[pianotech] Early duplex Scale

[Alan Eder]

Aliquots? 


Is the would-be duplex tuned to a partial of the speaking length?


Alan Eder



-----Original Message-----
From: Joseph Garrett <joegarrett at earthlink.net>
To: pianotech <pianotech at ptg.org>
Sent: Tue, Mar 6, 2012 3:05 pm
Subject: Re: [pianotech] Early duplex Scale


David Boyce said: 
"I was intrigued to see an elegant duplex scaling, and more so to note 
that the little duplex bearing "plinths" (what's the proper name folks?) 
are made of WOOD! The piano was re-strung and hammers re-covered 30 
years ago, but these appear to be original. Would they be ebony, or 
lignum vitae?"
 
David,
I would call them "Bearing Bars", as that is the main reason for them...not
the supposed "sympathetic vibration enhancement" thang, as some would
suppose.<G> (otherwise known as "Duplex Scaling") (flack suit on, on this
one.<G>)
As for their composition, I'd say, more likely than anything, they're
Ebony. since a lot was used on pianos at that time.Probably getting rid of
the "scrap" left over from the sharps making.<G> Lignum Vitae was
considered a "junk wood", suitable only for pallets, shipping crates, etc.
The fishing industry has used it for many centuries.
Regards,
Joe


Joe Garrett, R.P.T.
Captain of the Tool Police
Squares R I


 

-------------- next part --------------
An HTML attachment was scrubbed...
URL: <https://www.moypiano.com/ptg/pianotech.php/attachments/20120307/9b6b8c5e/attachment.htm>