Emergency warning device

Details Emergency warning device Emergency warning device

G - Physics

08

G

G08G 1/0965 (2006.01)

Patent

CA 2421068

A warning device D is fitted to an emergency vehicle and is arranged, when deactivated, to transmit a radio signal carrying an audio warning, this radio signal being transmitted repeatedly at successively different carrier frequencies, corresponding to the channels available in the local area. The VHF/FM radio receiver of any vehicle within range will tune to the signal of one of these carrier frequencies, as being identical or close to, but stronger than, the channel selected by the driver, so that the audio warning will be delivered to the driver.

Dispositif d'alarme D fixé sur un véhicule d'urgence et conçu, quand il est excité, pour émettre un signal radio portant une alarme sonore et émis de façon répétée à des fréquences de porteuses différentes successives correspondant aux voies disponibles sur le réseau local. Le récepteur radio VHF/FM de tout véhicule situé à portée s'accordera au signal d'une ces fréquences de porteuse, étant donnée qu'il est identique ou proche de la voie sélectionnée par le conducteur, mais cependant plus fort que cette voie, de façon à transmettre au conducteur l'alarme sonore.

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