Laws of physics in reverse?

[Joe And Penny Goss]

Hi Arlie,
Either loosening or tightening is possible without some type of locking
method.
Methods I've have seen or used:
Slot in the wood to capture square nut
lock nut or jam nut
felt punching under adjusting nut
leather nut
Punching under pedal ( necessary for noise reduction and also helps to keep
the setting )
CA on the nut, just a drop will do yah.
Joe Goss RPT
Mother Goose Tools
imatunr at srvinet.com
www.mothergoosetools.com
----- Original Message ----- 
From: "Arlie Rauch" <adarpub at midrivers.com>
To: <pianotech at ptg.org>
Sent: Saturday, March 25, 2006 4:35 PM
Subject: Laws of physics in reverse?


> A customer called me the other day who has an old upright piano, a
> fairly nice one.  But it has one unusual feature--either that or she
> is not telling me everything.  The nut which adjusts the damper pedal
> tightens itself over time to the degree that the dampers stand off
> from the strings, and the sound just rings.
>
> Is this really possible?  She claims no one tampers with it.  But
> every visit I adjust it so it works properly, and my next visit it is
> screwed down so tight that the dampers are off the strings again.
>
> Anyone else experience this?  Can you explain it?  I can understand a
> nut loosening, but tightening by itself baffles me.
>
> Anyway, it's time to loosen the nut again!
>
> Arlie Rauch
> Glendive, MT