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Re: [TCML] Tesla's spinning egg of Columbus





William Beaty wrote:

On Sun, 16 Nov 2008, Lau, Gary wrote:

I've not studied the topic beyond a casual interest, but the choice of a
toroidal core seems curious to me.

It Tesla's induction motor stator.  I suspect this whole idea was Tesla's,
dating at least back to his DC motor work for Edison corp or perhaps
earlier.  It's in his patent drawings ...but did any earlier inventors
already use the idea?  It comes from an odd viewpoint, using coils 90deg
from usual orientation, so I wouldn't be surprised if NT was the source.

    I believe the original idea probably goes back to Gramme:

    http://chem.ch.huji.ac.il/history/gramme.html

Tesla certainly seemed attracted to that configuration but it was around before his time, or at least long before the Columbian Exhibition.

Ed

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