Device for generating high frequency pulses having a predetermined frequency by means of a continuously tunable magnetron

Claim 1

IN A SYSTEM FOR TRANSMITTING PULSES OF HIGH FREQUENCY ENERGY OF PREDETERMINED FREQUENCY, SAID SYSTEM COMPRISING A MAGNETRON HAVING A TUNABLE CIRCUIT, A SOURCE OF A PULSATORY EXCITATION SIGNAL CONNECTED TO SAID MAGNETRON, MEANS FOR CONTINUOUSLY VARING THE TUNING OF SAID TUNABLE CIRCUIT, WHEREBY SAID MAGNETRON IS EXCITED AT EACH OCCURRENCE OF A PULSE OF SAID EXCITATION SIGNAL TO TRANSMIT A PULSE OF HIGH FREQUENCY ENERGY OF A FREQUENCY DETERMINED BY THE TUNING OF SAID TUNABLE CIRCUIT AT THE INSTANT OF EXCITATION, AN AUXILIARY OSCILLATOR, AND CONTROL MEANS CONNECTED TO SAID AUXILIARY OSCILLATOR FOR CONTROLLING THE FREQUENCY OF SAID OSCILLATIONS TO FOLLOW THE TUNING FREQUENCY OF SAID TUNABLE CIRCUIT AT LEAST FOR AN INTERVAL OF TIME IMMEDIATE PRECEDING EACH EXCITATION OF SAID MAGNETRON BY SAID EXCITATION SIGNAL; THE IMPROVEMENT WHEREIN SAID SOURCE OF A PULSATORY EXCITATION SIGNAL COMPRISES MEANS INCLUDING A PULSE GENERATING DEVICE, MEANS APPLYING AN ELECTRICAL QUANTITY CORRESPONDING TO THE INSTANTANEOUS OSCILLATOR FREQUENCY TO SAID SOURCE, AND MEANS CONNECTED TO SAID PULSE GENERATING DEVICE AND RESPONSIVE TO THE OCCURRENCE OF A PREDETERMINED VALUE OF SAID ELECTRICAL QUANTITY FOR ENERGIZING SAID PULSE GENERATING DEVICE TO GENERATE A PULSE FOR ENERGIZING SAID MAGNETRON.