Simplex introduced parallelogram derailleurs in 1960. Huret introduced the Allvit in 1958/9 and Cyclo Benelux (England), the Super 60 in 1960. I think SunTour introduced their first parallelogram derailleur in 1964. Huret, Simplex and Cyclo all continued with plunger type rear derailleurs until 1962 or so. The next issue of V-CC's The Boneshaker contains a seminal article on Cyclo England and its derailleurs, not written by me, I wish to add. It looks like its running to 24 pages. Another good reason for joining the V-CC...
Hilary Stone, Bristol, England
Jerry Moos wrote:
> Speaking of "plunger" type RD's, these seem to have survived well beyond the
> introduction of the Campy parallelogram Grand Sport. What was the first
> Simplex parallelogram RD? What about Huret? Did these companies continue
> making plunger types after introducing parallelogram models? Cyclo (Benelux)
> seems to have continued with a plunger type well into the 60's, maybe even
> into the very early 70's. Did Cyclo ever produce a parallelogram RD? This
> whole subject would seem worthy of a Design Classics column, or perhaps
> Hilary Stone <firstname.lastname@example.org> wrote:
> This is not really true - the Simplex plunger gears shifted far better than
> the Campagnolo Gran Sport with a quick change with almost no overshifting
> required. This was in large part due to the sprung upper pivot which kept
> the upper pulley close to the freewheel. Other plunger type gears did not
> work as well.
> The Gran Sport was more robust and easier to fit but shifted very poorly
> especially if the difference in size between the chainrings was more than a
> few teeth.
> Hilary Stone, Bristol, England
> Harvey Sachs wrote:
>> So, by and large, it seems fair to conclude that the Campy GS, 1951, was
>> the first successful parallogram rear derailleur from a firm big enough
>> to market it.
>> And it was one heck of a lot better than the plunger units it competed