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  2. Wheelock (brand) - Wikipedia

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

    The horn and strobe on the 7001 and 7002 models are wired in series, causing the horn to produce a distinctive "skipping" sound when the strobe flashes, similar to the "March Time" code. In late 1984, Wheelock redesigned the horn's grilles, making them vandal resistant; and shortly thereafter, pigtail leads were discontinued.

  3. Gentex (automotive supplier) - Wikipedia

    en.wikipedia.org/wiki/Gentex_(automotive_supplier)

    Gentex smoke detectors are used in hospitals, hotels, offices and other buildings worldwide. [9] In the early 1990s, Gentex introduced a smoke detector equipped with a strobe light which is designed to alert deaf and hard of hearing individuals. [10]

  4. Fire alarm notification appliance - Wikipedia

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

    Meanwhile, in 1976, Wheelock introduced the first horn/strobe notification appliances with its 7000 series. The majority of visual signals throughout the 1970s and 1980s were white or red incandescent lights. In the 1980s, most new installations began to include visual signals, and more strobes started to appear.

  5. System Sensor - Wikipedia

    en.wikipedia.org/wiki/System_Sensor

    The SpectrAlert series included horn strobes, strobes, remote horns, chimes, chime strobes, speakers, and speaker strobes. A main feature of these alarms was the ability to sync them using a System Sensor MDL sync module or the System Sensor sync protocol on a supported fire alarm control panel .

  6. Gentex - Wikipedia

    en.wikipedia.org/wiki/Gentex

    Gentex or Gentex Corporation may refer to: Gentex (standard), a protocol for telegraphs; Gentex (automotive manufacturer); Gentex (military contractor)

  7. Horn loudspeaker - Wikipedia

    en.wikipedia.org/wiki/Horn_loudspeaker

    A horn loudspeaker is a loudspeaker or loudspeaker element which uses an acoustic horn to increase the overall efficiency of the driving element(s). A common form (right) consists of a compression driver which produces sound waves with a small metal diaphragm vibrated by an electromagnet, attached to a horn, a flaring duct to conduct the sound waves to the open air.