On Sat, 03 May 2008 06:58:34 -0700, Larry Jaques
wrote:



The harmonium is a beautiful and impressive piece of work. But I
wonder how many unnecessary gears and shafts there are in there. I say
that after noticing that the cone gear train is all the same tooth
size/pitch, so all rows of teeth engage simultaneously. Hmmm...
http://www.tatjavanvark.nl/tvva/harm3_12_s.jpg

There must be some sort of clutch to select which pair of gears is
active, otherwise the shafts would be locked. You can't have both a
1:2 and 2:1 ratio, for example, between two shafts simultaneously.

--
Ned Simmons