What is "claudel-hobson"

Claudel-Hobson was a series of British carburettors manufactured by the H. M. Hobson (Aircraft and Motor) Components Ltd..

First introduced in 1908, they were widely used in British car and aircraft engines in the early 20th Century. Applications included Sunbeam automobiles as well as Armstrong-Siddeley, Bristol, de Havilland, and Napier aircraft engines.