h a l f b a k e r yWhy not imagine it in a way that works?
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Alright so this might seem a little
complex
but I assure you that it's not even close
to
some of the other things on this site.
A series of magnetic tiles would be fixed
to the ceiling and floor. A panel would be
provided that was wired to the panels. An
iron box with an interior made
of wood
would be placed in the center of these
panels. You would place the items you
wished to store in the interior of these
boxes. The panel would have buttons to
increase or decrease the levitation of the
box. you would have to manually input
the
weight of the box with everything in it for
the panels to know how much power to
exert.
Storing items vulnerable to magnetism?
Although this hasn't been proven
completely harmless, there is a theory
that
even though you cannot block
magnetism
fully, you can guide the path it travels.
The
iron on the exterior of the box would
attract the magnetic currents instead of
penetrating the wood.
Ideas or opinions?
Kind of like these?
http://images.googl...&btnG=Search+Images
Floating globes. [BJS, Jun 07 2007]
[link]
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Damnit. I read this as Mango storage. |
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It's an interesting vision, but the distance from the floor and ceiling would be too far for magnets, even if a control system was made to regulate the height. 'tis a pity, 'cos it would be fun. |
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Mumetal is good at shielding magnetic fields. I used it on CRT monitors before those flatscreen displays became available/cheaper. Electric Arc Furnace magnetic fields used to make the screens unreadable. |
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[Custardguts] I just woke up and bleary eyed, I read the same thing...mmmm mangoes. |
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How are you going to keep the boxes from clamping on to the ceiling? Even if you perfectly balance the forces at the moment you load the box (so the box is hovering half way between floor and ceiling) any perturbation is going to either bump the box up (and have it clamp to the ceiling like Mel Gibson on a bottle of Chivas) or bump it down and have it crash to the floor (like Mel once the bottle is empty.) |
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Somewhere to keep Japanese comics? |
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[Ling] Thanks for that. I'll research that. |
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[Galbinus Caeli] If you modifyed the
strength of the magnets so that the
power they're exerting is in equilibrium
with each other then they wouldn't
clamp. |
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[Custardguts, xandram] Now I want
mangoes....... |
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[coprocephalous] Whatever floats your
boat I guess...... |
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What Galbinus Caeli said (just not as funny.) |
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In order to magnetically levitate something, you have to either spin it or continuously adjust the strength of the magnets. You can't type in the weight, and position the box, accurately enough - and even if you had it right, the slightest change in forces - due to the movement of air, say, or of materials due to temperature - would make it tip over. It's like balancing a boulder on the head of a pin - it's theoretically possible, but you're not going to ever get it right, and it wouldn't last if you did it. |
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The usual set up for this kind of experiment is much simpler, and involves just one magnet (on the ceiling) and a light-controlled switch - if the falling box obscures a light beam, that turns on a magnet; the magnet pulls up the box; that closes the light circuit, which turns off the electro magnet, causing the box to fall again, etc. If you wanted to control the height with a knob, you could replace the simple on/off sensor with a distance measure, e.g. by reflecting a laser from the floor against the bottom of the box. |
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So, if you'd bothered to build this, it would be easier to use than what you describe. |
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Further to what jutta said, google "Earnshaw's Theorem". |
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Can't imagine the amount of power this would require. |
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[jutta] Maybe it's just somthing for a
distant tomorrow.... |
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[xaviergisz] Thanks for that. Makes sense. |
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[RayfordSteele] Well the efficiency wouldn't
be high so I'm guessing a lot. |
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I wonder whether this might work better if the box were magnetically repulsed from the floor, rather than attracted to the ceiling, so that gravity would give you a comfortable equilibrium point? I suppose one problem with that would be how to prevent the box from capsizing, then plummeting; any sort of framework to prevent this might spoil the whole 'levitation' effect. |
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If it were repulsed, then a single hit could
send it shooting out at a 100mph |
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