| IPC 7 English version |
 G08 - G08B 17/12 |
| G08B01900-G08B03100 |
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| SECTION G – PHYSICS |
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| G 08 | SIGNALLING (indicating or display devices per se G09F; transmission of pictures H04N) |
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| G 08 B | SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS (signalling arrangements on vehicles B60Q, B62D 41/00; railway signalling systems or devices B61L; on cycles B62J 3/00, B62J 6/00; safes or strong-rooms with alarm devices E05G; signalling or alarm devices in mines E21F 17/18; sensitive measuring elements, see the appropriate subclasses of G01; traffic control systems G08G; visual indicating means G09; sound-producing devices G10; radio or near-field calling systems H04B 5/00, H04B 7/00; selecting arrangements H04Q 7/00, H04Q 9/00; loudspeakers, microphones, gramohpone pick-ups or like acoustic electromechanical transducers H04R) |
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19/ | 00 | Alarms responsive to two or more different undesired or abnormal conditions, e.g. burglary and fire, abnormal temperature and abnormal rate of flow |
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19/ | 02 | . | Alarm responsive to formation or anticipated formation of ice (indicating weather conditions G01W 1/00) |
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21/ | 00 | Alarms responsive to a single specified undesired or abnormal condition and not otherwise provided for |
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21/ | 02 | . | Alarms for ensuring the safety of persons [7] |
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21/ | 04 | . | . | responsive to non-activity, e.g. of elderly persons (G08B 21/06 takes precedence) [7] |
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21/ | 06 | . | . | indicating a condition of sleep, e.g. anti-dozing alarms (safety devices for propulsion-unit control of vehicles responsive to incapacity of driver B60K 28/06) [7] |
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21/ | 08 | . | . | responsive to the presence of persons in a body of water, e.g. a swimming pool; responsive to an abnormal condition of a body of water [7] |
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21/ | 10 | . | . | responsive to calamitous events, e.g. tornados, earthquakes (seismology G01V 1/00; indicating weather conditions G01W 1/00) [7] |
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21/ | 12 | . | . | responsive to undesired emission of substances, e.g. pollution alarms (alarms on pipe-lines F17D 3/01) [7] |
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21/ | 14 | . | . | . | Toxic gas alarms (G08B 21/16 takes precedence) [7] |
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21/ | 16 | . | . | . | Combustible gas alarms [7] |
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21/ | 18 | . | Status alarms (G08B 21/02 takes precedence) [7] |
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21/ | 20 | . | . | responsive to moisture [7] |
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21/ | 22 | . | . | responsive to presence or absence of persons [7] |
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21/ | 24 | . | . | Reminder alarms, e.g. anti-loss alarms (devices to prevent loss of bags or the like A45C 13/24) [7] |
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23/ | 00 | Alarms responsive to unspecified undesired or abnormal conditions |
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25/ | 00 | Alarm systems in which the location of the alarm condition is signalled to a central station, e.g. fire or police telegraphic systems |
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25/ | 01 | . | characterised by the transmission medium [5] |
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25/ | 04 | . | . | using a single signalling line, e.g. in a closed loop [5] |
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25/ | 06 | . | . | using power transmission lines (systems in general for transmission of information via power distribution lines H04B 3/54) [5] |
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25/ | 08 | . | . | using communication transmission lines (telephonic communication systems combined with alarm systems H04M 11/04) [5] |
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25/ | 10 | . | . | using wireless transmission systems [5] |
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25/ | 12 | . | Manually actuated calamity alarm transmitting arrangements [5] |
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25/ | 14 | . | Central alarm receiver or annunciator arrangements [5] |
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26/ | 00 | Alarm systems in which substations are interrogated in succession by a central station |
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27/ | 00 | Alarm systems in which the alarm condition is signalled from a central station to a plurality of substations |
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29/ | 00 | Checking or monitoring of signalling or alarm systems; Prevention or correction of operating errors, e.g. preventing unauthorised operation |
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29/ | 02 | . | Monitoring continuously signalling or alarm systems [5] |
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29/ | 04 | . | . | Monitoring of the detection circuits [5] |
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29/ | 06 | . | . | Monitoring of the line circuits, e.g. signalling of line faults (testing or locating faults in cables or lines in general G01R 31/02, G01R 31/08) [5] |
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29/ | 08 | . | . | . | Signalling of tampering with the line circuit [5] |
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29/ | 10 | . | . | Monitoring of the annunciator circuits [5] |
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29/ | 12 | . | Checking intermittently signalling or alarm systems [5] |
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29/ | 14 | . | . | checking the detection circuits [5] |
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29/ | 16 | . | Security signalling or alarm systems, e.g. redundant systems [5] |
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29/ | 18 | . | Prevention or correction of operating errors (G08B 29/02, G08B 29/12 take precedence) [5] |
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29/ | 20 | . | . | Calibration, including self-calibrating arrangements [5] |
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29/ | 22 | . | . | . | Provisions facilitating manual calibration, e.g. input or output provisions for testing; Holding of intermittent values to permit measurement [5] |
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29/ | 24 | . | . | . | Self-calibration, e.g. compensating for environmental drift or ageing of components [5] |
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29/ | 26 | . | . | . | . | by updating and storing reference thresholds [5] |
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29/ | 28 | . | . | . | . | by changing the gain of an amplifier [5] |
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31/ | 00 | Predictive alarm systems characterised by extrapolation or other computation using updated historic data [5] |
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| G08 - G08B 17/12 |  |
