Condenser unit for a magnetron capable of preventing the leakage of microwave energy

A magnetron assembly, operable with an electric power source, said magnetron assembly comprising:

• a housing, a cathode having a filament for emitting thermions, an anode vane assembly having an anode and a plurality of cavities disposed therein to which said thermions from said filament are directed, a permanent magnet mounted to said housing to rotate and accelerate said thermions between said anode and cathode such that said thermions interact with said cavities to generate electromagnetic wave energy at a high frequency, a radiating antenna mounted to and extending from said housing for radiating said high-frequency electromagnetic wave energy from said magnetron, a plurality of radiant tubes mounted to said housing to radiate heat from said anode vane assembly in order to cool said anode vane assembly, a lead connected between said filament and said power source so as to direct electric power from said power source to said filament, upper and lower filter boxes joined to one another and connected to said housing, and a condensor unit mounted to penetrate said upper filter box, said condenser unit comprises:
• a condenser comprising a terminal connected to said lead to receive electrical power;
• and
• a mounting plate defining a plane and fixedly mounting said condenser to said upper filter box, said mounting plate having a periphery and an elastic periphery member mounted to said periphery to extend outwardly therefrom, said elastic periphery member extending in a direction that is inclined at an angle with respect to said plane of said mounting plate, said elastic periphery member comprising a plurality of slender pieces separated by slits and completely elastically covering a gap between said mounting plate of said condenser unit and said upper filter box, said elastic periphery member and each said slit having a predetermined height and a predetermined width.