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2. Federal Signal Corporation - Wikipedia

   en.wikipedia.org/wiki/Federal_Signal_Corporation

   https://www.federalsignal.com. Federal Signal Corporation is an American manufacturer headquartered in Downers Grove, Illinois. Federal Signal manufactures street sweeper vehicles, public address systems, emergency vehicle equipment, and emergency vehicle lighting . The company operates two groups: Federal Signal Environmental Solutions and ...

3. Emergency vehicle lighting - Wikipedia

   en.wikipedia.org/wiki/Emergency_vehicle_lighting

   Emergency vehicle lighting, also known as simply emergency lighting or emergency lights, is a type of vehicle lighting used to visually announce a vehicle's presence to other road users. A sub-type of emergency vehicle equipment, emergency vehicle lighting is generally used by emergency vehicles and other authorized vehicles in a variety of ...

4. Federal Signal Modulator - Wikipedia

   en.wikipedia.org/wiki/Federal_Signal_Modulator

   Federal Signal Modulator. A Federal Signal Modulator siren in Bay Head, New Jersey. Federal Signal Modulators (also known as Modulator Speaker Arrays) are electronic warning devices produced by Federal Signal Corporation that are used to alert the public about tornadoes, severe weather, earthquakes, fires, lahars, tsunamis, or any other disaster.

5. Mars Light - Wikipedia

   en.wikipedia.org/wiki/Mars_Light

   Mars Lights are signal-safety lights used in the United States and built by Mars Signal Light Company for railroad locomotives and firefighting apparatus. Mars Lights used a variety of means to cause the light to oscillate vertically, horizontally, or both, to catch the attention of motorists and pedestrians. Mars lights were developed by Jerry ...

6. A radio signal hack is what made those Dallas warning sirens ...

   techcrunch.com/2017/04/12/dallas-emergency...

   The city’s outdoor warning system, first installed in 2007, is powered by 156 sirens made by a company called Federal Signal Corp. City officials declined to provide details on how the emergency ...

7. Federal Signal 3T22 - Wikipedia

   en.wikipedia.org/wiki/Federal_Signal_3T22

   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 one on top with twelve cones.