Re: Egg of Columbus

["Tesla list" <tesla@xxxxxxxxxx>]

Original poster: gbward4@xxxxxxx 


Hey guys.  There's a good picture of the EoC here: 
<http://www.tfcbooks.com/articles/tac2.htm>http://www.tfcbooks.com/articles/tac2.htm



And this is an excerpt from here: 
<http://en.wikipedia.org/wiki/Egg_of_Columbus>http://en.wikipedia.org/wiki/Egg_of_Columbus

"Tesla's device used a <http://en.wikipedia.org/wiki/Toroid>toroidal 
<http://en.wikipedia.org/wiki/Iron>iron core 
<http://en.wikipedia.org/wiki/Stator>stator on which four 
<http://en.wikipedia.org/wiki/Coil>coils were wound. The device was 
powered by a two-phase 
<http://en.wikipedia.org/wiki/Alternating_current>alternating current 
source (such as a variable speed 
<http://en.wikipedia.org/wiki/Alternator>alternator) to create the 
rotating magnetic field. A three-phase alternator would work just as 
well, if not better. The device operated on 25 to 300 
<http://en.wikipedia.org/wiki/Hertz>hertz current. The ideal 
operating frequency was described as being between 35 to 40 hertz. A 
reproduction of the device is displayed at the Nikola Tesla Museum in 
Belgrade and the Technical Museum i n Zagr eb."



Here's a good video of the one in the Tesla Museum: 
<http://www.youtube.com/watch?v=brNBVDCeECg>http://www.youtube.com/watch?v=brNBVDCeECg

And pic: 
<http://www.mdc.hr/tehnicki/media/07-velikani/vel2.gif>http://www.mdc.hr/tehnicki/media/07-velikani/vel2.gif



Oh, here's a pupman thread too, although not all that helpful: 
<http://www.pupman.com/listarchives/2003/May/msg00919.html>http://www.pupman.com/listarchives/2003/May/msg00919.html



Also, several sites report them to be terribly inefficient...



GB    :o)