Re: async rotory gap?

["Tesla list" <tesla-at-pupman-dot-com>]

Original poster: "Barton B. Anderson by way of Terry Fritz <twftesla-at-uswest-dot-net>" <tesla123-at-pacbell-dot-net>

Hi Marc,

I envisioned this as two rings on two different motors and the gap between
the two set as you would a
static gap. The quenching occurs from the air gap plus the fact the rings
are spinning causing the
rings to arc at multiple points along the ring. The spinning also cools. I
would imagine this would
work pretty good and you could set the ring gap as you would a static gap,
however, the voltage at
conduction should be far more consistant assuming the rings are truely
round and not flawed.

Actually if you think about this, little rings (say 2" diam.) could be
mounted to say 6 little dc
motors. Attach all 6 to the dc supply, flick the switch, and you'll have a
6 RRSG's (rotating ring
static gaps) which may require no fan. (or a single dc motor with a belt
drive setup for the rotating
rings). A lot of possiblity's.

Take care,
Bart

Tesla list wrote:

> Original poster: "Metlicka Marc by way of Terry Fritz
<twftesla-at-uswest-dot-net>" <mystuffs-at-orwell-dot-net>
>
> duncan,
> (sniped)
>
> Tesla list wrote:
> >
> > Original poster: "Dr. Duncan Cadd by way of Terry Fritz
> <twftesla-at-uswest-dot-net>" <dunckx-at-freeuk-dot-com>
> >
> > Hi Bart, David, All!
> >
>
> are the disks notched at the edges to make and break the arc? if not
> then how is the quench controlled?
>
> >
> > There is one further variety, which AFAIK has not seen service since
> > Marconi, but maybe there's someone out there who has done it and can
> > comment, and I'm posting this in the hope they will step forth and do
> > so!  It would be a particularly neat project for 2001 as it was the
> > device used in the first successful transatlantic transmission a
> > century ago.
> >
> > The main problem which the rotary was designed to cure is quenching at
> > high power, i.e. the prevention of continuous arc formation.  Whilst
> > the rotaries used by most (all?) these days use fixed and flying
> > electrodes, which limit the discharges to specific points on the
> > timing cycle (or pseudo-random if asynch) Marconi's original idea,
> > used in the Poldhu transmitter 100 years ago (the infamous
> > transatlantic "S" signal) was to use two (or more) rapidly rotating
> > disks spaced a short distance apart, their axes at right angles, with
> > the spark taking place between the rims of the disks.
> >
> marc m.