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Author Topic: Coming out from hiding  (Read 6634 times)

Offline DavesWimshurst

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Coming out from hiding
« on: April 19, 2009, 05:31:03 PM »
Hi,

I'm an exhibit designer/builder/repairman for a smallscience museum in Aurora Illinois.
I have been making models gadgets and scrap parts since high school in the mid 60's.
I thought I'd show some pics as an intro

A triplex sectorless Wimshurst machine with 18 inch disks  :zap: :bugeye:



some engines



an LTD Stirling engine



South Bend heavy 10 lathe with overhead drive to milling spindle



Closeup showing simple indexing



Bling free ball turning tool



I will try vids later

Dave


 
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ja2on

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Re: Coming out from hiding
« Reply #1 on: April 19, 2009, 05:42:31 PM »
hello and welcome  :wave:

that is an impressive ball turner you have there it looks enormous  :dremel:
i had to google Wimshurst machine  :scratch:
« Last Edit: April 19, 2009, 05:44:50 PM by ja2on »
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Offline DavesWimshurst

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Re: Coming out from hiding
« Reply #2 on: April 19, 2009, 06:34:10 PM »
Jason,
High voltage leaks off from sharp curves rapidly.  If I recall correctly this Wimshurst uses 2.5 inch balls.  I've made balls of 3.1 inch dia for another machine

A video



Dave
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Offline usn ret

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Re: Coming out from hiding
« Reply #3 on: April 19, 2009, 06:37:51 PM »
Welcome,  some very nice gizmos and gadgetry.  You are definitely a rooooky.
Cliff :coffee:
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Offline Brass_Machine

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Re: Coming out from hiding
« Reply #4 on: April 19, 2009, 07:24:39 PM »
Hey Dave!

About time you came out and posted. Welcome to the collective  :borg:

Very neat stuff. Whats a Wimshurst?

Eric
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Offline DavesWimshurst

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Re: Coming out from hiding
« Reply #5 on: April 19, 2009, 08:42:37 PM »
Eric,
A traditional Wimshurst electrostatic generator consists of two disks each with a band of foil sectors near the rim of each disk.
The sectors carry electrical charges from one side of the machine to the other.   A charged sector on one disk causes a charge
to be moved on the other disk from one edge to the opposite edge by means of a connecting brush assembly. This process occurs at
four locations, two on each disk.  The type of machine that I've built dispenses with the metallic sectors and uses charges sprayed
directly onto the surface of highly insulating fiberglass disks.
Such a machine is called a Bonetti machine after its inventor. A triplex machine uses multiple disks to greatly enhance the current.
This link provides more info on maqny designs of electrical inventions of the 18th and 19th centurys.

http://www.coe.ufrj.br/~acmq/electrostatic.html

The first picture on this site is of a Wimshurst machine.
Dave
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Offline Darren

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Re: Coming out from hiding
« Reply #6 on: April 19, 2009, 08:48:15 PM »
Hi Dave and welcome to the forum, some nice stuff you are showing us there.

I've already picked up some good ideas from your machinery setups  :thumbup:
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Offline Bernd

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Re: Coming out from hiding
« Reply #7 on: April 19, 2009, 10:16:45 PM »
Hi Dave,

What Eric said.  :thumbup:

Nice interesting "stuff". Hope to see some projects on here from you. :dremel:

Bernd
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bogstandard

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Re: Coming out from hiding
« Reply #8 on: April 19, 2009, 11:18:49 PM »
Welcome Dave,

The more eccentric and lateral thinking the better on here, I am sure you will fit right in.

Bogs
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Offline Divided he ad

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Re: Coming out from hiding
« Reply #9 on: April 20, 2009, 02:29:27 AM »
Hi Dave :wave:

I'm sure I've seen your name somewhere else? .... Maybe it was just when you joined?  :scratch:


I like the sparks off the machine  :zap: .... Probably a lot more than your "willing assistant" did  :lol: 

I like the link too.... It will be checked out further when I get a few hours!  :)


It's always nice to have another view piont on gadgetry 'n' stuff   :thumbup:





Ralph.



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Offline sbwhart

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Re: Coming out from hiding
« Reply #10 on: April 20, 2009, 03:03:20 AM »
Welcome aboard Dave

Some great bits of work you've showed us there:- thank you  :clap: :clap: :clap:

Love the South Bend lathe great machine

Stew
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