This patent is for the swing adjustment screw used by Cyclo on the Cyclo Benelux Mark 7, Cyclo Benelux Mark 8 Tourist and Cyclo Benelux Mark 12. It’s one of the earlier manifestations (at least that I can think of) of a humble screw that remains important to the functioning of many modern derailleurs.

• Publisher: UK Intellectual Property Office
• Inventor: Arthur Rowland Everill
• Country: UK
• Date: UK application filed October 1955
• Derailleur brands: Cyclo Gear Company
• Derailleurs: Cyclo Benelux Mark 7, Cyclo Benelux Mark 8 Tourist, Cyclo Benelux Mark 12