Sohmer

[Erwinspiano@AOL.COM]

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In a message dated 3/22/2002 10:39:01 PM Pacific Standard Time, 
hufford1@airmail.net writes:


> Subj:Re: Sohmer 
> Date:3/22/2002 10:39:01 PM Pacific Standard Time
> From:<A HREF="mailto:hufford1@airmail.net">hufford1@airmail.net</A>
> Reply-to:<A HREF="mailto:pianotech@ptg.org">pianotech@ptg.org</A>
> To:<A HREF="mailto:pianotech@ptg.org">pianotech@ptg.org</A>
> Sent from the Internet 
> 
>              Robin

              Eventually when you see the piano again this would be a 
question worth having the answer to yes? I'll check the date of the one I 
worked on and get back to you if memory serves (yeah right) probably  it's in 
the 1930 as well'
>>>>>>>>>>>>>>>Dale >>>>>>>>>>>>

> 
> Dale,
>      I looked again at this piano today.  The strings cross over, of
> course, the board and reach the agraffe which they pass through, THEN,
> the string proceeds upward at an angle of, approximately,  about 5 - 6
> degrees for about 1/4 to 3/8 inch and then turns over a round to the top
> of the bridge which is about 5/8 of an inch across.  As it passes across
> the top of the bridge it rises at an angle of less than 1 degree.  After
> leaving the bridge the angle reverses and it inclines at about 1 degree
> (I am not sure as I write this from memory some twelve hours later)
> downward to the string rest and hitch pin.
>       With a little trig this could be calculated but I am reasonably
> sure that a force couple exists here which has the effect of rotating
> the bridge backward thus the shearing stess in the board which, I think,
> the crack is evidence of.  Also, in point of fact, it is about two
> inches or so from the bridge.  As I repaired the crack over a year ago
> and sent the piano to a refinished for some months I must rely on memory
> for its characteristics but I think the side closest to the bridge was
> the high side.  In fact, I feel reasonably certain this was the case
> but, again, I am relying on a very unreliable item, my memory.
>      Incidentally, this piano, which is from about 1930, does not have
> the agraffe system in the top section or the bass.  Conventional pining
> is used instead.
> Regards, Robin Hufford
> 
> Erwinspiano@AOL.COM wrote:
> 


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