<html xmlns:v="urn:schemas-microsoft-com:vml" xmlns:o="urn:schemas-microsoft-com:office:office" xmlns:w="urn:schemas-microsoft-com:office:word" xmlns:st1="urn:schemas-microsoft-com:office:smarttags" xmlns="http://www.w3.org/TR/REC-html40"> <head> <meta http-equiv=Content-Type content="text/html; charset=us-ascii"> <meta name=Generator content="Microsoft Word 11 (filtered medium)"> <o:SmartTagType namespaceuri="urn:schemas-microsoft-com:office:smarttags" name="PostalCode"/> <o:SmartTagType namespaceuri="urn:schemas-microsoft-com:office:smarttags" name="State"/> <o:SmartTagType namespaceuri="urn:schemas-microsoft-com:office:smarttags" name="place"/> <o:SmartTagType namespaceuri="urn:schemas-microsoft-com:office:smarttags" name="City"/>  <style>  </style>  </head> <body lang=EN-US link=blue vlink=purple> <div class=Section1> Old Hallet Davis with the high-low agraffe arrangement on the bridge to produce a net downbearing of zero.<o:p></o:p> <o:p> </o:p> <o:p> </o:p> <o:p> </o:p> <o:p> </o:p> <img width=757 height=370 id="_x0000_i1025" src="cid:image001.jpg@01CDB2E0.3F91F180"><o:p></o:p> <o:p> </o:p> <o:p> </o:p> <o:p> </o:p> <o:p> </o:p> Dean<o:p></o:p> Dean W May                (812) 235-5272 voice and text <o:p></o:p> PianoRebuilders.com    (888) DEAN-MAY        <o:p></o:p> <st1:place w:st="on"><st1:City w:st="on">Terre Haute</st1:City> <st1:State w:st="on">IN</st1:State> <st1:PostalCode w:st="on">47802</st1:PostalCode></st1:place><o:p></o:p> -----Original Message----- From: pianotech-bounces@ptg.org [mailto:pianotech-bounces@ptg.org] On Behalf Of Ed Foote Sent: Thursday, October 25, 2012 4:11 PM To: pianotech@ptg.org Subject: Re: [pianotech] Bridge agraffes FYI <o:p> </o:p> Our family piano was a 1875 or so Hallet & Davis upright.  It had <o:p></o:p> agraffes on the bridge, and they had holes slanted through them. The <o:p></o:p> wire would exit the hitchpin side from the low side or high side, since <o:p></o:p> every other one was turned so that the bearing was either extremely <o:p></o:p> negative or extremely positive.  The soundboard itself was perfectly <o:p></o:p> flat.<o:p></o:p>    sounded pretty good.<o:p></o:p> <o:p> </o:p> <o:p> </o:p> Ed Foote RPT<o:p></o:p> http://www.piano-tuners.org/edfoote/well_tempered_piano.html<o:p></o:p> <o:p> </o:p> -----Original Message-----<o:p></o:p> From: David Love <davidlovepianos@comcast.net><o:p></o:p> To: pianotech <pianotech@ptg.org><o:p></o:p> Sent: Thu, Oct 25, 2012 2:57 pm<o:p></o:p> Subject: [pianotech] Bridge agraffes FYI<o:p></o:p> <o:p> </o:p> <o:p> </o:p>    Attached are two photos of a Sohmer Grand bridge with bridge <o:p></o:p> agraffes.  Veryinteresting in that the string bears on the top of the <o:p></o:p> aggraffe hole, not onthe bottom as one might expect.  In order to <o:p></o:p> maintain positive downbearingon the bridge, the bridge has a raised <o:p></o:p> shelf behind the aggraffe such thatthe string runs uphill to the bridge <o:p></o:p>  from the hitch pin area before runningdownhill to the aggraffe from the <o:p></o:p> short span off the front of the shelf.The slope of the string then <o:p></o:p> rises as you move toward the tuning pintermination side.  Sadly, I did <o:p></o:p> not have my bubble gauge to try anddetermine the net bearing and it's <o:p></o:p> definitely got me reaching for the fishoil capsules thinking about <o:p></o:p> whether a measurement of the relationshipbetween the hitch segment and <o:p></o:p> the front segment would reveal the net bearinganyway.  The piano <o:p></o:p> sounded like caca, btw, but there were other issues.  Inspite of that, <o:p></o:p> the tone was surprisingly focused.  David Love<o:p></o:p> <o:p> </o:p> <o:p> </o:p> <o:p> </o:p> <o:p> </o:p> -----<o:p></o:p> No virus found in this message.<o:p></o:p> Checked by AVG - www.avg.com<o:p></o:p> Version: 2012.0.2221 / Virus Database: 2441/5353 - Release Date: 10/25/12<o:p></o:p> <o:p> </o:p> </div> </body> </html>