Old Hallet Davis with the high-low agraffe arrangement on the bridge to produce a net downbearing of zero. Dean Dean W May (812) 235-5272 voice and text PianoRebuilders.com (888) DEAN-MAY Terre Haute IN 47802 -----Original Message----- From: pianotech-bounces at ptg.org [mailto:pianotech-bounces at ptg.org] On Behalf Of Ed Foote Sent: Thursday, October 25, 2012 4:11 PM To: pianotech at ptg.org Subject: Re: [pianotech] Bridge agraffes FYI Our family piano was a 1875 or so Hallet & Davis upright. It had agraffes on the bridge, and they had holes slanted through them. The wire would exit the hitchpin side from the low side or high side, since every other one was turned so that the bearing was either extremely negative or extremely positive. The soundboard itself was perfectly flat. sounded pretty good. Ed Foote RPT http://www.piano-tuners.org/edfoote/well_tempered_piano.html -----Original Message----- From: David Love <davidlovepianos at comcast.net> To: pianotech <pianotech at ptg.org> Sent: Thu, Oct 25, 2012 2:57 pm Subject: [pianotech] Bridge agraffes FYI Attached are two photos of a Sohmer Grand bridge with bridge agraffes. Veryinteresting in that the string bears on the top of the aggraffe hole, not onthe bottom as one might expect. In order to maintain positive downbearingon the bridge, the bridge has a raised shelf behind the aggraffe such thatthe string runs uphill to the bridge from the hitch pin area before runningdownhill to the aggraffe from the short span off the front of the shelf.The slope of the string then rises as you move toward the tuning pintermination side. Sadly, I did not have my bubble gauge to try anddetermine the net bearing and it's definitely got me reaching for the fishoil capsules thinking about whether a measurement of the relationshipbetween the hitch segment and the front segment would reveal the net bearinganyway. The piano sounded like caca, btw, but there were other issues. Inspite of that, the tone was surprisingly focused. David Love ----- No virus found in this message. Checked by AVG - www.avg.com Version: 2012.0.2221 / Virus Database: 2441/5353 - Release Date: 10/25/12 -------------- next part -------------- An HTML attachment was scrubbed... URL: <https://www.moypiano.com/ptg/pianotech.php/attachments/20121025/aad6d2b9/attachment-0001.htm> -------------- next part -------------- A non-text attachment was scrubbed... Name: not available Type: image/jpeg Size: 65172 bytes Desc: not available URL: <https://www.moypiano.com/ptg/pianotech.php/attachments/20121025/aad6d2b9/attachment-0001.jpeg>
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