Possible Denver Siren in Jeterville, VA

[Rheems1]

Over on one of the fire apparatus/fire station picture boards I am a member of, a picture was posted of the old firehouse in Jeterville, VA.... looks like a Denver siren up on a pole... I scrolled down two more pics and the photographer actually took a shot of the siren... what a guy!! Either way, is this a Denver siren??

[SirenMadness]

I think that it might be a Denver siren. It looks as if it has (24) ports. It looks as if it might be losely related to that siren that is on Eric's website.

Nice find!

[Archon]

If It's 24 ports I'll bet the Motor is 1800RPM

[AllSafe]

If it's a 24-port siren and it runs at 1800rpm, then 1800*24/60=720Hz

[Archon]

It would than sound like a STH or 5

[Robert Gift]

How interesting.
Jury-rigging at its best.

Motor looks hardly powerful enough to power such a large siren.
Looks more like a starter motor.

Is it an AC motor?

What note is 720 Hz?
880 is A

That station roof design looks modern.
But the window looks old.

Thank you,

[SirenMadness]

The rotor does not look that large, so the motor would have a pretty easy time. I'd think that it is an AC motor, as this is a station. I don't think that they'd have a starter motor on a siren.

[Robert Gift]

Yes, I'd expect it to be a.c., but have never seen such a cylindrically-shaped a.c. motor.
I thought the rotor stator pretty large.

I'd like to cover up every other stator port, making it 12 port, and then increase rpm to see if it would be louder.

[Conky 2000]

Robert, increasing RPM makes the pitch higher, not necessarily louder.

[AllSafe]

It's probably a gas pump motor, seeing that it is sealed. They have to use sealed induction motors to prevent an explosion risk due to arcing in the motor. I have seen several different styles, all being continuous duty.