<!doctype html public "-//W3C//DTD W3 HTML//EN"> <html><head><style type="text/css"></style><title>Re: [pianotech] Curiously curvaceous repetition lever</title></head><body> <div>Susan,</div> <div><br></div> <blockquote type="cite" cite><font face="Courier New" size="+1">. . . Might there be a small coil spring hidden inside</font></blockquote> <blockquote type="cite" cite><font face="Courier New" size="+1">the curve, pushing directly against the top part of the jack?</font></blockquote> <div><br></div> <div><img src="cid:a06240815cc86cc899d69@[192.168.1.5].1.0"></div> <div><font face="Courier New" size="+1">I believe your speculation regarding a spring is correct, but it will be the repetition-spring which is doing the work for the jack return also. Notice that the rep' spring runs through what is almost certainly a slotted wippen heel. There must be a loop cord which we can't see, which is attached to the front of the jack (on the key-front side of the jack-centre), so that the spring provides the reverse jack rotation which is required to return it under the knuckle after lett-off. This is an interesting concept, because with this arrangement the jack escapement will be running in the same direction as the rotation of the roller as the let-off point is approached. Let-off should be a little less obvious in this action than it is with a conventional arrangement. The idea of the lower repetition-lever-centre is almost certainly intended to lower friction between the knuckle and repetition lever during the let-off. But I suspect that the centre has been lowered to such a degree that there may well be some friction in the opposite direction to that which is usual, with respect to a 'standard' action.</font></div> <div><font face="Courier New" size="+1"><br></font></div> <div><font face="Courier New" size="+1">Ron O.</font></div> <x-sigsep><pre>-- </pre></x-sigsep> <div><font size="+1" color="#0000FF"><b>OVERS PIANOS - SYDNEY</b></font></div> <div><font color="#000000"><i>   </i></font><font color="#0000FF"><i>Grand Piano Manufacturers</i></font></div> <div><font color="#000000">_______________________</font></div> <div><font size="-2" color="#000000"><br></font></div> <div><font color="#000000">Web http://overspianos.com.au</font></div> <div><font color="#000000">mailto:ron@overspianos.com.au</font></div> <div align="center"><font color="#000000">_______________________</font></div> <div align="center"><font color="#000000"><br></font></div> <div align="center"><font size="-1" color="#0000FF"><i>A web page with images of recent work and almost-audio-CD quality mp3 sound files of the Overs piano can be found at;</i></font></div> <div align="center"><font size="-1" color="#0000FF"><i>http://overspianos.com.au/more_info.htm</i></font></div > <div align="center"><font size="-1" color="#0000FF"><i><br></i></font></div> <div align="center"><font size="-1" color="#0000FF"><i>So put on your headphones, plug them into your freshly restarted computer and sit back to over 20 minutes of pure piano.</i></font></div> <div align="center"><font color="#000000"> _______________________</font></div> <div align="center"><font color="#000000"><br></font></div> </body> </html>