What's inside a fire alarm


#1

[Read the post]


#2

What’s inside a fire alarm?

Nothing but trouble, and that starts with T and that rhymes with P and that stands for PULL.


#3

It’s called SIMPLEX, what did you expect?


#4

They should make one like this: https://youtu.be/aqAUmgE3WyM


#5

It is what is on the other side of the wall that is interesting…


#6

When I was a lad, the common schoolyard knowledge was that the little hole at top center was a nozzle that would squirt messy ink all over you when you pulled a false alarm at school, so we never did so. Later, I bought a surplus one of these (the slide-down instead of pull-out variety), and installed it in my bathroom as the light switch. I lived in a party house, so it was a lot of fun at parties. It lasted five years!

I must point out that the little hole at top center is the set screw that holds the thing closed. No nozzle with messy ink to be found.


#7

yes, where the hell is the blue ink squirter!? I have been deceived!


#8

Actually, a spray of some degradable UV-reactive dye (maybe something that air-oxidizes away?) or some other taggant would be a good way to find who pulled the alarm if it was a false one.


#9

I came to say exactly the same thing. How did urban legends like this spread to schools across the country before the internet?


#10

I regret that I have but one like to give this comment!


#11

The ink-squirter was a central plot point in Bruce Coville’s My Teacher Fried My Brain and I always assumed it had some basis in fact, but I can’t say I would have heard of it otherwise.

(There should be somewhere one can go and yank on different shapes of disconnected fire alarms to one’s heart’s content.)


#12

Was it the same stuff that they put in the swimming pool?


#13

For figuring out who peed in it?


#14


#15

the terrorism alarm seems to be much bigger ‘fun’ these days.


#16

Terrornoia.

Back when I was in high school, I considered calling the cops and reporting a calorimeter bomb in the ground floor lab. (It was really there, that fairly massive pressure vessel of the bomb calorimeter.)

Later I confessed to my teacher and he said with a smirk that I should’ve done that.


#17

All I have to say is that I’m also very disappointed.

A toggle switch…:confused:


#18

Or just wait until someone outs the person. It is my experience that teenagers these days cannot keep secrets. I think it’s a mixture of social media and overwhelming trust. It’s kind of sweet.


#19

When I was a lad, the teachers promulgated the same story, cheerfully lying to the little tykes to foster obedience and fear.


#20

hey! toggle switches are totally fine!