Synthesization of crystal-controlled frequencies

Claim 1

IN COMBINATION WITH A MULTICHANNEL CARRIER SIGNAL COMMUNICATION SYSTEM INCLUDING A SOURCE OF RECEIVED COMMUNICATION SIGNALS IN A GIVEN FREQUENCY RANGE ASSOCIATED WITH THE RECEIVER THEREOF, A FREQUENCY SYNTHESIZING SYSTEM COMPRISING A PLURALITY OF CRYSTALS OF DIFFERENT SELECTED FREQUENCY VALUES, A PLURALITY OF OSCILLATORS EACH CONTROLLED BY A SELECTED CRYSTAL IN A DIFFERENT GROUP OF ONE OR MORE OF SAID CONTROL CRYSTALS TO PRODUCE A CONTROL WAVE OF A DIFFERENT FREQUENCY WITHIN A SELECTED DIFFERENT FREQUENCY RANGE, THREE FREQUENCY MIXERS EACH HAVING TWO INPUTS AND ONE OUTPUT, MEANS FOR RESPECTIVELY APPLYING THE CONTROL WAVE OUTPUTS OF CERTAIN ONES OF SAID OSCILLATORS TO DIFFERENT INPUTS OF A FIRST ONE OF SAID MIXERS, MEANS FOR SELECTING ONE OF THE SUM AND DIFFERENCE FREQUENCY COMPONENTS OF THE APPLIED CONTROL FREQUENCIES APPEARING IN THE OUTPUT OF SAID FIRST MIXER, MEANS FOR APPLYING THE RESULTING COMPONENT TO ONE OF THE INPUTS OF A SECOND MIXER AND FOR APPLYING THE CONTROL WAVE OUTPUT OF A THIRD OSCILLATOR TO THE SECOND INPUT THEREOF, FREQUENCY SELECTING MEANS FOR SELECTING ONE OF THE SUM AND DIFFERENCE COMPONENTS OF THE APPLIED CONTROL FREQUENCIES APPEARING IN THE OUTPUT OF SAID SECOND MIXER AND FOR APPLYING THE SELECTED COMPONENT TO ONE INPUT OF A THIRD MIXER, MEANS FOR APPLYING THE RECEIVED SIGNALS WITHIN SAID GIVEN FREQUENCY RANGE FROM SAID SOURCE TO THE SECOND INPUT OF SAID THIRD MIXER TO COMBINE THEREIN WITH THE SELECTED COMPONENT APPLIED TO SAID ONE INPUT THEREOF, MEANS FOR SELECTING AN INTERMEDIATE FREQUENCY COMPONENT APPEARING IN THE OUTPUT OF SAID THIRD MIXER, A SIGNAL TRANSMITTER, A FOURTH OSCILLATOR HAVING AN ASSOCIATED CONTROL CRYSTAL FOR PRODUCING ANOTHER CONTROL WAVE OF CORRESPONDING FREQUENCY, A FOURTH FREQUENCY MIXER HAVING TWO INPUTS AND ONE OUTPUT, MEANS FOR RESPECTIVELY APPLYING THE CONTROL WAVE OUTPUT OF SAID FOURTH OSCILLATOR AND THE SELECTED SUM AND DIFFERENCE FREQUENCY OUTPUT OF SAID SECOND MIXER TO DIFFERENT INPUTS OF SAID FOURTH MIXER TO COMBINE IN THAT MIXER TO PRODUCE IN ITS OUTPUT SUM AN DIFFERENCE COMPONENTS OF THE FREQUENCIES OF THE APPLIED WAVES AND MEANS FOR SELECTIVELY AMPLIFYING THE RESULTING FREQUENCY COMPONENTS AND FOR APPLYING THEM TO SAID SIGNAL TRANSMITTER TO TRANSLATE THE OUTGOING SIGNALS TO THE PROPER FREQUENCIES FOR TRANSMISSION.