False beat Suppression (was: PitchLock)(Modified by Kent Swafford)

[Joe And Penny Goss]

Hi Jon,
Perhaps a bugger to repair but would do the trick if the cause were the
loose pin.
How about a simple m or n pin to hold the tri or bi cord?
The Hallett and Davis that I restrung this year had agraffs on all contact
points.
Joe Goss
imatunr@srvinet.com
www.mothergoosetools.com
----- Original Message ----- 
From: "Jon Page" <jonpage@comcast.net>
To: <pianotech@ptg.org>
Sent: Sunday, December 28, 2003 8:59 AM
Subject: False beat Suppression (was: PitchLock)(Modified by Kent Swafford)


> To follow up on this topic, I thought I'd impart my latest idea on
> false beat suppression
> by means of Bridge Pin Coupling (BPC).
>
> First, though, a quick briefing on my other BPC of ideas...
>
> Initially I thought of clamping mechanisms such as binder clips in
> various forms and sizes
> but their fabrication would probably be cost prohibitive. Then
> something a little more
> mechanically sophisticated, similar to a brass rail repair clip made of
> brass or HMDP.
> I have not attempted either application.
>
> Next came a wedging execution where an inverted trapezoidal HMDP
> fabrication would fit
> between the front and rear bridge pins and be secured with screws to
> the bridge whereby
> applying pressure on the pins to reduce their wavering. Again, no
> prototypes.
>
> Somewhere in there was a fine wire gauge screw that would install
> relatively close to the pin
> so that once screwed into the bridge, the head would bind against the
> pin thereby reinforcing.
>
> This morning an idea of using music wire woven through a unison's
> bridge pins came
> into mind while pondering the PitchLock application. The wire segment
> would need to
> have a bend so as not to apply too much tension which might cause other
> problems
> with the pins. The segment might also be bent to wrap around the end
> pins to some degree.
>
> While considering the effort needed to place the bends in close
> proximity to each other
> I thought that a metal softer than music wire could be used and
> non-round while we're at it. . .
> brb. . . so I just made a few prototypes and attached a jpg.
>
> It is a non-working example because this piano is in the re-whatevering
> process. So, I'd like
> to 'open-source' this since I don't have false beats around for
> experimentation. There might be
> a more suitable metal to use than a construction staple as well. Long
> term trials are needed
> to see if it vibrates loose... I hate it when that happens.
>
> Has anyone already tried this?
>
>
> Regards,
>
> Jon Page, piano technician
> Harwich Port, Cape Cod, Mass.
> mailto:jonpage@comcast.net
>
>
>


----------------------------------------------------------------------------
----






----------------------------------------------------------------------------
----


> _______________________________________________
> pianotech list info: https://www.moypiano.com/resources/#archives
>