2009/6/17 Steve Whitting <ciocc_cat@yahoo.com>:
> And to think . . . this was a product of "intelligent design"!
>
> So it used a dual (push-pull) cable system? Very interrrrrresting . . .
>
One wire it looks like to communicate both compressive and tension motions. They actually got the basic concept right of putting the detents on the derailleur side right and having the shifter just tell the derialleur move the jockey wheel x number of detents. The way indexing was eventually done never made any sense to me, but to do it with the detents at the back where I think they always should have will require either two cables or less preferably one held in tension by a spring. Not the way it's apparently done here. But putting the detents near the cogs instead of trying to communicate them accurately through a thin braided cable running through feet of housing was apparently the only thing Simplex got right here.
Kurt Sperry
Bellingham, Washington
USA