Fire alarms; Alarms responsive to explosion

Classification Context

Section:

PHYSICS

Class:

SIGNALLING

Subclass:

SIGNALLING SYSTEMS, e.g. PERSONAL CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS

Related Keywords

Child Classifications

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• G08B 17/02 Mechanical actuation of the alarm, e.g. by the breaking of a wire
• G08B 17/04 Hydraulic or pneumatic actuation of the alarm, e.g. by change of fluid pressure
• G08B 17/06 Electric actuation of the alarm, e.g. using a thermally-operated switch
• G08B 17/08 Actuation involving the use of explosive means
• G08B 17/1 Actuation by presence of smoke or gases
• G08B 17/12 Actuation by presence of radiation or particles, e.g. of infrared radiation or of ions