springs vs. lead

[William R. Monroe]

Just a guess here David, but I would think you would have to use an awful
lot of lead to get the return rate that you get with springs.  Springs allow
for a graduated resistance, increasing as the pedal is depressed further.
Weighting might also allow the upper assy. (e.g. tray) to loose contact with
the trapwork levers, causing some knocking noise.  Speculation here.  Maybe
not............

Respectfully,
William R. Monroe


----- Original Message ----- 
From: "David Ilvedson" <ilvey@sbcglobal.net>
To: <pianotech@ptg.org>; <caut@ptg.org>
Sent: Tuesday, May 10, 2005 9:15 PM
Subject: springs vs. lead


> We all come across noise from springs in pedals.   Why couldn't we
eliminate the spring and use key leads inserted into, for instance the
damper lifter tray, pedal levers...places where springs are used to return
parts...?
>
> David Ilvedson
>
>
>
>
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