Civil defense siren - Wikipedia
A civil defense siren is a siren used to provide an emergency population warning to the general population of approaching danger. Initially designed to warn city dwellers of air raids (air-raid sirens) during World War II, they were later used to warn of nuclear attack and natural disasters, such as tornadoes (tornado sirens).
Federal Signal Thunderbolt - Civil Defense Sirens Wiki
The Thunderbolt was a long-running series of supercharged rotating sirens manufactured by Federal Signal, and over its nearly 40-year production run it gained a reputation as one of the most popular civil defense sirens ever produced, sporting nearly …
Federal Signal 3T22 - Wikipedia
A Federal Signal 2T22 siren. The Federal Signal 3T22 / 2T22 is a dual tone, mechanical outdoor warning siren once 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 …
Thunderbolt (siren) - Wikipedia
The Thunderbolt is a mechanical outdoor warning siren that was manufactured by Federal Signal Corporation from 1951 until its production ended in 1991. [1] It is a unidirectional, rotating siren with a large square-shaped horn, and can come in various colors, usually yellow, by request.
Federal Sirens - Civil Defense Museum
The Federal Thunderbolt siren was developed in the early 1950s specifically for civil defense warning use. The Thunderbolt was a unique design because it used a high power air pump (roots blower not a compressor) to force a high volume of low pressure air through the siren rotor (chopper) which kept the sound output of the siren at full volume ...
Electronic and Giant Voice Sirens Systems | Federal Signal
Electronic and Giant Voice Sirens Systems. Federal Signal's mass notification giant voice sirens and speakers are designed for community or industrial facility emergency situations that require mass notification. Alert people, employees or surrounding communities with high-powered emergency warning speakers built for a range of applications.
2001-130 Directional Rotating Siren | Federal Signal
The Federal Signal 2001-130 and Equinox sirens is a high power, warning, unidirectional outdoor rotating siren. The high-decibel output provides maximum coverage with minimum installation cost. Radio/cellular/satellite or wireless IP activation can further minimize installation costs by eliminating the need for leased dedicated control lines.
Warning Sirens - Civil Defense Museum
Sirens were long used before the cold war to signal warnings of air attack and many other uses but during the cold war virtually every city had a siren warning system to warn citizens of nuclear attack.
Federal Signal XT22 | Civil Defense Sirens Wiki | Fandom
The XT22 (2 or 3 Tone, 22 horns/ports) sirens are dual rotor omnidirectional sirens that were produced by Federal Signal over a span of nearly 40 years, and included two sirens, the 2T22 and 3T22. These are some of the most well-known sirens, with a distinctive sound, and are still commonly found today.
SD-10 - Air Raid Sirens Wiki
2024年10月24日 · The SD-10 (Special Dual-Tone, 10-Horsepower) is an omnidirectional, electromechanical civil defense siren that was produced by Federal Signal. It was introduced in 1954 as a special-purpose dual-tone civil defense siren, as the Office of Civil Defense mandated that all sirens used for civil defense must be dual-tone.
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