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  2. Gentex (automotive supplier) - Wikipedia

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

    Gentex Corporation is an American electronics and technology company that develops, designs, and manufactures automatic-dimming rear-view mirrors, camera-based driver assistance systems, and other equipment for the automotive industry. [3] They produce dimmable aircraft windows for the commercial, business and general aviation markets.

  3. Wheelock (brand) - Wikipedia

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

    A Wheelock MT horn/strobe with a vertical (LSM) strobe. The Series MT (Multi-tone) was introduced in 1993. It features eight different tones including Continuous Horn, Code-3 Horn, March Time Horn, Code-3 Tone, Siren, Slow Whoop, Hi-Lo, and Bell. These could be set using DIP switches on the back of the horn. However, most of the tones did not ...

  4. 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. Three years after the initial release of the ...

  5. 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)

  6. Nathan Manufacturing - Wikipedia

    en.wikipedia.org/wiki/Nathan_Manufacturing

    The P-series horns have longer bells and a heavier manifold than the M-series. [3] The name of the horn is a P followed by the bells that face forward, followed by R if any are reversed, and then the numbers of the reversed bells; a P12345 is a true five-chime horn with all bells facing forward, while P135R24 has bells 2 and 4 reversed. [9]

  7. Fire alarm notification appliance - Wikipedia

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

    This pattern, which is also used for smoke alarms, is named the Temporal-Three alarm signal, often referred to as "T-3" or "Code-3" (ISO 8201 and ANSI/ASA S3.41 Temporal Pattern) and produces an interrupted four count (three half second pulses, followed by a one and one half second pause, repeated for a minimum of 180 seconds).