The first ADS or atmospheric diving suit

Two French brothers, Alphonse and Théodore Carmagnolle patented, in 1882, the first design of an atmospheric diving suit or ADS. The helmet featured 25 small glass viewing ports of 51mm/2-inch. The body was articulated with the help of 22 rolling convoluted joints were never completely waterproof. The whole suit weighted 380kg/840lbs. It was build but never put in service.