Microwave electronic tube

Claim 1

A KLYSTRON TYPE ELECTRONIC TUBE COMPRISING AN ELECTRON EMITTING SOURCE AND A COLLECTOR SPACED THEREFROM FOR PRODUCING AN ELECTRON BEAM BETWEEN SAID SOURCE AND SAID COLLECTOR, FIRST MEANS DISPOSED IN THE PATH OF SAID BEAM FOR GENERATING OSCILLATIONS INCLUDING A PAIR OF GAPS DISPOSED AT SPACED POINTS ALONG SAID BEAM, SAID FIRST MEANS INCLUDING A CAVITY RESONATOR BODY OF GENERALLY ANNULAR SHAPE IN WHICH SAID GAPS ARE FORMED BETWEEN PORTIONS OF SAID RESONATOR BODY AND A DRIFT TUBE LOCATED ENTIRELY WITHIN SAID BODY, SAID DRIFT TUBE ALSO BEING ELECTRICALLY CONNECTED TO SAID BODY, SECOND MEANS DISPOSED IN THE PATH OF SAID BEAM BETWEEN SAID FIRST MEANS AND SAID COLLECTOR FOR DEVELOPING OUTPUT POWER FROM SAID BEAM, SAID SECOND MEANS BEING ELECTRICALLY INDEPENDENT OF SAID FIRST MEANS, A CONTROL ELECTRODE DISPOSED IN THE PATH OF SAID BEAM FOR MAINTAINING THE BEAM CURRENT SUBSTANTIALLY CONSTANT, AND MEANS FOR CONNECTING A SOURCE OF MODULATING POTENTIAL ACROSS SAID FIRST MEANS AND SAID SECOND MEANS WHEREBY ELECTRONIC TUNING IS EFFECTED BY VARYING THE TRANSIT ANGLE BETWEEN SAID GAPS.