thats an acheivement getting a patent . I had a look 4260933 = 1979!
Thanks. Back then, there wasn't any Internet so I had to keep up by reading the weekly Patent Gazette at the Boise, Idaho public library - even some of the back issues. Once I ran across the Imris Tube patent (3,781,601) from 1973 I didn't waste any time filing my own patent. Both patents, his and mine, use a triangular outer grid with a cylindrical inner electrode, to provide a broad spectrum resonance. However, circular grids can be used for a specific, fairly low frequency resonance, if you know what it is.
then I had a look on wiki , "they" dont know what BL is .... my interpretation is then maybe they do 
I agree, based on some of the stuff I've seen.
also on the wiki page is an experiment over water dish = max planck institute
https://en.wikipedia.org/wiki/Ball_lightning
I used to follow what was then called the annual International Symposium on Ball Lightning. The wiki list is fairly complete, and my favorites were the Dynamic Capacitor Model of Ball Lightning (naturally occurring Electrostatic Inertial Confinement fusion, for propelling a "High Performance Manned Inter Planetary Vehicle"), and the Light Sphere SPL (Special Pattern of Light). Energy entering into the SPL never leaves, no matter how much is added. It just rotates around itself in two directions, rather than propagating off in a straight line. Neither does this effect get any bigger when more energy is added, with the size being wavelength based. It just gets more and more dense, like a space warp field with surface tension, until finally, when all the stored energy is caused to be released in a flash, it becomes . . . a photon torpedo. My friend Kiril Chukanov gave a presentation at ISBL3, but his Quantum Macro Object single particle theory isn't mentioned in the article. Also missing from the list is the Chaos Theory explanation which I adhere to. This theory holds that the sphere is composed of three flux lines, each folded a number of times and compacted to form the sphere. One of the flux lines can come from an antenna, in the form of normal EM, with the other two (from another antenna) having the form of a Longitudinal Wave. Or, EM can come from each antenna, with the earth's flux providing the third line. A dozen years ago, I took the plastic caps from two green Coleman camping propane bottles and put each one inside a screw cap from a beer bottle. Then I held them at an angle and showed them to a contact who had come down from Canada for a visit. He looked at them and said "There it is" without either of us saying what "it" was. Then he proved his knowledge by asking "How big is it?" A few years later, on the evening news, I saw footage of three really big, soap bubble like red lights coming up out of the ground out east of Phoenix. The balls danced merrily around each other as they went up and on out. So, yes, 'they' have it all figured out. (This demonstration throws a new angle on extracting Helium Three from lunar regolith. Ionize it, roll it, then bring it up out of the ground. No digging required.)
I've played with the MW oven plasmas. When confined with the top half of a plastic bottle, the color goes through stages, until it's hot enough to melt the plastic. The most interesting observation was that the plasma boils downwards from the bottom surface, then back up. But it doesn't form a ball when confined like this, it just takes on the shape of the container's top and stays flat on the bottom. Except for the boiling. An inverted Pyrex measuring cup doesn't break until the power is turned off and it cools unevenly.
I cant get my head around a suspended arc . fundamentals = a neg charge electron is attracted to a pos charge .
a lightning strike / electron flow is going from neg to pos , so BL is what ? a charge going no where
In some cases, the 'potential' is rolling in quadrature around two axes, magnetically curving nearby potential to do the same. But there's more than one natural effect described in the literature. Sometimes the longevity does depend upon on-going energy input from the environment. Here's a picture of my BL sticking to a wire:
(https://s20.postimg.io/mw5xi1n1p/plasmoidspark.jpg)