Electric radiant heating device for localized heating of objects and substances

Claim 1

An electric burner comprising: an ellipsoidal reflector having an inner focus and an outer focus with both focus points on the major axis of the ellipsoidal reflector; an elongate filament mounted within the ellipsoidal reflector with an inner end substantially at the inner focus point and extending outwardly along the major axis of the ellipsoidal reflector; support means mounting said elongate filament in said ellipsoidal reflector; and power supply connective means connected to said elongate filament for the feeding of electric power to and through said elongate filament; wherein said ellipsoidal reflector terminates in an annular rim; and said elongate filament is short enough that the outer end of said filament is in said ellipsoidal reflector within and spaced from the plane of said annular rim; said elongate filament is a filament coil long along its axis relative to its transverse thickness with its inner end and outer end mounted from said ellipsoidal reflector so that the coil's axis is substantially coexistent through the length of said filament coil with said major axis of the ellipsoidal reflector such that an inverted image of the filament is projected to extend inwardly along said major axis from said outer focus point; and wherein said filament coil has two support leads connected to the inner coil end and outer coil end with stiff conductive pillars mounted in a thickened support of said ellipsoidal reflector adjacent the apex thereof as the mounting support of said filament coil; and two leads connected to said two support leads connectable to a power supply as said power supply connective means.