Saturday, 9 June 2018

Why does a spray bottle work?

quote [ I took apart a simple spray bottle to see how it kept fluid flowing only in one direction from the reservoir to the nozzle. It does so with simple check valves made of two pieces of plastic, a spring, and a small sphere. It’s a simple way to solve a tricky problem. ]

[SFW] [science & technology] [+5 Insightful]
[by arrowhen@4:48pmGMT]

Comments

midden said @ 10:37pm GMT on 9th Jun [Score:1 Underrated]
It's easy to forget that most people have no idea how basic things like this work, or even any interest in learning.
Hugh E. said @ 6:01pm GMT on 10th Jun [Score:1 Underrated]
Define "basic things".

Can you fix the tractor that supplies your food? Do you know how to raise food? Build a house? Make a dress? Or do you lack the interest in learning?

Most people have no idea how basic things work, because other people know how basic things work so other people don't have to. That's how society works.
midden said @ 7:53pm GMT on 10th Jun [Score:1 Yep ]
Yes, actually, I can probably fix the most common things that might go wrong with a tractor (honestly, though, probably only tractors made before about 1985). I do raise food. I have built houses. I'm not a great seamster, but I have made clothing from scratch and upholstered furniture.

However, those are all much more involved than understanding how a one way check valve works. I'm not talking about complex things like a modern tractor, or succession planting and crop rotation. I'm talking about how basic elements of our human engineered world work. How an electric motor works, both AC and DC. How a water faucet works. How a light pull switch works. How a basic internal combustion engine, like you might find on a lawnmower or chainsaw works. How a sewing machine does it's magic. How a vacuum cleaner works. How a flush toilet works.

These are basic things that don't take any special expertise. Part of what has turned our society into a culture that churns through literal mountains of disposable, short lived crap every year is the fact that we don't understand how things work, so that when they stop working, we are helpless.

Instead of spending ten minutes at the garage workbench with a screwdriver and a pair of needle nosed pliers fixing our widget, after which it will continue to work for another 20 years, we choose to throw out the non-working widget and order another one from the other side of the world, mass produced and cheaply made. The new one, shipped back and forth across the planet in various stages and pieces, often quite literally circumnavigating the planet, will probably only last a few years. It won't last because we, a: want the cheapest one we can find, and therefore b: it's not designed to last, and c: we have no clue how to fix things ourselves even if it was serviceable.

If we as a species hope to inhabit this planet for even just a few more centuries in something close to our current form, this behavior can not continue.
rylex said @ 1:05am GMT on 10th Jun
What do you mean? We all know they run on magic.
Ankylosaur said @ 1:39am GMT on 10th Jun
How else could they disrupt chemtrails from miles away? With science? That's just crazy talk.
rylex said @ 3:00am GMT on 10th Jun
Spray bottles were originally created to study the effects of chemtrails on a small scale before the government scaled it upwards
eggboy said @ 12:26am GMT on 10th Jun [Score:1 Insightful]
This feels like an onion article. Area man discovers simple every day technology is not in fact, magic.

This guy seems amazed check valves exist. What's he going to discover next, hinges? bearings? latch switches?
midden said @ 11:10am GMT on 10th Jun
I'm not bashing this guy or his well written explanatory article; good for him and his curiosity! Instead I wonder at a society where an article like this is even necessary.

This is the kind of stuff you should learn when you are eight, taking apart everything in sight to see how it works. If you run into some trouble putting it back together, mom or dad, an older sibling, or one of the neighbor kids can help. If they don't know, then surely Mr. Brown across the street, with his great garage workshop full of fascinating tools, will.
milkman666 said @ 5:45pm GMT on 11th Jun [Score:1 Underrated]
Being curious is a hallmark of the species. You do have outliers, some of them even get elected to office with the help of foreign powers. But on average we are all curious. Whats different now is that we use the internet as the source. You might as well complain how the Principia is a deathknell for human thought since its a book and not part of a rich oral history passed down by bards and medicine men. I can only talk about my own experience, and yes, we did learn about simple machines in school. I assume they still teach it. Whats even better is that unlike in my day, they don't have to search via a card catalogue, or dive into encyclopedias. They just need internet access.

Primitive Technology: Wattle and Daub Hut

27 million views.

How Its Made Motion Sensors

how its made, 396 episodes and counting.

People deep down haven't changed. The world that they live in has. Which is why makerspaces are a thing. Mr. Brown across the street? Is that his name?
knumbknutz said @ 1:30pm GMT on 10th Jun
My first leap into that was the living room telephone.

My folks were so proud...
midden said @ 4:43pm GMT on 10th Jun
It was the vacuum cleaner for me. I still hear about it, more than 40 years later.
arrowhen said @ 9:27pm GMT on 10th Jun
FWIW, I knew about check valves from having fixed something with a similar spring and ball mechanism when I was a kid (I don't remember what, a bicycle pump maybe? It was a long time ago) and intuitively understood that a spray bottle would require the same functionality, but I didn't know until I read the article that that thing was called a "check valve". That's always been a source of frustration for me: I can figure a lot of stuff out on my own but I don't know the terminology that I need to learn more about it.
backSLIDER said @ 6:58am GMT on 11th Jun
Man, all the words that name all the parts are very interesting. And the tools all have names. Like if it has a pointed handle on an adjustable wrench it is a spud wrench. And if you talk to a old timer they might call it a crescent wrench because they made them first or best or whatever. The adjuster for the balancer on a klr650 is called a doohicky. No joke.
zarathustra said @ 2:53am GMT on 12th Jun
mmm hmmm
knumbknutz said @ 1:27pm GMT on 10th Jun
You mean it's not fucking magnets that makes it work?

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