Key pins and key bushings

[Jon Page]

---------------------- multipart/alternative attachment
At 10:06 AM 5/27/99 -0400, you wrote:
>List:
>
>Let us get something curved here (as opposed to straight).
>
>Front key pins are oval, almost.  The two sides have a constant radii
>which means that, within certain limits, the interface area between
>the radii of both sides and a bushing remains constant, but relocated
>fore and aft.  
>
>This means that the contact surface will remain constant irrespective
>of the angle of the pin until the termination of the side radii.
>
>It is an old wives tale promulgated by lack of fore thought and
>undelineated parameters.
>
>Like any technical solution there are appropriate and inappropriate
>application approaches.
>
>In simpler words: You can turn key pins with no ill effect if done so
>thoughtfully and carefully.  We are technicians, be an intelligent
>one.
>
>               Newton
>

Didn't Barrie find this as one of Erard's patents for the purpose of
taking up slack?

Me thinks 'tis true

Jon Page,  Harwich Port,  Cape Cod,  Mass.  mailto:jpage@capecod.net
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

---------------------- multipart/alternative attachment
An HTML attachment was scrubbed...
URL: https://www.moypiano.com/ptg/pianotech.php/attachments/a8/51/91/a4/attachment.htm

---------------------- multipart/alternative attachment--