Wapin bridge

[Carl Meyer]

What else was done to the piano along with the Wapinization?

Carl Meyer  Assoc. PTG
Santa Clara, California
cmpiano@attbi.com 


----- Original Message ----- 
From: "David M. Porritt" <dm.porritt@verizon.net>
To: <pianotech@ptg.org>
Sent: Thursday, January 24, 2002 4:59 PM
Subject: Re: Wapin bridge


> Yesterday I tuned a Wapin Knabe 6'4" that is really very nice.  Round
> tone, smooth, slow decay even in the killer area.  Very nice piano
> indeed.  I tuned it before it was "Wapinized" and while nice, it was
> not what it is today.
> 
> dave
> 
> *********** REPLY SEPARATOR  ***********
> 
> On 1/24/02 at 3:54 PM Ron Nossaman wrote:
> 
> >>It strikes me that the main thing about the Wapin arrangement is
> the 
> >>near perpendicular disposition of the front pin.  Without reading 
> >>right through the patent I can't be sure if he says anything about 
> >>the way the "bearing point edge" is cut and whether a small
> vertical 
> >>drop is desirable (a feature Wolfenden admires in the practice of
> one 
> >>maker, probably Ibach) or whether this angle should be at least 
> >>steep, as it certainly is not on the Steinway.
> >
> >Yes, the vertical pin is the pertinent point. Tim Coates
> straightened me
> >out on this a while back. The purpose of the vertical pin is to
> steer the
> >string oscillations to horizontal, or parallel to the soundboard.
> This
> >slows energy transfer to the bridge/soundboard and extends sustain
> as a
> >result.
> >
> >
> >Ron N
> 
> 
> _____________________________
> David M. Porritt
> dporritt@mail.smu.edu
> Meadows School of the Arts
> Southern Methodist University
> Dallas, TX 75275
> _____________________________
>