DISRAELI DOCUMENTS

French Patent # 439,224 - Chemineau

French Patent 439,224 - Le Chemineau main image

This is one of the patents that established the derailleur world as we know it. Joanny Panel’s Le Chemineau was arguably the most influential design of the derailleur’s first three decades. More than this, its chainstay mounting, sliding rod, twin pulley wheels and pulley cage pivot concentric with the guide pulley established a pattern that many designers would follow until the start of the 1960s.

The co-inventor is listed as Claudius Bouiller. I think this should be Claudius Bouillier.


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Le Chemineau (1st style) thumbnail
Le Chemineau (2nd style) thumbnail
Le Chemineau (3rd style) thumbnail


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