characteristics that identify the source of the radioactive source material). Radioactive IC devices with embedded detector hardware that determine aspects of radioactivity such as total dose and/or ambient radiation. Radioactive IC devices that can determine an elapsed time based on radioactive decay rates. Radioactive smoke detector using man-made, relatively short half-life radioactive source material. | 03-26-2015 |
| 20160098909 | Differential Current Measurements To Determine Ion Current In The Presence Of Leakage Current - An ion chamber provides a current representative of its characteristics as affected by external conditions, e.g., clean air or smoke. A direct current (DC) voltage is applied to the ion chamber at a first polarity and the resulting current through the ion chamber and parasitic leakage current is measured at the first polarity, then the DC voltage is applied to the ion chamber at a second polarity opposite the first polarity, and the resulting current through the ion chamber and parasitic leakage current is measured at the second polarity. Since substantially no current flows through the ion chamber at the second polarity, the common mode parasitic leakage current contribution may be removed from the total current measurement by subtracting the current measured at the second polarity from the current measured at the first polarity, resulting in just the current through the ion chamber. | 04-07-2016 |
| 20160133108 | INTELLIGENT SMOKE SENSOR WITH AUDIO-VIDEO VERIFICATION - A method and system architecture for automation and alarm systems is provided. An intelligent fire detection sensor is provided that provides input data to a gateway device for processing and facilitates two-way communication with users and a third-party monitoring service. The system architecture is hierarchically organized, allowing devices to process system data differently at different levels of the hierarchy. Processing of at least some of the sensor data is overseen by the gateway device, which may determine, based on the processing, to activate one or more secondary sensors at the fire detector (such as an optical camera). The gateway device and fire detection sensor may interact cooperatively to process voice commands and/or gesture data, and to recognize false alarms. | 05-12-2016 |
