| THORN SECURITY LIMITED Patent applications |
| Patent application number | Title | Published |
|---|
| 20110181870 | PARTICULATE DETECTOR - A particulate detector ( | 07-28-2011 |
| 20100085200 | DETECTOR - A detector comprises a detector base ( | 04-08-2010 |
| 20100027583 | DETECTOR - A detector comprises a housing ( | 02-04-2010 |
| 20100026480 | FIRE GAS DETECTOR-CODING - A detector comprises a detector base and a sensor, first and second resistors connected in series, a DC voltage source (Vref) connected to the resistors, and means for monitoring the voltage at the midpoint of a potential divider constituted by the series-connected resistors. The first and second resistors are rated so that the midpoint voltage is indicative of the date of manufacture of the sensor. | 02-04-2010 |
| 20090127464 | Flame detector and a method - A flame detector is provided which comprises a housing ( | 05-21-2009 |
| 20090103097 | Window cleanliness detection system - A detector comprises a housing ( | 04-23-2009 |
| 20090033483 | Amplifier for Multi-Use of Single Environmental Sensor - A detection system in which a single sensor is employed to detect an extensive range of a parameter The output signal from the sensor is fed to the input of the electrical circuit, having a feedback loop, wherein the electrical circuit has a non-linear transfer characteristic. The non-linear transfer characteristic is achieved by changing the behaviour of the feedback loop of the electrical circuit at a predetermined level of input signal. The output of the circuit has a proportional relationship with the input until the input signal reaches this predetermined value, whereupon the behaviour of the feedback loop changes and the relationship of the output to the input of the circuit changes. While the input signal is above the predetermined value, the output of the circuit has a linear but disproportionate relationship with the input at a gradient different to that when the input signal is below the predetermined value. Further, the behaviour of the feedback loop changes to create a knee point in the response between the proportional and the linear parts of the characteristic. In this way, an overall non-linear transfer characteristic is produced by the electrical circuit, the transfer characteristic having with a well-defined knee point. The resolution of input signals below the knee point may be greater than the resolution of signals above the knee point. | 02-05-2009 |
