Stubblefield coils (bifilar) and speculations

[Pirate88179]

@ All:

I was going through my picture file and rediscovered this one. (It was previously posted on the earth battery topic by me)  Do those coils on the left not look strangely like the pancake coils we have been talking about?  This is from an old patent.  I can find the info if everyone thinks it might be important.  I would have never made the connection back then, but in view of our current (no pun intended) discussions, and with the additional knowledge I have gained, this stood out to me.  What do you all think?


Bill

[jeanna]

Do those coils on the left not look strangely like the pancake coils we have been talking about?  This is from an old patent.
Bill

Yes, they do.

In patent 512340, Tesla mentions the previous way of making a bifilar pancake coil on which his an improvement. Perhaps this is the one to which he refers??

Nice to read this.

Just getting my hands on this stuff has informed me so much. I never could do anything with this patent before. I will study this. Interesting that they are strung together isn't it?

I am wondering about the way the NS coil bubbles and self destructs if you run battery juice through the primary wires. I was thinking about that when boosting the coil with the external carbon rods on the + and mag block on the - . I wonder about it now.

This is also appears to be hollow - no core piece like Gary's a little.

I wonder if that makes a difference to the bubbling.
EDIT:
I just downloaded the patent and those are sheets of metal made in a spiral. He is basically making probes in the ground and spacing them far apart. So, perhaps it is just a galvanic battery after all. UNLESS sheets in a coil have some special EM effect beyond just being sheets of metal. too bad, maybe

Thank you,

jeanna

[resonanceman]

@ Gary:

More ac than dc?  Yes, I would like to know more about this.  This was while winding?  I wonder what might have changed? I look forward to your pictures.

Bill

Bill

I dried  my pancake  out ......   no  wonder I didn't  remember any  readings .

I  get 0  V  DC  dry  ..........008  V AC   ......now on my  meter .....it reads  .007  V  AC  with nothing  attached to the leads .
There  may be something  strange going on .......I  knew there was a short in my original coil somehere .
I kept   checking   continuity  as I wound it  because of that .    I checked  the voltage at the same time .
I remember   getting  readings of   .010   V DC  and  .025   V AC  when I was  around  half way through .
At the time I thought .......the  readings are going up  pretty good .  it looks like   it  should  have  readings similar to my  origainal  coil .   

WHen   I got to the  part of the   copper that   had been around the outer   part  of the coil .........it was a little beat up ......so I wrapped another layer of fiberglass  around it ......and  then  didn't do any more  continuity  tests .

My pancake is   about  12.5   in  across  the hole  in the center is about 3 in

I have  spent  a couple  hours  trying  different connections

My gut  feelings about it  is ........ it is a very good  ...........something or other. 
My gut  feeling  also tells me   that it doesn't like to play alone .

I guess I am  going to have to make another one soon .



gary



I  tried to  add a picture of my   pancake

I  will  add it IF  I can  get it  resized .
This  50 KB thing really sucks

I have spent  the last   half  hour    trying to resize   it ......  I have been using  the  program  Stefan   suggested  in another thread .  ......I guess it was  programed in German .....it makes no sense to me .

At the moment if   sounds  like a better idea to start my own site rather than   waste more time playing silly  resizing  games

[resonanceman]

@ All:

I was going through my picture file and rediscovered this one. (It was previously posted on the earth battery topic by me)  Do those coils on the left not look strangely like the pancake coils we have been talking about?  This is from an old patent.  I can find the info if everyone thinks it might be important.  I would have never made the connection back then, but in view of our current (no pun intended) discussions, and with the additional knowledge I have gained, this stood out to me.  What do you all think?


Bill

Bill

This  looks interesting   

my first  observation .........  it is wired  different than Teslas       He connected the   end of the A wire with the start of the B  ....

I am going to  go read the  patent   

gary   

[resonanceman]

Bill

This  looks interesting   

my first  observation .........  it is wired  different than Teslas       He connected the   end of the A wire with the start of the B  ....

I am going to  go read the  patent   

gary   

Not to much  new there .

Except  a cheeper way to build a large cell ........and  clarifacation  on spacing

I had read  the  6 ft  rule  in a couple places ........

This  guy  says  that   they should  be  far apart .......even farther  if  they are driving   a high  resistance load .

I remember  reading that Stubblfield  said  that  the farther apart  the better .


gary