H. Wabnig wrote:
On Mon, 11 Jun 2007 01:24:01 GMT, Angelo Campanella
wrote:
Salmon Egg wrote:
On 6/10/07 11:25 AM, in article
, "Angelo
Campanella" wrote:
Read my article in ASA's "Acoustics Today" (April '07 edition) about
Antonio and his telephone inventions, 1851-1872.
Do you have a web reference? Are the dates referring to his life or to his
inventive years?
And here's the Wikipedia reference:
http://en.wikipedia.org/wiki/Antonio_Meucci
Ang. C.
requires coils of really THIN copper wire.
Any historian ever looked at the manufacturers of insulated wires?
At what point in time did the wires become available?
w.
Anybody with reasonable skill any time after the discovery of
ironworking could have drawn exceedingly thin copper wire and insulated
it. All you need is iron or steel dies and lubricant for the drawing
process and lacquer for insulation. Copper is very easy to work and is
fairly commonly found on the surface of the ground in remarkably pure
nuggets, some quite large.
http://en.wikipedia.org/wiki/Wire
Wikipedia says wire drawing is nothing new, certainly not an industrial
revolution idea. Apparently stone dies were used at one time, no iron
necessary..
John