agraffes on bridge?

[Brian Henselman]

Yeh,

I've always wanted to know about agraffs on bridges.  I've seen this system
on old Sohmer grands too.  Aren't agraffs best suited to providing an upward
bearing surface?  I thought that we want "downbearing" on bridges.  Would
the use of agraffes on the bridge pose potential energy transmission
problems?  I've never measured the downbearing on an old Sohmer grand to
confirm that it was providing downbearing.  Even if does,  wouldn't agraffs
on the bridge risk buzzing during the winter if the crown was particularly
flat?  I'd love to hear an explanation of this system.

-Brian Henselman


-----Original Message-----
From: Jonathan Adams <jmadams@telusplanet.net>
To: pianotech@ptg.org <pianotech@ptg.org>
Date: Wednesday, September 22, 1999 10:09 AM
Subject: agraffes on bridge?


>
>Dear List,
>
>I had the opportunity to view a Hallett & Davis grand that had undergone a
>rebuild.  What struck me as odd was the fact that instead of the standard
>bridge arrangement, agraffes were used on the bridge to provide
>termination.  I am wondering if this piano would have originally been
>constructed in this manner, or if this would have been a change made by the
>rebuilder.  Comments?
>
>Stacy Adams
>PTG Associate Member
>