High frequency heating system

Claim 1

IN COMBINATION: A METALLIC ENCLOSURE DEFINING A CAVITY ADAPTED TO RECEIVE A BODY TO BE HEATED; SOURCE MEANS FOR SUPPLYING HIGH FREQUENCY ELECTROMAGNETIC WAVE ENERGY TO THE INTERIOR OF SAID CAVITY; AT LEAST ONE ELECTRIC ELEMENT HAVING A CONDUCTIVE MEMBER EXPOSED TO SAID ELECTORMAGNETIC WAVE ENERGY MOUNTED WITHIN SAID ENCLOSURE; ENERGY SUPPLYING MEANS, EXTERNAL TO SAID ENCLOSURE, FOR SUPPLYING ELECTRIC ENERGY TO SAID CONDUCTIVE MEMBER; AND MEANS, INTERMEDIATE SAID ENERG SUPPLYING MEANS AND SAID CONDUCTIVE MEMBER, FOR PREVENTING ELECTROMAGENERGY SUPPLYING MEANS, EXTERNAL TO SAID ENCLOSURE, FOR ING RADIATED EXTERNALLY OF SAID METALLIC ENCLOSURE BY SAID CONDUCTIVE MEMBER, INCLUDING A TRANSMISSION LINE HAVING A CENTER CONDUCTOR COMPRISING AN EXTENSION OF SAID CONDUCTIVE MEMBER, AN OUTER CONDUCTOR COMPRISING A METALLIC TUBE, MEANS FOR CAPACITIVELY GROUNDING SAID TUBE, SAID MEANS INCLUDING SAID METALLIC ENCLOSURE, A METAL WASHER ADJACENT THERETO, AND INSULATING MEANS BETWEEN SAID ENCLOSURE AND WASHER AND AN INSULATIVE MEDIUM INTERMEDIATE SAID CENTER CONDUCTOR AND SAID OUTER CONDUCTOR, THE LENGTH OF SAID TRANSMISSION LINE BEING SUBSTANTIALLY EQUAL TO AN ODD NUMBER OF ONE-QUATER WAVELENGTHS OF SAID ELECTORMAGNETIC ENERGY AS IT PASSES THROUGH SAID INSULATIVE MEDIUM.