[GreenKeys] Copper Wire?

[Bob Camp]

Hi

Wire in jewelry has been around for a *long* time. Drawing wire in  
small batches isn't all that high tech. My guess is that copper wire  
in some form dates way back (say 2000 BC). It's safe to assume that  
there was copper wire lying around well before it had any use for  
conducting electricity.

Bob

On Aug 30, 2007, at 1:08 PM, Brooke Clarke wrote:

> Hi:
>
> While researching electro-magnets and reading the 1831 papers of  
> Joshph Henry I've learned that the horseshoe electro-magnets he  
> made used copper wire (1/40 to 1/20" dia) that he insulated with  
> Silk.  Later he changed to cotton that worked about the same but  
> was not as expensive.
>
> I've found references to iron wire making in 1565 for use in making  
> "cards" used to comb sheep's wool.
>
> Also bare "Bell Wire" which was used with mechanical force like in  
> a hotel or mansion where the servants were called by ringing a bell.
>
> But have not been able to get a date and application for copper  
> wire.  Maybe it was "Bell Wire"?
>
> Anyone know when and why copper wire came about?
>
> -- 
> Have Fun,
>
> Brooke Clarke
> http://www.PRC68.com
> http://www.precisionclock.com
>
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