Unknown Siren UPDATE!

[Archon]

Siren is in process of getting repainted. Now has been primed

IT is now beleaved that this is a Decot prototype from around 1915 It was originaly a Gas Engine driven siren. And when Rock Springs needed a siren and didn't have a lot of money a Motor was added to this siren in the late 1920's and sold to the village. This is probley the only one ever built. Decot was the only one That was making true dual tone Stacked sirens at that time. Sterling was 8/16 which is not a true dual tone just a octive difference and they were seperate rotors 1 on each end. Federal was making single tone only at this time Denver was Single tone GE was single tone. ACA Was not around yet. Erik and ericksion were Single tone.

[Archon]

Looks better than it did I must say, and the tube hanging down next to the wires is a Grease tube for getting grease to the top bearing the lower bearing has a zerk fitting.

[Robert Gift]

Wonderful, Archon.

Your rotor appears that it will work equally well in either direction.

Is this 8/16? Not sure from what you wrote.

Gas powered means an engine spins the rotor via a crankshaft?
Would it have been directly coupled?
Would it have a centrifugal clutch?

Congratulations on such a wonderful and rare find.

Thank you,

[Archon]

Vanes are angled to go only counter clock wise it is 6/10 I was talking about the sterling M's which are 8/16.

[Robert Gift]

Oh, that's right. I should have remembered.

I missed noticing the slight vane angles pointing inwards countercockwise.

Can you photo straight down onto the rotor?

Our 2t22, with it's "T" (-- o --)vanes can operate in either direction.

If one direction, I'd expect the rotor vanes to have have an "L" _) shape.
Not |

"L" shape _) , as shown in this example, would only spin clockwise.
I'd expect "L" shape in one direction to be more efficient.

[SirenMadness]

Good job, Joe, on acquiring the only one of its specific kind!
The orientation of the vanes from the rotor wall allows them to "trap" air instead of letting it get pushed to the center of the rotor by more air being scooped up. The rotor would have looked allot nicer with the mouth-flange at the front.
I would assume a clutch to be there, but not a centrifugal one, so rather a manual or timed one.

[Daniel]

I've never seen another siren like it. What are the dimensions, e.g. rotor diameter, height, etc.? Is the motor 3,450 RPM?

[Archon]

It's now all been painted.

Here is some more info on it
Voltage: 220V 60hz
Type: Induction
Phase-3
Motor Frame: #224
Amp: 8
HP: 3
RPM: 3450
Motor Make: Westinghouse
Slipp type: Low Slip.
Rotor: dual tone Stacked 6/10
Rotor size: with 15inch
Rotor Hight 7 inches
Siren Maker Decot Prorotype

[Nelso90]

Thanks for the specs! It seems like the low tone would dominate the higher tone, as the bottom ports are larger. But, since the higher tone has a higher perceived loudness, I could be wrong. Any thoughts?

[Robert Gift]

I think you are right, 90.

Interesting they would have considered that and made the higher slightly smaller.

Could it be compensation for the motor case impeding some air entering the lower rotor?

Thank you for the details.
What are the low and high port heights?

What does "slip type" mean?

Would it be appropriate to paint the rotor black or some contrasting color
to show it spinning?