Apparatus for finding the relation between a missile trajectory and a target

Claim 1

RADAR SCANNING APPARATUS FOR FINDING THE RELATION BETWEEN A MISSILE TRAJECTORY AND A TARGET, COMPRISING, IN COMBINATION, RADAR SCANNING MEANS INCLUDING A MOVABLE RADAR ANTENNA EMITTING A RADAR BEAM, A MAIN RECEIVING CHANNEL CONNECTED WITH SAID ANTENNA FOR RECEIVING ECHO SIGNALS, ANDA SERVO-LOOP DERIVING FROM SAID ECHO SIGNALS ELECTRIC SIGNALS FOR CONTROLLING THE MOVEMENT OF SAID ANTENNA SO AS TO TRACK A TARGET CAUSING SAID ECHO SIGNALS, SAID SEAMING MEANS FURTHER INCLUDING FIRST GATING MEANS PREVENTING RESPONSE TO SAID MAIN RECEIVING CHANNEL TO ECHO SIGNALS CAUSED BY OBJECTS LOCATED AT A DISTANCE FROM SAID ANTENNA DIFFERING SUBSTANTIALLY FROM THE DISTANCE OF PARTICULAR TARGET BEING TRACKED; A FIRST AND A SECOND AUXILIARY RECEIVING CHANNEL CONNECTED IN PARALLEL WITH SAID MAIN RECEIVING CHANNEL, EACH OF SAID AUXILIARY RECEIVING CHANNELS INCLUDING AUXILLIARY GATING MEANS ADJUSTABLE FOR PERMITTING RESPONSE OFTHE RESPECTIVE AUXILIARY RECEIVING CHANNEL ONLY TO ECHO SIGNALS CAUSED BY MOVABLE OBJECTS LOCATED AT SELECTED FIRST AND SECON DISTANCES, RESPECTIVELY, FROM SAID ANTENNA DIFFERING BY GREATER AND LESSER PREDETERMINED AMOUNTS, RESPECTIVELY, FROM THE DISTANCE OF THE TARGET BEING TRACKED; AND INDICATOR MEANS COOPERATING WITH SAID AUXILIARY RECEIVING CHANNELS FOR INDICATING IN RELATION TO SAID RADAR BEAM THE POSITIONAL COORDINATES, RESPECTIVELY, OF A MISSILE PASSING THROUGH SAID RADAR BEAM AT EITHER ONE OF SAID SELECTED FIRST AND SECOND DISTANCES, SAID INDICATOR MEANS COMPRISINGA CATHODE RAY OSCILLOGRAPH HAVING DEFLECTOR MEANS ANDA LONG-AFTERGLOW SCREEN FOR DISPLAYING AT SUBSTANTIALLY THE SAME TIME IN ELEVENTIONAL AND AZIMUTHAL COORDINATES SAID ECHO SIGNALS CAUSED BY A MISSILE WHEN LOCATED AT SAID FIRST AND SECOND SITANCES, RESPECTIVELY, AND CONTROL CIRCUIT MEANS CONNECTING SAID OSCILLOGRAPH WITH SAID FIRST AND SECOND AUXILIARY RECEIVING CHANNELS FOR DERIVING THEREFROM COMPONENT SIGNALS RESPECTIVELY, OF ECHO SIGNALS RECEIVED BY WHICHEVER ONE OF SAID AUXILIARY RECEIVING CHANNELS, AND FOR APPLYING SUCH COMPONENT SIGNALS TO SAID OSCILLOGRAPH, WHEREBY IT IS POSSIBLE TO DETERMINE BY INTERPOLATION FGROM SAID TWO VISUALLY EXHIBITED INDICATIONS OF MISSILE POSITIONS THE RELATIVE POSITION OF SUCH MISSLE WITH RESPECT TO THE TARGET AT THE MOMENT WHEN THE MISSILE IS AT A DISTANCE SUBSTANTIALLY EQUAL TO THAT OF THE TARGET.