Tuning Lever Design

[J Patrick Draine]

Dan Levitan gave a technical presentation for the Boston Chapter during a
meeting at NBSS last spring. While playing around with these notions he came
up with a U-shaped lever! More specifically an upside down U, with right
angles (so more like |_____|, only upside down). So as long as one doesn't
introduce a twist one can tune very smoothly with the handle in front of the
stretcher.I didn't try it out, but it was interesting.
Patrick Draine

On Sun, Aug 17, 2008  ? wrote:

>
>
> << Please explain to this beginner why tuning levers are not configured to
>
> pull at a right angle to the pin. It seems to me that the angled design
>
> just creates a lot of unnecessary pin gymnastics. All that's needed for
>
> a right angle twist is a longer socket on the handle. >>
>
> A longer socket makes the pin bend more, for a given vector of effort.
>  Think
> what would happen if you had a 12 inch socket.  It would transfer more of
> the
> twisting motion into bending motion at the pin.
>   The angled head is a compromise that lets us avoid obstructions, (like
> plate struts), while keeping the energy of our efforts as closely directed
> rotationally as possible.
> Regards,
>
>
>
> Ed Foote RPT
-------------- next part --------------
An HTML attachment was scrubbed...
URL: https://www.moypiano.com/ptg/pianotech.php/attachments/20080817/8d42524e/attachment.html