[pianotech] EMAILING: P7300009

[Claude Harding]

Mike,
  Thanks for the additional info.  Boy! Those balance rail mortises in the
photos are all over the place.
It is interesting to know that you have seen a lot of irregular front
mortises.  This is my first experience with this.
I guess if you do a ton of key work like you do, you see just about
everything.
 
Thanks again for the response.
Claude Harding

  _____  

From: pianotech-bounces at ptg.org [mailto:pianotech-bounces at ptg.org] On Behalf
Of Mike Morvan
Sent: Saturday, July 31, 2010 3:12 PM
To: pianotech
Subject: [pianotech] EMAILING: P7300009


Claude,
    This looks to me to just be an example of good old fashioned poor
craftsmanship. If you look closely, no two mortise angles are the same, in
fact one is nearly straight. This is pretty common and we see it here a lot,
but mostly in the mortises on buttons. Pratt & Read had oscillating routers
that cut all 88 of the front mortises and mortises in the buttons at the
same time, and they had alignment problems to beat the band resulting in
varying angles. There is no reason to offset the mortises in the front rail,
just the balance rail when the key angles get too steep. Nice picture
though, I've posted a few below as well.  Mike
 
BLACKSTONE VALLEY PIANO
Michael A. Morvan
76 Sutton Street
Uxbridge, Ma 01569
(508) 278-9762
www.pianoandorgankeys.com
mike at pianoandorgankeys.com
www.thepianorebuilders.com 
 

 

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