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<DIV><FONT face=Georgia size=2>I'll be working on it =
again towards the end
of the week. I can take pictures and will see if I can't get them posted =
soon
thereafter. </FONT></DIV>
<DIV><FONT face=Georgia size=2>Basically it looks like a miniature =
of the flat
steel spring used on the pedal trapwork. An eyeglass size screw and pin =
fastens
it to about the middle of the jack. There is a 1/4 inch thick piece of =
felt
glued on the back of the catcher covering the hole the bridle strap =
comes
through. As the jack trips out at let off, the spring pushes against =
that felt
on the catcher and forces the hammer back towards the strings. There is =
a slight
backwards wink of the hammer before the hammer goes forward. It is =
my
feeling that the amount of wink should be the same and it should be =
sufficient
enough to achieve a proper checking distance. In this case I think the =
checking
distance should be 1/2 inch because the spring adds to the acceleration =
on
repetitive blows but any less distance weakens the force of the blow too =
much.
</FONT></DIV>
<DIV><FONT face=Georgia size=2>As I write this I'm getting the =
feeling I want to
mess with the thickness of the felt instead of the spring or I'll =
end up
with one of those actions with all those pieces removed. (broken). Is it =
worth
it? When this action is working at it's optimum, it probably performs =
quite
well. If I am not going to bring it back to spec I can see a possibility =
that
hammers could block as regulation goes out. </FONT></DIV>
<DIV><FONT face=Georgia size=2>Does anybody know any different from =
what I'm
assuming here? Checking distance, etc.</FONT></DIV>
<DIV><FONT face=Georgia size=2>Keith Roberts</FONT></DIV>
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<DIV style="FONT: 10pt arial">----- Original Message ----- </DIV>
<DIV
style="BACKGROUND: #e4e4e4; FONT: 10pt arial; font-color: =
black"><B>From:</B>
<A title=kam544@gbronline.com =
href="mailto:kam544@gbronline.com">Keith
McGavern</A> </DIV>
<DIV style="FONT: 10pt arial"><B>To:</B> <A =
title=pianotech@ptg.org
href="mailto:pianotech@ptg.org">Pianotech</A> </DIV>
<DIV style="FONT: 10pt arial"><B>Sent:</B> Sunday, March 07, 2004 =
7:58
AM</DIV>
<DIV style="FONT: 10pt arial"><B>Subject:</B> Re: Mason & Hamlin =
upright</DIV>
<DIV><BR></DIV>
<DIV>At 11:08 PM -0800 3/6/04, Keith Roberts wrote:</DIV>
<BLOCKQUOTE cite type="cite"><FONT face=Georgia>I'm working on one =
of
those M&H uprights with those flat brass springs between =
the jack
and the hammer butt catcher. Is there an adjustment for those?
...</FONT></BLOCKQUOTE>
<DIV><BR></DIV>
<DIV>Keith,</DIV>
<DIV><BR></DIV>
<DIV>Any chance you could get a pic of that device? I don't recall =
ever seeing
that arrangement.</DIV>
<DIV><BR></DIV>
<DIV>Keith</DIV><X-SIGSEP><PRE>--
</PRE></X-SIGSEP>
<DIV><FONT color=#000000>Keith
=
McGavern <SPAN=
></SPAN>  =
;<SPAN></SPAN>  =
; <SPAN></SPAN>
Texas State Association</FONT></DIV>
<DIV><FONT color=#000000>Registered Piano
=
Technician <SPAN></S=
PAN>
SOONER SPRING SEMINAR</FONT></DIV>
<DIV><FONT color=#000000>Oklahoma Chapter
=
731 <SPA=
N></SPAN> &nbs=
p;<SPAN></SPAN>
March 11-14, 2004</FONT></DIV>
<DIV><FONT color=#000000>Piano Technicians
=
Guild <SPAN></=
SPAN> <S=
PAN></SPAN>
http://www.ptg.org/tsa/</FONT></DIV>
<DIV><FONT color=#000000>USA</FONT></DIV>
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