Sostenuto Pedal Photos From Baldwin Upright

Horace Greeley hgreeley at stanford.edu
Mon Jun 19 13:46:26 MDT 2006


Hi, Patrick,

At 11:37 AM 6/19/2006, you wrote:
>Horace: Thanks for the reply.

Most welcome.  I do enjoy a good puzzle.

>There is no evidence of mounting setup on the bottom board.

Shoot.

>  The pivot for the pedal is in the rear. Apparently the pedal is 
> meant to pull down on a lever that in turn pulls down the treble 
> end of the horizontal lever, causing the bass end of the lever to 
> lift the push rod which rotates the sostenuto tab rod.

Yes.  Also, it appears as if there is some graphite on the end of the 
horizontal lever, as well as an added piece of a darker 
hardwood.  Does it look like whatever was screwed onto the lever was 
attached to the top or the bottom?  And,  looking at the cutout on 
the bottom of the lever, is there any evidence of something either 
having been attached and/or touching at some point along the length 
of the cutout?  If the spring on the vertical piece is to hold that 
piece in place (relatively), then there needs to be some spring 
and/or lever device in the rest of the mechanism to keep the 
sostenuto from becoming engaged without the pedal.  Since there does 
not appear to be a spring on the pedal itself, if there is no other 
spring farther along the train, it must be between the pedal and the 
right end of that horizontal lever.

Sorry...open rumination...so many of these instruments had truly 
wonderful and inventive ways to deal with different problems...

>A real Rube Goldberg device!

Oh, yes!!!

Best.

Horace
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