<br><br> <div class="gmail_quote">On Wed, Apr 2, 2008 at 11:00 AM, Michael Magness <<a href="mailto:IFixPianos@yahoo.com">IFixPianos@yahoo.com</a>> wrote:<br> <blockquote class="gmail_quote" style="PADDING-LEFT: 1ex; MARGIN: 0px 0px 0px 0.8ex; BORDER-LEFT: #ccc 1px solid"> <div> <div></div> <div class="Wj3C7c"><br><br> <div class="gmail_quote">On Tue, Apr 1, 2008 at 9:26 PM, <<a href="mailto:pianolady50@peoplepc.com" target="_blank">pianolady50@peoplepc.com</a>> wrote:<br> <blockquote class="gmail_quote" style="PADDING-LEFT: 1ex; MARGIN: 0px 0px 0px 0.8ex; BORDER-LEFT: #ccc 1px solid"> <div bgcolor="#ffffff"> <div><font face="Arial" size="2"><pre><font face="Arial" size="3">Matthew,</font></pre><pre><font face="Arial" size="3">The hammer butt spring (disconnected in your photo) engages in the loop.</font></pre><pre><font face="Arial" size="3">Debbie Legg</font></pre> <div><pre>Okay, so I decided to spend some time this evening looking into my Yamaha U1 I bought last year. The first thing I noticed was all the jacks are plastic. Was that to save money? And then I noticed something about the butt flanges. I was in the process of taking a few hammer shank centers out and testing the center pins using the traditional method of swinging the hammer by holding the flange, when I noticed the following (click link). <a href="http://farm3.static.flickr.com/2170/2381002693_3983592996_b.jpg" target="_blank">http://farm3.static.flickr.com/2170/2381002693_3983592996_b.jpg</a> What is the purpose of the white string that loops around the flange? I was unable to freely swing the hammers obviously, and I have not seen this before. What is it's purpose? Thank you for your help! Matthew</pre></div></font></div></div></blockquote></div>Sorry about the previous blank post. </div></div></blockquote> <div> </div> <blockquote class="gmail_quote" style="PADDING-LEFT: 1ex; MARGIN: 0px 0px 0px 0.8ex; BORDER-LEFT: #ccc 1px solid"> <div> <div class="Wj3C7c"><span id=""></span>Hi Matthew, what you are looking at is a copy of a Schwander action which differs from the average upright action, as you have noticed, by having</div></div></blockquote> <div>the hammer return spring built into the hammer butt rather than on a seperate rail. Upon further examination of your action you will also notice that it has a seperate jack slap rail, that is </div> <div>adjustable rather than just padding on the back of the letoff adjustment rail that usually serves as a jack slap rail on a regular vertical action. The point of these features is to make this a </div> <div>more accelerated vertical action than it's predecessors. I'm certain there are other less obvious differences in the geometry of this action but these are the 2 features that make it the most</div> <div>recognizable. The Schwander action was patented and was owned by Kimball the last I heard, I don't know if it was sold after they discontinued production of pianos or not. It has been </div> <div>widely copied by asian piano makers with minor variances to avoid having to pay royalties.</div> <div> </div> <div>Mike</div> <blockquote class="gmail_quote" style="PADDING-LEFT: 1ex; MARGIN: 0px 0px 0px 0.8ex; BORDER-LEFT: #ccc 1px solid"> <div> <div class="Wj3C7c"><span id=""></span><br><br clear="all"><br> </div></div>-- <br>The greatest challenge to any thinker is stating the problem in a way that will allow a solution.<br>- Bertrand Russell<br><font color="#888888"><br> Michael Magness<br>Magness Piano Service<br>608-786-4404<br><a href="http://www.ifixpianos.com/" target="_blank">www.IFixPianos.com</a><br>email <a href="mailto:mike@ifixpianos.com" target="_blank">mike@ifixpianos.com</a> </font></blockquote> </div><br><br clear="all"><br>-- <br>The greatest challenge to any thinker is stating the problem in a way that will allow a solution.<br>- Bertrand Russell<br><br>Michael Magness<br>Magness Piano Service<br>608-786-4404<br> <a href="http://www.IFixPianos.com">www.IFixPianos.com</a><br>email <a href="mailto:mike@ifixpianos.com">mike@ifixpianos.com</a>