Rudall Carte and E.A. Couturier Conical-bore Instruments Compared

A comparison of Rudall Carte & Co and E. A. Couturier conical-bore instruments instruments is presented. The principle employed by both Rudall Carte & Co and E. A. Couturier in their conical-bore instruments was to minimize the length of cylindrical tubing. The narrower sections including the leadpipe and the passage through the valves were not all strictly conical, but included steps; the wider parts such as the bell were flared as usual, so the term conical-bore should not be taken literally.