Alarms responsive to two or more different undesired or abnormal conditions, e.g. burglary and fire, abnormal temperature and abnormal rate of flow

Introduced: September 1968

Last revised: January 2006

Classification Context

Section:: PHYSICS
Class:: SIGNALLING
Subclass:: SIGNALLING SYSTEMS, e.g. PERSONAL CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS

Scope Notes

Application references: Alarms, indicators or feed-disabling devices responsive to material breakage or exhaustion in mechanisms for manipulating page-width impression-transfer material, e.g. carbon paper Alarms, indicators or feed-disabling devices responsive to ink-ribbon breakage or exhaustion In rope- or cable-making machines, alarms or stop motions responsive to exhaustion or breakage of filamentary material fed from supply reels or bobbins

1 direct subcode

Child Classifications

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G08B 19/02 Alarm responsive to formation or anticipated formation of ice