Laws of physics in reverse?

[piano2ba1 at att.net]

Arlie, I'm speculating that either: 
(1)The vertical angle of the trapwork's lift rod is becoming more perpendicular to the damper lift rod due to a "walking" or swiveling action of the trapwork lever increasing push to the damper lift rod, or for some other reason. Or:
(2)There has been a change in the distance of the bottom board in relation to the damper lift rod for some inexplicable reason. Or:
(3)The guide for the trapwork's rod to the damper lift rod may have been shifting making the place where the top of the trapwork's lift rod contacting the damper lift rod change to a different spot, increasing push to the damper lift rod. Or:
(4)The piano is coming apart. Or you may:
(5)Fuggedaboudit!

Gary Bauchman RPT
NYC Chapter

-------------- Original message from Arlie Rauch <adarpub at midrivers.com>: -------------- 


> 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 
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