How Does A Siren Work?

[Doc Tinker]

What's inside of a siren? Some screaming wench?



Has anyone ever taken one apart to see why she screams so much?



Doc

 

[illflem]

Doc, a siren is a horn that's been castrated

 

[Doc Tinker]

Castrated by a redhead, I presume.



Doc

 

[Steve Campbell]

Doc when I think of siren...

I think of WWII Air raid sirens. They were two "plates" (similar to the stator in an auto transmission) that were mounted very close together. One was fixed and the other one moved as the shaft was turned. All of those fins passing in such close proximity created the sound. More speed of the parts made it louder and higher pitch. I hope that helped.

 

[Fireman Dave]

Here's the answer:



A firefighter is working on the engine outside the station when he notices a little girl next door in a little red wagon with little ladders hung off the side and a garden hose tightly coiled in the middle. The girl is wearing a firefighter's helmet and has the wagon tied to a dog and cat. The firefighter walks over to take a closer look. "That sure is a nice fire truck," the firefighter says with admiration. "Thanks," the girl says. The firefighter looks a little closer and notices the girl has tied the wagon to the dog's collar and to the cat's testicles. "Little Partner," the firefighter says, "I don't want to tell you how to run your firetruck, but if you were to tie that rope around the cat's collar, I think you could go faster. " The little girl replied, "You're probably right, but then I wouldn't have a siren. "





:-laf :-laf

 

[Bob Wagner]

does anyone else remember

the siren that could be added onto a bicycle in the 60's



My brother had one and they were later banned in Ohio



This thing was mounted onto the front fork and rotated on the front wheel (going by memory) since I am classified 'old fart'



Not affilaited wth any siren company :{



#ad

 

[Will24]

I can dig the electronic one I have out and take a pic of the inside for you if ya want. Mechanical sirens are a lot easier to explain, take a starter motor (in something like a federal signal Q2B) and attach a whistle type rotor to it, now spin at 1000 rpm and there you go!

 

[dalton4]

Wagner, I remember it well and was recalling the bike version prior to reading your reply. A small chain hanging from the handlebar was used to pull the siren into contact with front tire.

If the pull chain broke it was immediately replaced with bailing wire. You quessed it ... I'm talking farm country repairs.



Jerry

 

[DRR-24V]

Fun With A Siren !!

Never looked inside one. But the CHP had a toggle switch on the dash, when it was on the horn ring worked the siren. We used to see a Buddy in a coffee shop, sneak up and flip the switch and then jam a matchbook under the horn ring. When he got back in his vehicle (Full of Doughnuts and Coffee) and started the engine the siren would scream. He would flip the switch and the horn would blast. Eventually in frustration, he would shut down everything. Guaranteed to draw a smirking crowd.

 

[Hummin Cummins]

AAAh, the Federal Q

Lovingly referred to as "the meat grinder"



Who ever makes the most noise wins

 

[Bob Wagner]

good memory

you are right on Dalton