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First Torndo sirensПериоды
First Siren was invented by Scottish philosopher John Robison.Improved version of the Siren was invented.James Douglass and George Slight worked on developing modern sirensFinal version of Douglass, and Slights work was installed in Lighthouse.Gustave Trouvé developed a siren.Decot and Sterling SirenPolice SirensFirst electronic sirenThe Rumbler siren was inventedChrysler Air-Raid Siren was built and constructedKlaxon Siren was developedKlaxon sirens in high demandBlues and Twos
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