Jeanna,

my magnetic strength measurement is quite crude; how many paperclips can i lift with it! I have been able to create decent magnetic fields using test coils with 1.5V supplied to a simple copper coil wrapped around a 1/2inch diameter bolt that is 8inches long. Tests were with 1 coil layer only comprimised of #16 AWG insulated copper wire. Things were even better when I took (2) 1.5V AA batteries and ran them in parallel.

So generally speaking, assuming magnetic field big enough for inductive effect, collapse of this primary field inductively transfers the energy to the secondary coil. So this is why I have been so interested in magnetic aspects of the design. So it would seem that we need a strong magnetic field to utilize the inductive effects Stubblefield mentions.

I'm getting to the point that the battery itself will never self generate magnetic fields of useful nature. My experiments with externally powered coils have shown me that lots of volt-amps needed to do this. (at least with materials / apparent dimensions listed in the patent)

If the magnetism were naturally supplied by earth somehow, then some problems seem to get solved. I think I am going to run my next experiements geared at supplying external magnetism to the system. I just can't seem to make any of the design's other aspects explain the results Stubblefield achieved.

In the end, I have a lot more to learn over here


thanks!

So it would seem that a constantly fluxuating / strong magnetic field is what we need. I have read about various methods to oscillate (from mechanical means to spark gap means).

To me a Stubblefield battery of value would need the following aspects:
1) strong magnetic field that oscillates. such field strong enough to allow for induction to occur through coils.
2) either lots of amps in the cell or lots of volts in the cell - so that through induction games, a useful voltage AND current is produced. My particular goal would be 12-13VDC at .5-1Amp. (enough to slow charge a car battery that operates a household array of LED lighting)
3) integral voltage production (already present)
4) long term / constant operation

I am now reading the very nice induction coil book written by Frederick Collins (circa 1909). This is a great book full of nice coil constructional information. I recommend this to everyone here. It is available through Google Books and is a 12MB file.

MW383
Please provide an actual link to that book.
I was not able to get it from a google search.

Thanks

jeanna

Jeanna, I believe he meant this one:

http://www.archive.org/details/designconstruct00collgoog

I have the actual hardcover book by Collins on radio waves.  It is very interesting.  Here is my bookmarked google link to a list of his books to download.
http://www.archive.org/search.php?query=creator%3A%22Collins%2C%20A.%20Frederick%20(Archie%20Frederick)%2C%201869-%22

protonmom,

yes this is the link! what is interesting so far in my readings, is that the book deals with standard inductive coil designs and not necessarily Stubblefield's version of it. but for beginners like me, it is good book to read. if anything, there are various materials tables there that indicate various relationships/dimensions/quantities between parts. there is also a very nifty way at visually displaying the magnetic field created by the primary (jeanna seems to have a similar method). based on what the field looks like, the secondary coils are then built in such a fashion (multiple discs) that allows maximum absorption. this can be seen by smaller coil discs on ends where field is weaker, and progressively thicker coil discs towards the center where field is stronger and extends out further. all real nifty stuff. primary coils seem uni-directional in this book. bifilar winding schemes also increase magnetic field. all neat information for a beginner like me...

Stubblefield patent and pictures pretty vague in my opinion. it basically says to create the windings like the picture. we already know that some aspects of the picture are inconsistent; like # of coils in relationship to wire end location (all one side). Nothing in the patent necessarily says to wind one layer in one direction and wind the very next layer in the opposite direction. it just says to do it like the picture. if we were to also do things like the picture then i guess we would have to make sure that all copper and iron wires were precisely wound on top of each other throughout the various layers; something I find impossible to do at this point. so i am thinking of various small experiments that hopefully clear things up.

IF we were to subscribe to the various statements that state:
1) useful power to be drawn from the heavier guage primary coil
2) auxillary secondary coil used as a trigger.
3) system acts as a pump, actions in the 'battery' trigger a very strong earth response.
etc...

THEN i assuming that there is much more to the primary coil i do not understand (especially its exact construction) and that while induction seems to be a part of things, it is not necessarily the usual standard induction coil design.

polarity is another thing that intrigues me. especially where it oscillates between the 2 sides. this could possibly be linked with the pumping action / strong earth responses. maybe it can be linked to coil construction?

i like a good mystery and this 'battery' definitely fits the bill