Thanks Paul and the mechanic probably made the JT relationship at Peter's site. Joseph Thonon, Jules Thonon, maybe another J. Thonon would also be in the running. Jean Thonnard may have contributed some effort but just from the Jno. Hy. Andrew & Co. LTD Toledo Steel Works Sheffield tubes, it would seem that Fernand Thonon had a close association with the Jno. Hy. Andrew & Co. LTD Toledo Steel Works Sheffield tube source or he may have been the outlet.

French patent #255210 issuing protection for Société Verney-Carron frères for a 4 point lockup may be the origins of Société Verney-Carron frères' platform. It was issued in April 1896 and ran for 15 years.

Then the toplever stop aspect looks to have origins in 1924, although it could have been earlier:


Société Verney-Carron frères Helice - Nr. 577296 of 1924

Kind Regards,

Raimey
rse