Vectorscope apparatus for analysis of color television signals

Claim 1

VECTORSCOPE APPARATUS FOR PRODUCING IN APPARENT SIMULTANEITY ON THE SCREEN OF A CATHODE RAY TUBE DISPLAYS REPRESENTATIVE OF A PLURALITY OF DIFFERENTLY DELAYED TELEVISION SIGNALS EACH COMPOSED OF COMPONENTS MODULATED UPON A SUB-CARRIER OSCILLATION, COMPRISING, IN COMBINATION, TWO SYNCHRONOUS DEMODULATORS EACH HAVING ONE FIRST INPUT LEAD, ONE SECOND INPUT LEAD AND ONE OUTPUT LEAD THE OUTPUT SIGNAL OF ONE OF SAID DEMODULTORS CONTROLLING THE DEFLECTION IN THE OTHER OF THE TWO COORDINATE TIONS OF THE ELECTRON BEAM IN SAID CATHODE RAY TUBE AND THE OUTPUT SIGNAL OF THE OTHER OF SAID DEMONDULATIONS CONTROLLING THE DEFLECTION IN THE OTHER OF THE TWO CORDINATE DIRECTIONS OF THE ELECTRON BEAM IN SAID CATHODE RAY TUBE; A SET OF GATING MEANS EACH HAVING AN INPUT LEAD, SAID GATING MEANS PASSING A PLURALITY OF SIGNALS APPLIED TO THEIR INPUT LEADS IN CYCLIC SUCCESSION TO ONE OUTPUT LEADS; CONNECTION MEANS APPLYING SAID TELEVISION SIGNALS TO SAID INPUT LEADS OF SAID SET OF GATING MEANS; CONNECTION MEANS CONNECTING SAID OUTPUT LEAD OF SAID SET OF GATING MEANS WITH BOTH SAID FIRST INPUT LEADS OF SAID TWO SYNCHRONOUS DEMODULATORS; MEANS FOR APPLYING UNMODULATED SUB-CARRIER FREQUENCY OSCILLATIONS MUTUALLY DISPLACED IN PHASE BY 90* TO THE SECOND INPUT LEAD OF SAID SYNCHRONOUS DEMODULATORS; ABD MEANS FOR CAUSING THE PHASES OF SAID UNMODULATED SUB-CARRIER FREQUENCY OSCILLATIONS TO VARY ALIKE IN THE SAME CYCLIC SUCCESSION THEREBY TO PRODUCE ON THE SCREEN OF SAID CATHODE RAY TUBE SUPERIMPOSED DISPLAYS HAVING THE SAME INTRINSIC ANGULAR POSITION.