Incandescent lamp

Claim 1

A COMPACT, HIGHLY LOADED ELECTRIC INCANDESCENT LAMP COMPRISING A GAS-FILLED GLASS ENVELOPE HAVING A BULBOUS PORTION TERMINATING IN A TUBULAR NECK PORTION CONTAINING A RE-ENTRANT STEM TERMINATING SHORT OF THE JUNCTION BETWEEN SAID BULBOUS AND NECK PORTIONS, A FILAMENT OF RELATIVELY HIGH WATTAGE WITHIN SID BULBOUS PORTION IN RELATIVELY CLOSE RELATION TO SAID NECK PORTION AND NORMALLY CAUSING OVERHEATING OF SAID NECK PORTION AND STEM, A PAIR OF LEAD-IN WIRES CARRIED BY SAID STEM AND EXTENDING DIVERGENTLY THEREFROM INTO SAID BULBOUS PORTION AND CONNECTED TO RESPECTIVE ENDS OF SAID FILAMENT, AND A HEAT PROTECTIVE BAFFLE MEMBER COMPRISING A WAFER OF COMPACTED REFRACTORY VITREOUS FIBERS OVERLYING SAID STEM AT THE JUNCTION OF SAID BULBOUS AND NECK PORTIONS OF THE ENVELOPE AND SUBSTANTIALLY CLOSING OFF SAID NECK PORTION TO DEFLECT THE HOT GAS CURRENTS IN SAID BULBOUS PORTION AWAY FROM SAID FILAMENT TOWARD SAID STEM AND NECK PORTION, AND A METALLIC DISC SUPPORTED BY SAID STEM UNDER SAID WAFER, SAID WAFER BEING CIRCUMFERENTIALLY BENT DOWN AROUND THE PERIPHERY OF SAID DISC AND WEDGED BETWEEN SAID DISC AND SAID NECK PORTION.