The Siren Board

I remember seeing a Model 5 at one of Santa Fe's fire stations on Rte. 66.

I'd guess it's a Q with an AC motor.

CO2 expands much faster than compressed air. That's why collectors often use it to blow steam whistles without a boiler.

Denver sirens seem to do it too.

I had one but I sold it. I didn't know it was meant for CO2.

https://www.youtube.com/watch?v=v-GSpql71hA

My elementary school in Ashland, Oregon, had three of these in the main hallway and one in the gym, but none outside. For drills, they would run the sirens for a few seconds and then sound a continuous bell, but I believe pulling a station would give a continuous siren.

I don't know where this is, but this is exactly what fire alarms sounded like in older Oregon school buildings.

https://www.youtube.com/watch?v=GIYqfYHSgfk

Judging by the photo in the ad, it looks more like 16/18

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