Unfortunately there is no image on this registered design - but I believe that it relates to the Simplex Juy Export 61. The description specifies that it relates to a parallelogram derailleur. Note that the date is June 1960, not 1961.

• Publisher: L’Institut national de la propriété industrielle
• Inventor: Lucien Charles Hippolyte Juy
• Country: France
• Date: French application June 1960
• Derailleur brands: Simplex
• Derailleurs: possibly relates to the Simplex Juy Export 61?