Carpentier, Jules Adrien Marie Louis (X 1871 ; 1851-1921)

State manufacturing engineer, he left this situation to apprentice as a metal worker (1876). Engineer at Compagnie P.-L.-M. after ten months, he is assistant to the principal engineer of the material. He bought the Ruhmkorff workshops, on the verge of bankruptcy (1878), and transformed them into a house specializing in high-precision instruments. In 1890, he became passionate about photography; in 1892 he created a photographic camera "the photo-twin". He then entered the field of cinematography and applied for the "Cinégraphe" patent. He produced the first periscopes and cinematographic devices of the Lumière brothers. He was elected a free member of the Académie des sciences (1907) and president of the French Society of photography (Société française de photographie) (1909). He created underwater periscopes, automatic rises for anti-aircraft guns and shell rockets, during the First World War