Magnetron having concentric annular tunable resonator utilizing axial plunger and vacuum sealing bellows mounted inside principal envelope wall

Claim 1

A COAXIAL MAGNETRON COMPRISING A CENTRALLY DISPOSED CATHODE, A CYLINDRICAL ANODE INCLUDING A PLURALITY OF ANODE RESONATORS CIRCULARLY POSITIONED ABOUT SAID CATHODE, A CYLINDRICAL WALL CONCENTRIC WITH AND SPACED FROM SAID CYLINDRICAL ANODE, SAID CYLINDRICAL WALL AND SAID ANODE DEFINING AN OUTER CAVITY RESONATOR OF SUBSTANTIALLY ANNULAR CROSS-SECTION, AN ANNULAR MEMBER OF ELECTRICALLY CONDUCTIVE MATERIAL DISPOSED AND AXIALLY MOVABLE WITHIN SAID OUTER CAVITY RESONATOR, END PLATE MEANS VACUUM SEALED TO SAID CYLINDRICAL WALL, OPERATING MEANS EXTENDING THROUGH SAID END PLATE MEANS AND CONNECTED IN AN OPERATIVE RELATIONSHIP WITH SAID ANNULAR MEMBER TO EFFECT SAID AXIAL MOVEMENT THEREOF, AND HOLLOW MEANS COMPRISING A FIRST RING-SHAPED MEMBER OF LOSSY MATERIAL EXTENDING BETWEEN AND VACUUM SEALED TO THE OUTER PERIPHERY OF SAID ANNULAR MEMBER AND SAID END PLATE MEANS AND A SECOND RING-SHAPED MEMBER OF LOSSY MATERIAL EXTENDING BETWEEN AND VACUUM SEALED TO THE INNER PERIPHERY OF SAID ANNULAR MEMBER AND SAID END PLATE MEANS, SAID OPERATING MEANS CONNECTED TO SAID ANNULAR MEMBER BETWEEN SAID FIRST AND SECOND RING-SHAPED MEMBERS.