FRONT RAIL KEYPIN SHAPE

[Newton Hunt]

The arc plays an extremely negligible part in function here.  What
does is the amount of metal interfacing with felt.  Actually it is
a tightly woven cloth of high density, hopefully.  The cloth
prevents sideways movement, noise and the wide cross section
reduces wear but does increase friction especially if the metal is
not polished and lubricated.

I liked the oval center pins I have seen except that they bend too
easily and I had to go in and relevel the keys too often.

		Newton

Tom Robinson wrote:
> 
> OK Ed and Newton, I'm not sure I understand yet.  Greater bearing
> area......hmmmm....OK then, why not have a larger diameter round pin?
> I'm sure round ones would be easier to manufacture.  What part does the
> felt play in the equation?  Does not the end of the key travel in an
> arc?  Does not the oval shape decrease the angle of attack between the
> felt and the pin, when compared to a  round shape of the same effective
> surface area?  Did I just answer my own question?
> 
> Tom Robinson
> East Tennessee - Looking forward to the next C-3.........OK, I'd even
> take an Acrosonic......just no more spinets made by furniture
> people........please........just for a while......