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Can someone ID this?
Posted: Tue Aug 15, 2006 9:42 pm
by flyonby13
Posted: Tue Aug 15, 2006 10:29 pm
by 3t22
that is a Federal B coded siren. There's been a few ads for this siren posted on ebay.
Posted: Tue Aug 15, 2006 10:55 pm
by Trey
I believe this is one of the many ads:
Posted: Tue Aug 15, 2006 11:34 pm
by loudmouth
code system? do they mean like how long the siren sounds or dose it have a damper to make code?
Posted: Wed Aug 16, 2006 5:12 am
by Daniel
Where's the other half of the siren in the photo? There are three ways that I know of to stop a large siren's sound quickly for the purpose of coding. Dampers were used by Federal/Fedelcode and Klaxon, brakes were used by Sterling, and electrically reversing the motor was apparently used on some Allertors. I don't know how this particular siren did it, but I don't see where a damper could fit.
Posted: Thu Aug 17, 2006 11:17 pm
by Robert Gift
What is the purpose of coding?
I would think dampers would be the only way to do it.
Braking is difficult and reversing seems too slow, unless I am missing thentire point.
Thank you,
Posted: Thu Aug 17, 2006 11:34 pm
by Trey
robert gift wrote:What is the purpose of coding?
I would think dampers would be the only way to do it.
Braking is difficult and reversing seems too slow, unless I am missing thentire point.
Thank you,
Well I can see it for fire calls and stuff like here in the U.S. and I believe in Britain they use the "pulsed" code for a "Gray Warning" which is related to an air attack.
Posted: Fri Aug 18, 2006 1:42 am
by Jim_Ferer
robert gift wrote:What is the purpose of coding?
I would think dampers would be the only way to do it.
Braking is difficult and reversing seems too slow, unless I am missing thentire point.
Thank you,
In the days when alarms were transmitted by telegraph, fire departments used to transmit alarms by box numbers which corresponded to the number of the pull box on the street corner. In days of yore the first alarm would go to the corner where the box was and look around for the fire. Someone calling an alarm in may even be told to go to the box to guide the firemen.
The Fire Department of New York still uses box numbers, even though everything is automated now. Number One World Trade Center was Box 8-0-8-7, and Number Two was Box 9-9-9-8.
So a 'code' siren could sound out a box number. I don't see any place where there would be dampers on the Federal Code Siren in the ad.
Posted: Sun Aug 20, 2006 12:08 am
by flyonby13
thanks!!
Posted: Sun Aug 27, 2006 7:38 am
by Justin
I believe in Britain they use the "pulsed" code for a "Gray Warning" which is related to an air attack.
Grey was for fallout while Black was for direct attack?