SIGNALLING SYSTEMS, e.g. PERSONAL CALLING SYSTEMS

**Definition:** This place covers:

Visual, audible, tactile signalling systems (or combinations thereof) and arrangements of signalling in devices if not provided for elsewhere.

Burglar, theft or intruder alarms. Identifying, scaring or incapacitating burglars, thieves or intruders.

Fire alarms; Alarms responsive to explosion.

Alarms responsive to unspecified undesired or abnormal operating condition if not provided for elsewhere.

Alarm systems in which the location of the alarm condition is signalled to a central station, either spontaneously or upon interrogation from the central station.

Alarm systems in which the alarm condition is signalled from a central station to a plurality of substations.

Checking or monitoring of signalling or alarm systems; Prevention or correction of operating errors, e.g. preventing unauthorised operation; Predictive alarm systems characterised by extrapolation or other computation using updated historic data.