This patent covers a clip for attaching your Charvin Le Lautaret derailleur to the frame. It allows considerable adjustment of the angle of the gear.

• Publisher: L’Institut national de la propriété industrielle
• Inventor: Francis Charvin
• Country: France
• Date: French application May 1931
• Derailleur brands: Charvin
• Derailleurs: Charvin Le Lautaret (1st style)