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A call bell is most often used to get the attention of someone, give an alarm or notice a person about something. They can be used at railroad crossings, fire alarms, school bells and doorbells.
fire alarms blink to alert you that they are on and working. -SmartyPants11
Fire-Lite Alarms was created in 1952.
Firestore.com and firstalertstore.com are both place where you can purchase fire alarms in bulk online. You can also purchase 3 packs of fire alarms from you local Home Depot.
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Some fire stations offer smoke alarms at little or no cost. Fire stations always have smoke alarms available, to make sure that there community is kept safe.
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Fire Dept.
False Friends and Fire Alarms - 1916 was released on: USA: 8 March 1916
The fire alarms emit a pitch high enough to know that when you hear it, you need to get out of whatever building you are in. The alarm is not a musical instrument, by the way.
NAPCO Security manufactures intrusion security keypads and alarms, video surveillance and cameras, fire alarms with fire and carbon monoxide detectors,
because the fire alarms blink to help you know that they are on, and the small lights create heat. -Riley the Smart(project answer only)