DISRAELI DOCUMENTS

US Patent # 2,598,557 - Simplex

US Patent 2,598,557 - Simplex Tour de France main image

Check out the zany way the chain is supposed to feed through the pulley cage (figure 3).


  • Publisher: US Patent and Trademark Office
  • Inventor: Lucien Juy
  • Country: USA
  • Date: US application filed June 1947, French application filed March 1944
  • Derailleur brands: Simplex
  • Derailleurs: Simplex Champion du Monde 46