very strange tuning mechanism

[John Delacour]

At 05:54 -0400 22/7/08, Tom Servinsky wrote:

>The Mason & Hamlin uprights had a system called the "screw stringer" 
>system will sounds very close to what you are describing. Unusual, 
>but stable system.

Here are some pictures of the Brinsmead screw system on a 6'3" grand, 
which they used for over 25 years concurrently with traditional 
wrestplanks on both grands and uprights.  The expense must have been 
terrific.  Dale Erwin has just restored one of these.  I haven't got 
round to mine yet.





-------------- next part --------------
An HTML attachment was scrubbed...
URL: https://www.moypiano.com/ptg/pianotech.php/attachments/20080722/542c6dc7/attachment-0001.html 
-------------- next part --------------
A non-text attachment was scrubbed...
Name: bmd_screw_3.jpg
Type: image/jpeg
Size: 73496 bytes
Desc: not available
Url : https://www.moypiano.com/ptg/pianotech.php/attachments/20080722/542c6dc7/attachment-0003.jpg 
-------------- next part --------------
A non-text attachment was scrubbed...
Name: bmd_screw_2.jpg
Type: image/jpeg
Size: 54898 bytes
Desc: not available
Url : https://www.moypiano.com/ptg/pianotech.php/attachments/20080722/542c6dc7/attachment-0004.jpg 
-------------- next part --------------
A non-text attachment was scrubbed...
Name: bmd_screw.jpg
Type: image/jpeg
Size: 57307 bytes
Desc: not available
Url : https://www.moypiano.com/ptg/pianotech.php/attachments/20080722/542c6dc7/attachment-0005.jpg