Upright and Grand rims, was: Impressive Steinway Upright

[Farrell]

> Bush and Lane(and a few others)
> made uprights with an actual curved, laminated "inner
> rim" which I believe acted as "cutoff bar" as well as
> sending the vibrations around the board and reflecting
> them back into it, like a grand rim would.

This is what I am describing on the S&S upright. And are you speaking in reference to the "magic circle of sound"? Does a laminated rim "reflect" sound better than a solid timber frame?

Terry Farrell
  
----- Original Message ----- 
From: "gordon stelter" <lclgcnp@yahoo.com>
To: "Pianotech" <pianotech@ptg.org>
Sent: Sunday, September 15, 2002 1:02 PM
Subject: Re: Upright and Grand rims, was: Impressive Steinway Upright


> So are these "rubbish sounds" just specific,
> sympathetic resonances picked up by the spruce in
> areas where he daming of the strings would not supress
> them ( corners?)? That's what I have always thought
> the "cutoff bars" were for: to dampen soundboard areas
> prone to this effect. Bush and Lane(and a few others)
> made uprights with an actual curved, laminated "inner
> rim" which I believe acted as "cutoff bar" as well as
> sending the vibrations around the board and reflecting
> them back into it, like a grand rim would.
>      Gordon Stelter
> 
SNIP