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  2. Alarm device - Wikipedia

    en.wikipedia.org/wiki/Alarm_device

    safety alarms, which go off if a dangerous condition occurs. Common public safety alarms include: civil defense siren, also known as tornado sirens or air raid sirens; fire alarm systems. fire alarm notification appliance "Multiple-alarm fire", a locally specific measure of the severity of a fire and the fire-department reaction required. smoke ...

  3. Fire alarm notification appliance - Wikipedia

    en.wikipedia.org/wiki/Fire_alarm_notification...

    European Siren for fire detection system. A fire alarm notification appliance is an active fire protection component of a fire alarm system.A notification appliance may use audible, visible, or other stimuli to alert the occupants of a fire or other emergency condition requiring action.

  4. Electric bell - Wikipedia

    en.wikipedia.org/wiki/Electric_bell

    Electromechanical bells have been widely used at railroad crossings, in telephones, fire and burglar alarms, as school bells, doorbells, and alarms in industrial areas, since the late 1800s, but they are now being widely replaced with electronic sounders.

  5. Fire alarm system - Wikipedia

    en.wikipedia.org/wiki/Fire_alarm_system

    A fire alarm system is a building system designed to detect, alert occupants, ... sirens, chimes, bells, loudspeakers, or a combination of these devices. ...

  6. Faraday (company) - Wikipedia

    en.wikipedia.org/wiki/Faraday_(company)

    They also rebranded coded fire alarm stations from Holtzer-Cabot. From the 1930s to the 1960s, Faraday was known as " Sperti -Faraday", and the company moved to Adrian, Michigan . [ 1 ] From the late 1960s up until present, many companies rebranded Faraday's popular line of notification appliances, including Simplex , Standard Electric Time ...

  7. Siren (alarm) - Wikipedia

    en.wikipedia.org/wiki/Siren_(alarm)

    Two early fire siren manufacturers were William A. Box Iron Works, who made the "Denver" sirens as early as 1905, and the Inter-State Machine Company (later the Sterling Siren Fire Alarm Company) who made the ubiquitous Model "M" electric siren, which was the first dual tone siren.

  8. Notre-Dame’s bells ring out for the first time since the ...

    www.aol.com/news/notre-dame-bells-ring-first...

    The eight restored bells of the cathedral’s northern belfry, which was partially destroyed in the fire, rang together Friday morning as part of a technical test before Notre-Dame’s official ...

  9. Wheelock (brand) - Wikipedia

    en.wikipedia.org/wiki/Wheelock_(brand)

    Cooper Wheelock also produces several bells as well as speakers, synchronization modules, booster power supplies, [2] chimes and voice evacuation products. Cooper Wheelock does not manufacture fire alarm control panels (except for the Safepath Voice Evacuation System), [ 3 ] smoke detectors , or heat detectors .

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