Here the Shimano Archery-W is shown running an 1/8” chain over a three speed freewheel.

• Publisher: US Patent and Trademark Office
• Inventor: Satoshi Tarutani, Masashi Nagano and Kikunori Nagada, assigned to Shimano
• Country: USA
• Date: US application filed December 1967, Japanese application filed December 1966
• Derailleur brands: Shimano
• Derailleurs: Shimano Archery-W