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Lucien Juy

Lucien Juy French Designer

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Lucien Juy is a French Designer.

Lucien Juy is a member of the following lists: French inventors, French industrial designers and Cycle manufacturers of France.

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Nationality French
Occupation Designer

Lucien Charles Hippolyte Juy was a French industrialist who made derailleur gears. He is credited with making the first derailleur with a collapsible parallelogram. A hinged frame swung in and out from the frame and fed the chain to one of a number of sprockets attached to the hub. Juy's derailleurs, sold as Simplex derailleurs, were novel in having a jockey wheel to correct the tension of the chain as it moved across differently sized sprockets.

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