This patent is one of several, taken out by different brands, for clever devices to allow derailleur systems to be used with back-pedal brakes.

Why on earth do people like back-pedal brakes? Is it a Dutch thing? Does it go with a lifelong love of infinite horizons, frozen canals and flavour-lite rubbery cheese?

• Publisher: L’Institut national de la propriété industrielle
• Inventor: Lucien Charles Hippolyte Juy
• Country: France
• Date: Priority date October 1963
• Derailleur brands: Simplex
• Derailleurs: none