Old Ned wrote:
I see where you're going with the allen key jockey wheel fixing but the mech looks as if it has never been used at all so why should the original bolt be missing? I'd love to know how it came into the customer's possession so I'll have to ask Mark at the shop to ask him if he calls in again. From what Mark has said about him I doubt if he would have fitted a replacement.
Here is a copy of the Italian patent Mike found (on Espacenet as it happens!)-
Well, don't I have egg on my face now. I use Espacenet for work almost every week and I did not find the patent. I had tried various potential spellings of the last name of the inventor too. I suppose I made a typo when writing out the name. With these search pages, it is garbage out if you feed garbage in
. Unfortunately the patent has not been fully digitized so it is not possible to read the claims online and see the mosaics. It would be interesting to know precisely what they expected to accomplish with the derailleur. From the description it might be that the same derailleur was meant to be used both as a front and rear derailleur as the word "Cambio" in Italian is generally used to describe a rear mech and "deragliatore" is generally used to describe a front mech. If you do get a copy of the original patent document which is exclusively in Italian, I would be more than happy to give you a quick translation.