steel piano strings

[gordon stelter]

And the rotting remains of Roebling's first suspension
bridge is still over the Delaware River in Pennsyvania
( or upstate New York ? )saw it years ago.
     Thump
 
--- Mark Kinsler <kinsler33@hotmail.com> wrote:
> This short history of the piano:
> 
> http://www.uk-piano.org/history/d_grover.html
> 
> indicates that improvements in the heat-treatment
> (or tempering, in the 
> metallurgical sense) made
> it possible to use heavier strings that were under
> greater tension, which in 
> turn increased the
> loudness  and brilliance of the instrument.  Over
> the years,  the heavy 
> frame, iron plate and laminated pinblock were
> introduced to accomodate this 
> greater tension.
> 
> In my science demonstrations, I pass around a piece
> of piano wire (from the 
> hobby shop) along with
> a piece of coat hanger wire.  The students are
> fascinated to learn that the 
> composition of the two
> are almost identical, varying by a fraction of a
> percent of carbon.  The 
> difference lies in the heat
> treatment of the wires.
> 
> The development of high-strength wire for musical
> purposes was simultaneous 
> with its development
> for other industries.  A good deal of the initial
> metallurgical research was 
> done by John Roebling, who used it to make cables to
> move canal boats over 
> the great incline on the Pennsylvania Canal.  He
> later used the same 
> technology to build wire suspension bridges.  The
> most famous of these is 
> still in use: it is the Brooklyn Bridge in New York
> City.
> 
> M Kinsler
> 512 E Mulberry St. Lancaster, Ohio USA 43130
> 740-687-6368
> http://home.earthlink.net/~mkinsler1
> 
>
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