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Author Topic: Where's Van De Graff On This Board?  (Read 21118 times)

onthecuttingedge2005

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Re: Where's Van De Graff On This Board?
« Reply #15 on: August 17, 2009, 10:47:08 PM »
This is more along the lines of what I was referring.

in a bit I will take a picture of some of my samples and post it, I will see about making a 'short sample' of the belt I am talking about because all my samples are small squares and not of long lengths.

you can have custom weaves done, all the Kevlar, Glass, Carbon mix variety weaves I have are diagonal and not linear horizontal weaves. the only ones I have with linear weaves are the non mix weave types, I will have to get some linear samples of mix types.

Jerry ;)

onthecuttingedge2005

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Re: Where's Van De Graff On This Board?
« Reply #16 on: August 19, 2009, 12:30:13 AM »
It seems that OverUnity.com was down for two days on my end.

Here are the Kevlar, Fiber Glass, Carbon fiber samples I was referring about.

Jerry ;)

AbbaRue

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Re: Where's Van De Graff On This Board?
« Reply #17 on: August 19, 2009, 01:03:42 AM »
A Van De Graff generator produces static electricity through friction.
It's not collecting the electrons from the atmosphere it's producing them from friction.
It's like rubbing your feet across a carpet and then touching a door nob.
Van De Graff generators work best when the atmosphere is very dry,
because moisture in the air discharges some of the charge built up.
As 2 insulating materials are passed by each other in close proximity electrons get knocked off.
These electrons can then be collected using a form of capacitor.
The metal dome of the generator acts as a capacitor and collects this charge.
The initial charge applied to the belt acts as a polarizing charge to align the electrons. 
The charged belt acts something like an electret. (Electrets are something worth investigating further)

Of coarse some of the charge developed will come from the atmosphere but the bulk of the charge,
comes from electrons that where knocked off the belt. 
The same thing happens when 2 conductors pass each other in close proximity but the charge developed,
is immediately discharged again by the conductors to produce heat.
An insulator holds this charge just like the insulator of a capacitor holds the charge applied to the capacitor.


the_big_m_in_ok

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Re: Where's Van De Graff On This Board?
« Reply #18 on: August 19, 2009, 01:08:02 AM »
onthecuttingedge2005 said:
Quote
It seems that OverUnity.com was down for two days on my end.
I'm still! locked out on my mainly borrowed computer.  >:(   >:(   >:(    At least I'm not the only one.   ::)   ::)   ::)   ::)    This is another computer somewhere else in S.F.

Quote
Here are the Kevlar, Fiber Glass, Carbon fiber samples I was referring about.
Good.  You might be right about the carbon belts.  I did finally see a very good representative drawing from a university on the operation of the Van De Graaf.

Using a Greinacher or Cockroft-Walton circuit can charge up your Van De Graaf quicker with a pre-charge impulse at the outset.

--Lee

infringer

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Re: Where's Van De Graff On This Board?
« Reply #19 on: August 19, 2009, 01:21:50 AM »
More or less that almost looks like a cap with the sandwich of different materials ...

Or at least the diagrams I have seen of them rather interesting choice.


onthecuttingedge2005

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Re: Where's Van De Graff On This Board?
« Reply #20 on: August 19, 2009, 02:03:49 AM »

Using a Greinacher or Cockroft-Walton circuit can charge up your Van De Graaf quicker with a pre-charge impulse at the outset.

--Lee

Here I am stuck with old monitor Fly backs. I live in the mountains and the closest radio shack is 50 miles away.

Jerry :)

onthecuttingedge2005

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Re: Where's Van De Graff On This Board?
« Reply #21 on: August 19, 2009, 02:07:17 AM »
More or less that almost looks like a cap with the sandwich of different materials ...

Or at least the diagrams I have seen of them rather interesting choice.

Hi infringer.

I have a whole lot of ideas in my thick skull I am just waiting to try. I will see about getting some linear horizontal weaves of long lengths so I can make the first test bed belt, don't know when yet.

Jerry ;)

Paul-R

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Re: Where's Van De Graff On This Board?
« Reply #22 on: August 19, 2009, 04:58:34 PM »
Where can I find on this board any discussion of Van De Graff?  Danged if I don't zap myself with kilovolts everytime my shoes shuffle across the rug... 
You might be interested in this thread on the Hyde patent:
http://www.overunity.com/index.php?topic=6790.50
Unfortunately, Steven appears to have had a bit of a failure of
rotating machinery, and has gone rather quiet.
Paul-R

the_big_m_in_ok

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Re: Where's Van De Graff On This Board?
« Reply #23 on: August 19, 2009, 05:00:38 PM »
More or less that almost looks like a cap with the sandwich of different materials ...

Or at least the diagrams I have seen of them rather interesting choice.
The Testatika generator by Methernitha is another example of specially constructed capacitors.  I think only Methernitha knows what went the making of those caps.

Just a thought?  Can semiconductors like carbon be used in capacitors?  They're usually made of alternating layers of a matal and a nonconductor.

--Lee

the_big_m_in_ok

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Re: Where's Van De Graff On This Board?
« Reply #24 on: August 19, 2009, 05:32:53 PM »
You might be interested in this thread on the Hyde patent:
http://www.overunity.com/index.php?topic=6790.50
@Paul
I had a look at the Hyde patent; and both it and its reference sub-patents strike me as going back to the time of the then-popular 'influence machines' of 100-150 years ago.  Testatika is also one of these.

--Lee

onthecuttingedge2005

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Re: Where's Van De Graff On This Board?
« Reply #25 on: August 19, 2009, 05:53:53 PM »

Just a thought?  Can semiconductors like carbon be used in capacitors?  They're usually made of alternating layers of a matal and a nonconductor.

--Lee

Hi Big M.

Yes, they are called Ultra-Capacitors, they use Carbons high Surface area to store electrical charge to much higher densities.

just do a google on Ultra Capacitors, you shouldn't have a problem find out lots of info.

Jerry

the_big_m_in_ok

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Re: Where's Van De Graff On This Board?
« Reply #26 on: August 23, 2009, 06:33:48 AM »
onthecuttingedge2005 said:
Quote
Here I am stuck with old monitor Fly backs.
They're okay.  If you wire more than one in series, the voltage capacity goes up without cooking the turns in the secondary of just one transformer.

Quote
I live in the mountains and the closest radio shack is 50 miles away.
Right. I see.  But, you, amongst many people(e.g., city dwellers, especially) should know if 50 Hz line mains frequency AC contributes to power that impacts a long wire strung between two poles?  A few Overunity Members have had trouble generating much voltage away from power way out somewhere in their home county.

--Lee
« Last Edit: August 23, 2009, 05:23:03 PM by the_big_m_in_ok »

the_big_m_in_ok

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Re: Where's Van De Graff On This Board?
« Reply #27 on: August 30, 2009, 09:10:14 PM »
Clara Listensprechen said:
Quote
Where can I find on this board any discussion of Van De Graff?  Danged if I don't zap myself with kilovolts everytime my shoes shuffle across the rug. Anybody else besides me think that the Van De Graff and the 2N3055 oughta get married? Discuss.
@Clara...
Okay, as a patent, this comes fairly close, I think, especially in voltage levels:

#7,235,945
Energy Conversion Systems

http://www.google.com/patents/about?id=92OAAAAAEBAJ&dq=patent:7235945&as_drrb_ap=q&as_minm_ap=0&as_miny_ap=&as_maxm_ap=0&as_maxy_ap=&as_drrb_is=q&as_minm_is=0&as_miny_is=&as_maxm_is=0&as_maxy_is=

And with this particular design, I think the 2N3055 would be unnecessary.  Mere diodes should do the trick.  Fig. 14 of the patent has an embodiment I like.

--Lee
« Last Edit: August 31, 2009, 01:25:53 AM by the_big_m_in_ok »