SUGAR DISCHARGER INVENTED 19 04 19 08 LAP LOCK SCREENS CREATED 19 10 JOINT CONTRACT Joint Contract with Stearns and Rogers Company and American Tool and Machine Company to manufacture for the Sugar Discharger Centrifugal Company and market the Roberts-Gibson Dischargers. SUGAR WASHER SPRAYERS INVENTED 19 11 1914 1915 19 16 SIMPLEX CENTRIFUGE W/ DISCHARGER INVENTED Self Discharging Sugar Centrifugal Patent filed by Roberts and Gibson on January 22, 1915 Improved Dischargers and Plantation Gate Valve Developed 1908 Sugar Discharger Centrifugal Company Incorporated 252