Bluthner 1916 Action

[larudee@pacbell.net]

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I think you will find that if you regulate a Bluthner patent action
according to Bluthner specs for blow distance and key dip, the hammers
will be suspended above, not resting upon the rail.  If you try to make
the blow distance equal to the distance of the hammers resting on the
rail, the key dip will be both excessive and progressively greater going
from bass to treble, and the sharps will dip at or below the level of
the naturals.

Paul S. Larudee

Pianosold@AOL.COM wrote:

> Sorry to come in on this late Ola,
>
> Contary to what Paul Larudee said, (sorry Paul) the hammers MUST rest
> on the
> rail.
>
> This is why the hammer rest rail covering is made firm (with a c.1mm
> felt
> cover) so as to not interfere with the jack/notch relationship - as
> per
> upright action.
>
> Hammers at rest above the rail, would surely be resting on the jacks -
> not
> ideal!  The 'L' shaped spring is designed to facilitate hammer drop.
>
> After hammer filing, re-furbish the hammer rest rail so that blow is
> correct
> - then regulate jacks up to the notch, but not pushing on it - as per
> upright
> action.
> '
> I hope you'll agree that you'd need Uri Gella's help to regulate those
> 'one
> legged spiders legs' to a perfect hammer line!!!
>
> As has already been mentioned bass hammers would be perilously close
> to the
> underside of the plank if they were above the rest rail.
>
> Bluthner is happy to field enquiries on their action  -  their tel no
> is 0049
>  342977513  -  there's even a Mr Bluthner to speak to !!
>
> Regards
>
> Rob Thornton

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