My mum had one of those, she used it to get us kids to come home when it was dinner time etc. it was really noisy and could be heard from a mile away. It was my grandfathers who used it during WW2!
Thank you for showing each step and saying how long it took to get the paint off. I'm not as fast as you, but I don't have to feel so pathetic when I'm trying to restore objects.
this is a siren that was used by firefighters. Its from Poland 🇵🇱, The plate says the year it was manufactured in, the type, the series, the number, and the price. idk what KJ means though.
if you crack that out loud on the streets your going straight to court. even tho we dont exactly use these any more. it still does what it is meant to do
Also, a siren works by the fins (vanes) sucking in air through the front and centrifugal forces fling the air outwards and away from the rotor and pass through the stator. Since the rotor and stator is slotted, it pulses the air. And thus creates an on and off popping sound. This can be sped up to create a tone. In this case, there are 12 holes, therefore making it 12 ports. The slot count on the stator doesn't really matter but it's most efficient if the stator slots are the same size as the rotor slots. The smaller the gap between the rotor and stator, the louder the sound will be. You can also create dual-toned sirens. It's just two rotors and stators or 1, (See ACA Screamer S-10) with different port counts. TLDR A siren pulses air via sucking through the front and blowing outwards and creates noise
Usually you can wash old grease and oil with either paint thinner or gasoline. At least non silicone grease that is. They are byproducts of oil refining, and carbon based lubricants can be dissolved in them. The only potential problem may be plastics that paint thinner and gasoline can attack.
As a kid my brother was in the Marines during the war and I remember playing with this type of siren but it was a smaller one . If I remember correctly it was about 8-10 inches in dia. Also had Japanese swords 😊
Nice restoration, but I wish you hadn't kept saying how far back 1979 was and how old the siren is as I was born in 1976! 😱😭 Way to make me feel ancient!
call me weird, but personally i prefer when something looks weatherned and used then bran spanking new, these videos are great though for figuring out how things work.
