Big buttons

[Isaac OLEG]

And , for fun, a friend of mine have gone in the process of building a
piano with 2 bridges, one on each side of the soundboard, one to play
music, the other to keep the board under tension (with strings of
course).

The project turned bad before the end because of realisation defects,
it was supposed to have a maximum tone output (and a double vertical
can be made like that with a keyboard/action on every side.

I'll look for sketches.

Isaac OLEG

Entretien et reparation de pianos.

PianoTech
17 rue de Choisy
94400 VITRY sur SEINE
FRANCE
tel : 033 01 47 18 06 98
fax : 033 01 47 18 06 90
cell: 06 60 42 58 77

> -----Message d'origine-----
> De : pianotech-bounces@ptg.org
> [mailto:pianotech-bounces@ptg.org]De la
> part de gordon stelter
> Envoye : samedi 8 mars 2003 16:31
> A : Pianotech
> Objet : Big buttons
>
>
> A little more stability, I guess. But to make it
> really stable the "button" would need to be wider than
> the bridge on the other side.
>      Just a thought in response to Isaac's comment,
> that's all.
>      T
> --- Delwin D Fandrich <pianobuilders@olynet.com>
> wrote:
> >
> > ----- Original Message -----
> > From: "gordon stelter" <lclgcnp@yahoo.com>
> > To: <oleg-i@wanadoo.fr>; "Pianotech"
> > <pianotech@ptg.org>
> > Sent: March 08, 2003 6:01 AM
> > Subject: Dowelling bridges to board.
> >
> >
> > > It seems to me that if keeping the bridge from
> > > "pulling over" was desired, a dowel through the
> > > bridge, board, and into a big, fat, wooden button,
> > > perhaps 3/4" tall and at least in dameter as the
> > > bridge is wide, would work best. But would this
> > > perceptibly augment notes in the vicinity of the
> > > assembly?
> > >      Just some thoughts.
> >
> >
> > The problem with this theory lies in expecting a
> > spruce panel approximately
> > 8 or 9 mm thick in cross-grain to stabilize a hard
> > maple bridge
> > approximately 32 mm wide and anywhere from 30 to 36
> > mm high. Much higher in
> > the bass.
> >
> > What are these dowels and buttons going to
> > accomplish that the glue joint
> > between the bridge and soundboard surface is unable
> > to accomplish?
> >
> > Del
> >
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