String termination devices

[Delwin D Fandrich]

----- Original Message -----
From: "Phillip L Ford" <fordpiano@lycos.com>
To: <pianotech@ptg.org>
Sent: November 11, 2001 4:07 PM
Subject: Re: String termination devices


> I had an idea similar to this, but the central portion of the
> device was like an agraffe, an upright piece with holes
> through it. The string passes over a bearing area, as with
> your device, deflects down and through the hole in the
> 'agraffe' and back up over the second bearing area. I had
> thought of screwing it into the bridge. The problems are
> that the holes would be difficult to put in by machining,
> although with casting or powder metal process would be OK,
> and that screwing them in gives you some alignment problems,
> just like with agraffes on the plate.

The biggest problem would be stringing the things. You would have to thread
the string through the hole and then pull the entire speaking length
through.


>
> Your device addresses
> these problems.  I do also worry that the separate 'bearing
> rod' held in place by string pressure (if I understand your
> sketch correctly) might buzz.

I wasn't able to do enough experimental work and/or testing to determine
this. I heard no hint of buzzing on the Stuart piano.

Del