Re: Tesla's large pancake coil

["Tesla list" <tesla@xxxxxxxxxx>]

Original poster: "D.C. Cox" <resonance@xxxxxxxxxxxx>




In this drawing it was definitely an artist's sketch.

In reality, a completely flat spiral Tesla transformer did exist.  It 
is clearly visible in the rear of the photograph of Tesla's Houston 
Street Laboratory in New York City.  It was visible behind Tesla's 
"spinning egg" exhibit he was developing for the Columbian Expo 
World's Fair in Chicago.  A portion of this coil was tapped across as 
a primary, thus the partial primary drives the secondary --- very 
similar to the way a Variac can produce 140 or 280 vac from only 120 
vac or 240 vac input.

Dr. Resonance

>     Many of the fantastic illustrations and even a few of the Tesla 
> photographs from this era are known to be "conceptual 
> illustrations" (faked). Most famous of these photos is the one of 
> Tesla sitting next to a large helical coil while discharges strike 
> all around him (double exposure).
>      Some of the pen-and-ink illustrations used for press releases 
> were commissioned by Tesla himself. This was not unusual for the 
> time. Many of the cover illustrations for "Popular Science" and 
> "Popular Electronics" up to the 1960's were of devices that never 
> became reality.
>     In general, if some illustration seems too amazing or too 
> dangerous to make sense, it probably isn't real. A lot of amazing 
> science is much more amazing than science.
>
> Matt D.
>
>
> In a message dated 9/28/06 2:28:00 P.M. Eastern Daylight Time, 
> tesla@xxxxxxxxxx writes:
> Original poster: William Beaty <billb@xxxxxxxxxx>
>
>
>
> I stumbled across this newspaper illustration on Tesla Mem. Society site:
>
>    A Demonstration Made at Tesla's Laboratory Yesterday
>    http://www.teslasociety.com/pictures/teslaarticle2.jpg
>
>
> Odd that the discharge goes *away* from the coil.   The coil's EM field
> must sculpt the discharge path, no?
>
>
> This appears to be the same device which hung in Wardencliffe:
>
>    Wardenclyffe: exhibition of various inventions
>    http://www.teslasociety.com/pictures/labpic.jpg
>
>
> In these other famous photos, the sphere-electrode is not installed:
>
>    http://www.teslasociety.com/posters/teslalab.jpg
>
>    http://www.teslasociety.com/pictures/teslapic.jpg
>
>
> Here's another artist's conception, again showing the discharge going away
> from the coil.   I wonder if the discharge path was so reliable that Tesla
> could actually sit as shown below?  Or is it just an "artist's
> conception?"
>
>    http://homepage.ntlworld.com/forgottenfutures/tesla/tesla_4.gif
>
>
>
>
> (((((((((((((((((( ( (  (   (  (O)  )   )  ) ) )))))))))))))))))))
> William J. Beaty                      SCIENCE HOBBYIST website
> billb at amasci com                    http://amasci.com
> EE/programmer/sci-exhibits   amateur science, hobby projects, sci fair
> Seattle, WA  425-222-5066    unusual phenomena, tesla coils, weird sci