[CAUT] stack fit to keyframe

[Fred Sturm]

Hi John,
    Quite right. I should have added ³in current production.² Ron Overs is
the first to point out that Herrberger ³went there first² in regards to
knuckle/jack being on the convergence line. Ron¹s action has several
additional features.
    BTW, I like that felt on the jack tender, rather than on the letoff
button. Prohibitively expensive to make, but a nice feature, IMO.
    Thanks for sharing the illustration.

Regards,
Fred Sturm
University of New Mexico


On 9/12/06 5:28 PM, "John Delacour" <JD at Pianomaker.co.uk> wrote:

> At 3:57 pm -0600 12/9/06, Fred Sturm wrote:
> 
>> The major friction in the action, though, is knuckle to jack/rep top, which
>> is far from the convergence point except in Overs' design.
> 
> Strictly not so.  Here is Herrburger's action from 1898, which was imitated
> with variations but no improvement by one or two other action makers.  Note
> that the two arcs are as near to touching as can be throughout the descent of
> the hammer into check.
> 
> JD
> 
> 
> 
> 
> 


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