FIRE ALARM WITHOUT USING ELECTRIC POWER

A fire alarm without using electric power, which comprises a housing, an alarm assembly and a switch assembly; a driving spring in the alarm assembly is used for storing a driving energy. As soon as a nylon string in the alarm is burnt and broken, the driving spring will drive small hammers to hit a...

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Bibliographische Detailangaben
1. Verfasser:	LIN, HO C
Format:	Patent
Sprache:	eng ; fre
Schlagworte:	ACOUSTICS ACOUSTICS NOT OTHERWISE PROVIDED FOR ALARM SYSTEMS METHODS OR DEVICES FOR PROTECTING AGAINST, OR FOR DAMPING,NOISE OR OTHER ACOUSTIC WAVES IN GENERAL MUSICAL INSTRUMENTS ORDER TELEGRAPHS PHYSICS SIGNALLING SIGNALLING OR CALLING SYSTEMS SOUND-PRODUCING DEVICES
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Beschreibung
Zusammenfassung:	A fire alarm without using electric power, which comprises a housing, an alarm assembly and a switch assembly; a driving spring in the alarm assembly is used for storing a driving energy. As soon as a nylon string in the alarm is burnt and broken, the driving spring will drive small hammers to hit a bell cup to send out a warning signal to warn people that a fire is taking place.