UK Patent # 576,947 - Cyclo Gear Company

UK Patent 576,947 - Cyclo prototype main image

This patent appears to be mainly concerned with a small protuberance sticking out of the pulley cage, labelled 22, 23 and 24 in the diagrams, that is designed to ensure that the chain is properly guided by the guide pulley. I don’t think this feature ever made it onto a production model.

Browse associated derailleurs.

Cyclo Standard derailleur thumbnail