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  2. Civil defense siren - Wikipedia

    en.wikipedia.org/wiki/Civil_defense_siren

    Hungary. [edit] The first ever civil defense air raid siren system was installed in 1938-1939 by the Hungarian Goverment to warn the public of air attacks. Electric-motor sirens were placed in big cities, the high-range sirens were placed in downtown, while the suburban areas had small-range electric-motor sirens.

  3. Siren (alarm) - Wikipedia

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

    An 1860s-era siren. [ 2 ] A siren is a loud noise-making device. Civil defense sirens are mounted in fixed locations and used to warn of natural disasters or attacks. Sirens are used on emergency service vehicles such as ambulances, police cars, and fire engines. There are two general types: mechanical and electronic.

  4. Federal Signal Corporation - Wikipedia

    en.wikipedia.org/wiki/Federal_Signal_Corporation

    Federal Signal Safety and Security Systems Group manufactures campus alerting systems, emergency vehicle lighting, emergency sirens, alarm systems, outdoor warning sirens, and public address systems. Currently, the company has 14 manufacturing facilities in 5 different countries. [1]

  5. Hear an outdoor emergency siren in the county? Here's ... - AOL

    www.aol.com/hear-outdoor-emergency-siren-county...

    The outdoor weather siren system in St. Joseph County is in need of new electronics and an upgrade, and officials hope the work is done by early fall.

  6. Federal Signal 3T22 - Wikipedia

    en.wikipedia.org/wiki/Federal_Signal_3T22

    A Federal Signal 2T22 siren. The Federal Signal 3T22 / 2T22 was a dual tone, mechanical outdoor warning siren made by Federal Signal Corporation (formerly Federal Sign and Signal Corporation) from 1952 through the early 1990s. It has a very recognizable design, having a ten-port rotor (chopper) on the bottom with ten cones (horns) and a 12-port ...

  7. American Signal Corporation - Wikipedia

    en.wikipedia.org/wiki/American_Signal_Corporation

    American Signal Corporation (ASC) is an outdoor warning siren and mass notification company in the United States. ASC was founded in 1873 as Biersach and Niedermeyer (B&N). After performing poorly, the company reformed as Alerting Communicators of America (ACA) in 1968, and expanded the line of warning systems they produced. In 1992, ACA went ...

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