Emile Gagnan
French engineer. Co-inventor (together with Jacques Cousteau) of the demand-valve used for the first Scuba equipment ("Aqua-Lung")in 1943. The demand-valve was designed for regulating gas in gas-generator engines, but was found to be excellent for regulating air-supply under variating pressure conditions.- born November 1900
Links
- history (http://www.auas-nogi.org/gagnan.htm )