Re: [TCML] Spark gap quandary

[Scott Bogard <sdbogard@xxxxxxxxx>]

Hi Shannon,
     I agree with Phil, The heat of the arc will eventually destroy the
disk at the hole edges.  What might work however, would be a flat disk with
metal electrodes flush to the surface, and stationary electrodes made of
heavy large diameter rollers, so there would not only be direct contact
during the first ring-up for lower losses, but the arc (which will tend to
stick to a given spot in the roller due to localized heating) will be
ripped away at a high speed (3 times the rotational speed of the disk.)  It
would be a bugger to build, but I imagine should give some performance
improvement with a sufficiently thin moving electrode, and whilst plastic
would still burn eventually, it could be minimized.  Problem is it will
ignite before the rollers make contact negating any benefits, but an air
blast might help with that.  Just my 2 cents.

Scott Bogard.

On Fri, Feb 10, 2012 at 8:59 AM, Phil Tuck <phil@xxxxxxxxxxx> wrote:

> Hello,
>
> In the "perfect world" scenario, a correctly sized slot in the rotating
> disc
> would mean erosion of the disc's exiting edge should not happen, as the gap
> should have naturally quenched at one of the notches anyway.
> This is like the misconception that an RSG quenches by 'ripping' the arc
> apart, which of course it doesn't - or at least shouldn't do, unless you
> want power arcing.
> Even if the slot was sized 'spot on' though, I would imagine the leading
> edge would still get ablated by the heat from the arc, as it makes its
> initial passage when the electrodes become uncovered.
>
> Phil
> .
>
>
> -----Original Message-----
> From: tesla-bounces@xxxxxxxxxx [mailto:tesla-bounces@xxxxxxxxxx] On Behalf
> Of Weinhold Shannon L
> Sent: 10 February 2012 00:48
> To: tesla@xxxxxxxxxx
> Subject: [TCML] Spark gap quandary
>
> Hello all.
> So I was doodling some ideas for a rotary spark gap I am thinking of
> building and an idea came to me.
> I envisioned a rotary spark gap utilizing a electrode-less spinning disk
> equipped with slots...fashioned in such a way so that the gap could only
> fire when the stationary electrodes were aligned with one of the slots.
> I'm thinking it could be pretty thin so that the stationary electrodes
> would
> be in close enough proximity that they would naturally arc if there was no
> barrier, and that the slots would be inset enough from the edges of the
> disc
> so that the arc could not wrap around the edge of the disk and make a
> connection during the break.
> Seems like it would make for faster quenching (immediate) and the slots
> could perhaps even be variable so that they could be tuned, allowing for a
> specific duration of connectedness. (I believe you folks refer to this as
> dwell?) No flying electrodes to worry about cleaning or machining into a
> form.
> Is it too good to be true?
> (I get it named after me if it works...lol)
>
>
> Shannon Weinhold
> Klasdja Intelligent Innovations
>
>
> -----Original Message-----
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> Behalf Of tesla-request@xxxxxxxxxx
> Sent: Wednesday, February 08, 2012 11:00 AM
> To: tesla@xxxxxxxxxx
> Subject: Tesla Digest, Vol 52, Issue 10
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