Lucien Juy
Male, Person
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Who is Lucien Juy?
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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"Lucien Juy." Biographies.net. STANDS4 LLC, 2024. Web. 9 Jun 2024. <https://www.biographies.net/people/en/lucien_juy>.
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