DISRAELI DOCUMENTS

French Patent # 778,474

French Patent 778,474 - Super Simplex main image

This patent is for the design of Simplex’s initial fork derailleur - the Super Simplex. One crucial feature of this design is that it uses a parallelogram to move the fork in a controlled way - leading some to (justifiably in my opinion) claim that this is the first parallelogram derailleur.


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