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Technology: Magic magnets

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      CommentAuthorTrim
    • CommentTimeMay 27th 2010
     
    Source Physics World

    Short-lived tin is doubly magic
    • CommentAuthorUtD_Grant
    • CommentTimeMay 27th 2010
     
    Fucking fucking short-lived tin - how do they work ?
    •  
      CommentAuthorDuracell
    • CommentTimeMay 27th 2010
     
    Sorry Trim - Interesting article, but I cannot resist the temptation! ;)

    •  
      CommentAuthorpcstru
    • CommentTimeSep 22nd 2015
     
    Magnets. How the fuck do they work?
    •  
      CommentAuthorAngus
    • CommentTimeSep 22nd 2015
     
    Something like steam, apparently. Or ice. Whatever.
    •  
      CommentAuthorTrim
    • CommentTimeSep 22nd 2015
     
    Posted By: pcstruMagnets. How the fuck do they work?


    It must be catching first Andrew and now you, I suppose imitation is the sincerest form of flattery.
    •  
      CommentAuthorTrim
    • CommentTimeDec 4th 2015
     
    Po

    Magnetic invisibility cloak shields magnets from magnetic fields.

    http://phys.org/news/2015-12-magnetic-invisibility-cloak-shields-magnets.html
    •  
      CommentAuthorpcstru
    • CommentTimeDec 4th 2015 edited
     
    •  
      CommentAuthorTrim
    • CommentTimeDec 4th 2015
     
    Po

    Does Sean hold the patent for this?

    Magnetically controlled battery could store energy for power grids.

    http://phys.org/news/2015-10-magnetically-battery-energy-power-grids.html
    •  
      CommentAuthorAngus
    • CommentTimeDec 4th 2015
     
    I get about 0.25 MJ/cu m from the numbers in that article. It's not very impressive. Pumped storage or air pressure storage gives 1 to 2 MJ/cu m under reasonable assumptions.
    • CommentAuthorthehard
    • CommentTimeMar 23rd 2016 edited
     
    Another kind of magic magnets.

    These are really cool. And an actual innovation.

    https://www.youtube.com/watch?v=IANBoybVApQ

    (Interesting part starts at the 2 minute mark)
    • CommentAuthorAsterix
    • CommentTimeMar 23rd 2016
     
    Posted By: thehardAnother kind of magic magnets.

    These are really cool. And an actual innovation.

    https://www.youtube.com/watch?v=IANBoybVApQ

    (Interesting part starts at the 2 minute mark)


    Looks to me like just another fabrication method for multifaceted permanent magnets. That "magic latch" could be created by laminating smaller magnets. Now, if you can create on that doesn't require the rod that keeps everything on-axis, you might have something.
  13.  
    Argh. I did a demonstration build of this same principle for Joe Firmage back in the ISSO days in SFO. Sixteen or so years ago now. I made a prototype that I called "switchable permanent magnet" that was about the size of a thick business card. By pressing one end, the two overlapping flat pieces (magnetized in stripes) could be slid into and out of register, allowing the external field to vary from practically zero to strong enough to pick up nuts and screws etc. I presented the prototype to Joe at his 30th birthday party ("Joe 3.0") at the Exploratorium in SFO. It disappeared into his pocket, never to be seen again.

    Sixteen years ago!
  14.  
    Did Joe ever show you his blue ball?
    • CommentAuthorthehard
    • CommentTimeMar 24th 2016
     
    Do you still have any other version of the prototype, Al?
    •  
      CommentAuthorlegendre
    • CommentTimeMar 24th 2016 edited
     
    Sorry I'm late to the table.

    So who has the magic magnets, and how can I get some?

    Now..

    (ETA: Hey wow, it's sure nice to see Al is still around! Haven't heard from him in well over a year.. glad to know he's still in our midst..)
  17.  
    Posted By: Andrew PalfreymanDid Joe ever show you his blue ball?

    No.


    Posted By: thehardDo you still have any other version of the prototype, Al?

    No, but I suppose I could construct one.

    If only I had the motivation. And the tooling. And the raw materials.
  18.  
    Posted By: legendreSorry I'm late to the table.

    So who has the magic magnets, and how can I get some?

    Now..

    (ETA: Hey wow, it's sure nice to see Al is still around! Haven't heard from him in well over a year.. glad to know he's still in our midst..)


    Der Tod ist groß.
    Wir sind die Seinen
    lachenden Munds.
    Wenn wir uns mitten im Leben meinen,
    wagt er zu weinen
    mitten in uns.

    --Rainer Maria Rilke
  19.  
    It's all the diodes down the left leg.
    •  
      CommentAuthormaryyugo
    • CommentTimeMar 24th 2016
     
    Joe Fromage.

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