Jerry Moos wrote:
>
> (cut) One must remember that copying successful designs was
> occuring long before the 70's. Perhaps Campy "copied" the Simplex or other
> successful parallelogram derailleur designs when Coppis Giro and Tour
> victories in the late 40's or early 50's using Simplex made it clear the
> older Campy lever shifters wouldn't cut it anymore.
I don't think Simplex and Campagnolo rear derailleurs had anything in common till 1961, when Simplex introduced the Juy Export 61, which was a copy of the Campagnolo Gran Sport derailleur introduced in 1951.
Juy Export 61:
http://www.geocities.co.jp/
SLJ 5000 CP:
http://www.geocities.co.jp/
All the Simplex derailleurs that followed till up through the 1980s were clearly based on Campagnolo's design.
Chuck Schmidt South Pasadena, CA
.