Re: Kool-Aid Acid Test, condesation of mists?

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

Original poster: Matthew Smith <matt-at-kbc-dot-net.au> 


Bill Mck wrote:
<snip/>
>experiment illustrating  the condensation of mists, vapors,fogs,or chimney 
>dust by electricity is shown in Figs. 90 and 91.
</snip>

Matthew replies:

Sounds to me like an electrostatic precipitator, invented by Fred Cottrell 
back in 1907.  Google found this: 
<http://www.invent-dot-org/hall_of_fame/34.html> but there's much more material 
out there on construction methods, etc.

I built a Cottrell device last year to try to get some of the dust out of 
the air in the house.  Air passes through corona wires, dust acquires a 
charge and is then attracted to subsequently opposite-charged plates.  Mine 
used a flyback and voltage multiplier to provide the charges.  AC works as 
well but with different characteristics.

Had a job keeping mine from arcing over and producing ozone so a TC may 
just be a bit of an overkill unless you've got HUGE electrode spacing.

Here's a picture of a really old lab version in action: 
<http://www.rescorp-dot-org/cottrell.htm>

Cheers

M

-- 
Matthew Smith
Kadina Business Consultancy
South Australia
http://www.kbc-dot-net.au