Can anyone I.D. this siren, starts @ 0:20 in first video.

http://www.youtube.com/watch?v=NMhERKChiP4

Another short video:

http://www.youtube.com/watch?v=t3130iP72Io

Thought this was a novel approach for a clutchless vehicular coaster siren. The person behind CAM sirens designed a brush lifting mechanism to allow the rotor to coast after power was removed. Drawing and patent description Here is one that just sold on Ebay: http://img.photobucket.com/albums/v691/H...

Ok, so we are on the same page regarding nomenclature of the clutch parts, referring to the above photo of the clutch pieces, left to right, Clutch Disc, Ramp Disc, Clutch Collar. First, make sure the 2 .250 inch ball bearings are in the two recesses on the back side of the clutch collar. While hold...

Modernmidnight,
Is this what the clutch pieces look like, kinda hard to tell from your photo:

It sounds like you have a clutch problem. You can hear the motor wind up, it is trying but not engaging the rotor. I think the motor is ok. Federal used 3 different types of clutches, early Q's used the simple and reliable ball & ramp clutch, next was the screw type and the newer ones use a one ...

You can tell by the base, it is a model 28. The ID tag would have been mounted on the brush cover

Appears to be a Federal Model 28 or if that is chrome on the stator housing it could be a model 66. Did it come with a mounting base? You could tell what model from the type mounting base it has.

Just acquired a NOS Sireno model 40010. It came in the original Sireno box with a foot switch, brake switch, cable lugs, #4 cable, brake wire and instruction manual. The box was stamped March 11, 1976. It is a 12 port coaster siren with a screw type clutch but that 33 year old grease in the bearings...

Can't help with the screw type clutch, all of mine have the simple and reliable ball & ramp style but call or shoot an email to John Dorgan, www.sirenman.com , maybe he could give you some help.

Tim

Might try contacting the current owner Kevin O'Connell @ B & M Sirens for info.

http://siro-driftsirens.com/home.html