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Subject:
From:
Alain Anselm <[log in to unmask]>
Reply To:
Harpsichords and Related Topics <[log in to unmask]>
Date:
Sun, 23 Oct 2016 22:15:06 +0200
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This device is very simple: When you push the lower keyboard, the foot of the dogleg rests on a small block glued on the lower keyboard, and escapes this block when pulling the lower keyboard;
the system can also work on the other way, that is to say engage the dogleg pulling the lower keyboard, in this case  the jacks of 8 'and 4' of the lower keyboard are resting on a block glued on the lower keyboard.
However for easy movement of the lower keyboard, it is better that the upper keyboard is not based directly on the frame of the lower keyboard. We can do the upper keyboard like a drawer, based on both sides in a groove made in the wrestplank support blocks, or with a groove on each side of the upper frame, and a small slide block glued on the internal face of the wrestplank blocks, as  Claude Labrèche do in the late 17th (but without coupler). 
images to download from the following link :
Disponible jusqu'à 
30 octobre 2016
Lien de téléchargement 
https://we.tl/4UB8rHyLET
Musically
Alain



Le 23 oct. 2016 à 19:39, Kelzenberg, David C a écrit :

> Alain wrote:
> 
>>>> It is very easy to have a dogleg without this disadvantage, if the lower manual is mobile, you can have dogleg benefits without any disadvantage, and you have a lighter action with two 8' or two 8' and 4'.
> 
> I believe Keith Hill has built several instruments that work this way.  However I'm not sure how the mechanism functions.  Can you explain how the movable lower manual disengages the front 8 dogleg jacks?
> 
> dk
> 
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::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::
Note:  opinions  expressed on HPSCHD-L are those of the  individual con-
tributors and not necessarily  those of the list owners  nor of the Uni-
versity of Iowa.  For a brief  summary of list  commands, send mail to
[log in to unmask]  saying  HELP .
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