[pianotech] [Files] Bell upright piano. ("The iron Giant" !)

Bruce Browning - The Piano Tuner justpianos at our.net.au
Mon Sep 14 16:53:17 MDT 2009


tom,
The cord is attached to the hammer butt, coming out just below the butt
cushion.
The spring is attached to the lower part of the jack.
Thus the spring, which is under a small amount of tension at rest, has the
top  end pulled towards the jack as the hammer butt lifts. The tension is
increased more as the jack is tripped from under the notch.
Bruce Browning
The Piano Tuner.


> So what does the cord anchor to? I assume the spring anchor to the jack
> somewhere, and the cord somehow ties it to the hammer butt?
>
> I'll take a better look as soon as possible, but perhaps Marc could best
> answer for now. It seems to locate on the hammer flange but I'll need to
> remove some parts for more detail.




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