Carbon dioxide generator

Claim 1

CARBON DIOXIDE GAS GENERATOR COMPRISING AN OPEN-TOP-HOUSING HAVING AN INLET IN ITS SIDE WALL AND AN OUTLET IN THE CENTER OF ITS BOTTOM, A CONDUIT CONNECTED TO SAID INLET FOR SUPPLYING THERETO A STREAM OF AIR, A PAIR OF CONCENTRIC TUBULAR SCREENS MOUNTED ON SAID HOUSING BOTTOM AROUND SAID OUTLET AND SPACED FROM SAID SIDE WALL, A TUBE IN SAID OUTLET PROJECTING UP INTO SAID INNER SCREEN, A BAFFLE IN THE UPPER END OF SAID TUBE, SAID SCREENS BEING SPACED FROM EACH OTHER TO FORM A RECEPTACLE FOR BURNING CARBONACEOUS MATERIAL, A HOPPER MOUNTED ON TOP OF THE HOUSING WITH ITS LOWER END CLOSING THE SPACE BETWEEN THE TOP OF THE OUTER SCREEN AND THE HOUSING, A CLOSURE MEMBER FOR THE UPPER END OF THE INNER SCREEN PROVIDED WITH A SECONDARY INLET, A CONDUIT CONNECTED TO SAID FIRST-MENTIONED CONDUIT AND EXTENDING INTO SAID HOPPER AND CONNECTED TO SAID SECONDARY INLET, AND A VALVE IN SAID LAST-MENTIONED CONDUIT FOR REGULATING THE SUPPLY OF AIR TO SAID SECONDARY INLET.