Radio detection and automatic tracking equipment

Claim 1

A PULSE RADIO DETECTION AND AUTOMATIC TRACKING EQUIPMENT COMPRISING A TRANSMITTER FOR TRANSMITTING CARRIER WAVE PULSES IN A PERIODIC SUCCESSION, SAID PULSES BEING FREQUENCY MODULATED IN THE POSITIVE SENSE THROUGHOUT THE DURATION OF EACH PULSE FOR ALTERNATE PULSES AND IN THE NEGATIVE SENSE THROUGHOUT THE DURATION OF EACH INTERVENING PULSE, A RECEIVER FOR RECEIVING ECHO PULSERS RETURNED FROM DISTANT OBJECTS AND HAVING TWO RECEIVING CHANNELS, EACH CHANNEL INCLUDING A MIXER FOR COMBINING RECEIVED ECHO PULSE WITH LOCALLY GENERATED PULSES TO GENERATE INTERMEDIATE FREQUENCY ECHO PULSES, MEANS RENDERING SAID RECEIVING CHANNELS ALTERNATELY OPLERATIVE SO THAT ONE CHANNEL RECEIVES ECHO PULSES FROM ALTERNATE TRANSMITTED PULSES AND THE OTHER RECEIVING CHANNEL RECEIVES ECHO PULSES FROM THE INTERVENING TRANSMITTED PULSES, AND A FREQUENCY-SENSITIVE DELAY LINE CONNECTED TO THE OUTPUT OF SAID RECEIVING CHANNELS FOR TRANSMITTING SAID INTERMEDIATE FREQUENCY ECHO PULSERS ALONG SAID LINE AT DIFFERENT VELOCITIES DETERMINED BY THE RESPECTIVE FREQUENCIES OF THE INTERMEDIATE FREQUENCY ECHO PULSES, WHEREBY SAID INTERMEDIATE FREQUENCY ECHO PULSES ARE DELIVERED AT THE OUTPUT OF SAID DELAY LINE IN TIME SPACED POSITIONS DETERMINED BY THE FREQUENCIES OF SAID INTERMEDIATE FREQUENCY ECHO PULSES.