<!doctype html public "-//W3C//DTD W3 HTML//EN"> <html><head><style type="text/css"></style><title>Re: Was 'Short Treble' - trial by Calin T./comment</title></head><body> <div><font face="Arial" size="-1">At 11:34 PM +0000 6/11/03, Michael Gamble wrote:</font></div> <blockquote type="cite" cite><br></blockquote> <blockquote type="cite" cite><font face="Arial" size="-1">What an elegant design! I have been looking at your new Overs Action (patent pending) and comparing it with S&S and Langer. I find your jack spring very interesting - a form of single-winged - but it must be very strong to give the required hammer-rise: how thick is the brass wire for this?</font></blockquote> <div><br></div> <div>The spring pressure required is less than that required for lifting an equivalent weight hammer with a standard double wing spring type action. The wire for making the bass section springs is 0.7 mm diameter phosphor bronze.</div> <div><br></div> <blockquote type="cite" cite><font face="Arial" size="-1"> And your jack toe (tail) which should roll on the button and not rub.</font></blockquote> <div><br></div> <div>Indeed it does roll across the lett off button, and is one of the patent claims. If you are interested in further information, there's a detailed article in the Technical Stuff section of our website which describes the function of the action in detail.</div> <div><br></div> <blockquote type="cite" cite><font face="Arial" size="-1">One thing I think is due for further thought (though I am sure you have considered every possibility!) is the access to the jack regulation screw. This type of through-the-let-off button is darned difficult to access.</font></blockquote> <div><br></div> <div>Indeed, easy adjustment of the jack position was something that I was also mindful of when designing the action. This is why the let-off button screws are fitted directly into the hammer rail, without mounting them on a separate wooden rail. This, coupled with the deliberate positioning of the jack adjuster as high as practical on the jack, allows for a relatively easy adjustment of the jack position.</div> <div><br></div> <blockquote type="cite" cite><font face="Arial" size="-1"> . . . The angle of the capstan is also an excellent idea. It conforms to the radial movement of the lever (whippen) and presumably the lever bearing block is aeriated for strength and lightness.</font></blockquote> <div><br></div> <div>Yes, in the prototypes we drilled the black note wippen heels, which are made deeper than the white note heels in our action, to allow the capstan/heel to meet the on line of centres at half key dip for both white and black notes.</div> <div><br></div> <blockquote type="cite" cite><font face="Arial" size="-1"> Are the rails of wood or extruded alloy?</font></blockquote> <div><br></div> <div>The rails are currently of laminated wooden construction. Although I can't see any reason why a licensing manufacturer couldn't use extruded aluminium</div> <div><br></div> <blockquote type="cite" cite><font face="Arial" size="-1"> Are the action parts other than wood?</font></blockquote> <div><br></div> <div>At this time all of the action parts are made from hornbeam. I believe there is a good case for making the repetition lever, at least, from one of the high performance engineering plastics. But at this point in time there is considerable unjustified opposition to synthetic parts. I therefore will wait a while until our action is better accepted by technicians and the buying public before incorporating synthetic parts.</div> <div><br></div> <blockquote type="cite" cite><font face="Arial" size="-1">Is there a third drawing which shows the action in the "drop" position - ready for repetition?</font></blockquote> <div><br></div> <div>Yes, the action was developed<font color="#0000FF"> (prior to manufacturing precise models)</font> using five separate drawings to show the action  at various points of the key stroke. At this time, only two are publicly available on the website.</div> <div><br></div> <blockquote type="cite" cite><font face="Arial" size="-1">I wonder how your action compares to Signor Fazioli's - which I have never seen.</font></blockquote> <div><br></div> <div>Paolo Fazioli is using Renner actions for his production pianos at the present time. He has had one of my actions under test since earlier this year. However, I haven't heard a report from him as yet.</div> <div><br></div> <div>Best,</div> <div><br></div> <div>Ron O.</div> <x-sigsep><pre>-- </pre></x-sigsep> <div><font face="Times New Roman" 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><font color="#000000"><br> _______________________</font></div> <div><font size="-2" color="#000000"><br> </font><font color="#000000">Web http://overspianos.com.au</font></div> <div><font color="#000000">mailto:info@overspianos.com.au<br> _______________________</font></div> </body> </html>