<HTML><BODY style="word-wrap: break-word; -khtml-nbsp-mode: space; = -khtml-line-break: after-white-space; ">WHAT A GREAT POST!!!<DIV><BR = class="khtml-block-placeholder"></DIV><DIV>(Perhaps you could get some = work in the Journal too!)</DIV><DIV><BR = class="khtml-block-placeholder"></DIV><DIV>:)</DIV><DIV><BR><DIV><DIV>On= Feb 21, 2006, at 1:11 PM, Aaron Bousel wrote:</DIV><BR = class="Apple-interchange-newline"><BLOCKQUOTE type="cite"> I thought = I'd seen every possible configuration of a vertical piano over the past = three decades, but I saw one recently that was new to me. This is an = Estey made in 1891. I'm attaching a sketch I made but here's how this is = supposed to work. The backcheck is in two parts, and pivots by a center = pin towards the top. There is a coil spring towards the bottom. The idea = is that upon release of the hammer from check the backcheck will give a = little push on the catcher, just enough to help the jack get back = against the butt felt. There's a set screw at the very top of the = backcheck which limits the travel of the piece that pushes the catcher. = The piano was in such poor condition that there was no way I could see = if this theory actually worked in practice, though I don't see why it = wouldn't. <SPAN><DIV><estey-backcheck.jpg></DIV></SPAN> <BR> = Aaron<BR><BR> <BR> <X-SIGSEP><P> <FONT face="Eras Medium ITC"> = ------------------------------------------<BR> Aaron Bousel<BR> = Registered Piano Technician, Piano Technicians Guild<BR> </FONT><FONT = face="Eras Medium ITC" color="#0000FF"> <A = href="mailto:abousel@comcast.net">abousel@comcast.net</A><BR> = </FONT><FONT face="Eras Medium ITC">(413) 253-3846 (voice & = fax)</FONT> </P></X-SIGSEP></BLOCKQUOTE></DIV><BR></DIV></BODY></HTML>=