string termination

[Pierre Gevaert]

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Encountered this type of agraffes in pianos  as old as 1840

Pierre Gevaert=20
----- Original Message -----=20
From: "David Love" <davidlovepianos@comcast.net>
To: "'Pianotech'" <pianotech@ptg.org>
Sent: Sunday, August 14, 2005 6:28 PM
Subject: RE: string termination


> Seems like I have agraffes that have a metal rod insert.  A hole is =
drilled
> through the agraffe such that when the metal rod is inserted it is =
only
> slightly exposed at the top of each hole.  That puts the string =
termination
> in contact with the hardened metal rod rather than the brass. =20
>=20
> David Love
> davidlovepianos@comcast.net=20
>=20
> -----Original Message-----
> From: pianotech-bounces@ptg.org [mailto:pianotech-bounces@ptg.org] On =
Behalf
> Of Ron Nossaman
> Sent: Sunday, August 14, 2005 8:54 AM
> To: Pianotech
> Subject: Re: string termination
>=20
> > Why then not make a agraffe out of steel or some other harder =
material?=20
> > That may be difficult for the one-off small-shop piano builder, but =
if=20
> > there were a demand to others..... Why would this be so difficult? =
Why=20
> > would brass persist so long?
>=20
> Cost? Ease of machining?
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>=20
> > Why not use other termination types like a capo-type bar in all =
string=20
> > sections like you see on cheap old American microgrands? What about=20
> > something more like an upright pressure bar arrangement?
>=20
> Actually, it looks to me to be quite possible to retrofit an=20
> agraffed piano with a termination bar of harder material than the=20
> brass agraffe, along the agraffe line, with a pressure bar behind,=20
> screwed into the plate. A cast stepped bar would be ideal for=20
> matching speaking lengths within the unison, but I'm curious how=20
> well a curved bar would work. Just how critical are slightly=20
> mismatched speaking lengths within unisons at those string lengths?=20
> I'd guess there is some tolerance.
>=20
> Ron N
> _______________________________________________
> pianotech list info: https://www.moypiano.com/resources/#archives
>=20
>=20
> _______________________________________________
> pianotech list info: https://www.moypiano.com/resources/#archives
> 
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