Identifying, scaring, or incapacitating burglars, thieves, or intruders, e.g. by explosives (burglar traps, or the like, on safes
E 05 G 5/02)
15
/
02
•
with smoke, gas, or coloured or odorous powder or liquid
17
/
00
Fire alarms; Alarms responsive to explosion (temperature-responsive elements G 01 K)
17
/
02
•
Mechanical actuation of the alarm, e.g. by the breaking of a wire
17
/
04
•
Hydraulic or pneumatic actuation of the alarm, e.g. by change of fluid pressure
17
/
06
•
Electric actuation of the alarm, e.g. using a thermally-operated switch (thermally-operated electric switches per seH 01 H 37/00)
17
/
08
•
Actuation involving the use of explosive means
17
/
10
•
Actuation by presence of smoke or gases
17
/
103
•
•
using a light emitting and receiving device [5]
17
/
107
•
•
•
for detecting light-scattering due to smoke [5]
17
/
11
•
•
using an ionisation chamber for detecting smoke or gas (vacuum gauges making use of ionisation effects G 01 L 21/30; gas analysis by investigating the ionisation G 01 N 27/62
) [5]
17
/
113
•
•
•
Constructional details (discharge tubes for measuring pressure of introduced gas, or for detecting presence of gas, in general H 01 J 41/02) [5]
17
/
117
•
•
by using a detection device for specific gases, e.g. combustion products, produced by the fire (G 08 B 17/103, G 08 B 17/11 take precedence; investigating or analysing gases in general G 01 N, e.g. by using electric means
G 01 N 27/00) [5]
17
/
12
•
Actuation by presence of radiation or particles, e.g. of infra-red radiation, of ions
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
19
/
02
•
Alarm responsive to formation or anticipated formation of ice (indicating weather conditions G 01 W 1/00)
21
/
00
Alarms responsive to a single specified undesired or abnormal operating condition and not elsewhere provided for
23
/
00
Alarms responsive to unspecified undesired or abnormal conditions
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
25
/
01
•
characterised by the transmission medium [5]
25
/
04
•
•
using a single signalling line, e.g. in a closed loop [5]
25
/
06
•
•
using power transmission lines (systems in general for transmission of information via power distribution lines H 04 B 3/54) [5]
25
/
08
•
•
using communication transmission lines (telephonic communication systems combined with alarm systems
H 04 M 11/04) [5]
Central alarm receiver or annunciator arrangements [5]
26
/
00
Alarm systems in which substations are interrogated in succession by a central station
27
/
00
Alarm systems in which the alarm condition is signalled from a central station to a plurality of substations
29
/
00
Checking or monitoring of signalling or alarm systems; Prevention or correction of operating errors, e.g. preventing unauthorised operation
29
/
02
•
Monitoring continuously signalling or alarm systems [5]
29
/
04
•
•
Monitoring of the detection circuits [5]
29
/
06
•
•
Monitoring of the line circuits, e.g. signalling of line faults (testing or locating faults in cables or lines in general G 01 R 31/02, G 01 R 31/08) [5]
29
/
08
•
•
•
Signalling of tampering with the line circuit [5]
29
/
10
•
•
Monitoring of the annunciator circuits [5]
29
/
12
•
Checking intermittently signalling or alarm systems [5]
29
/
14
•
•
checking the detection circuits [5]
29
/
16
•
Security signalling or alarm systems, e.g. redundant systems [5]
