Visual guidance system for approach and landing of aircraft

Claim 1

VEHICULAR GUIDANCE APPARATUS COMPRISING: (A) FIRST ELECTROMAGNETIC ENERGY RADIATING MEANS FOR RADIATING DETECTABLE, SENSIBLE ENERGY INTO AN AREA ADJACENT SAID MEANS, (B) SECOND ELECTROMAGNETIC ENERGY RADIATING MEANS FOR RADIATING ENERGY INTO AN AREA ADJACENT SAID MEANS, (C) EACH OF SAID RADIATING MEANS INCLUDING A PAIR OF ANGULARLY ORIENTED ENERGY RADIATORS AND A FURTHER ENERGY RADIATOR DISPOSED AT THE APEX THEREOF PROVIDING A COURSE RATE CUE FOR AN OBSERVER UTILIZING SAID APPARATUS, (D) MEANS FOR ROTATING SAID FIRST AND SECOND RADIATING MEANS AT A CONSTANT ANGULAR VELOCITY EFFECTIVE TO CAUSE THE ENERGY RADIATED THEREBY TO INTERSECT AT A POINT REMOTE THEREFROM AND TO DEFINE A LINE WHICH EFFECTIVELY MOVES TOWARD A LINE JOINING THE RADIATING MEANS AT A CONSTANTLY DECREASING VELOCITY SO THAT WITH THE OBSERVER MOVING AT THE SAME RATE AS THE MOVEMENT OF SAID LINE TOWARD SAID RADIATING MEANS THE OBSERVER IS EFFECTIVELY LED TO A POSITION SUBSTANTIALLY MIDWAY BETWEEN SAID RADIATING MEANS, AND (E) A THIRD ELECTROMAGNETIC ENERGY RADIATING MEANS OPERABLY ASSOCIATED WITH SAID FIRST AND SECOND RADIATING MEANS AND SUBSTANTIALLY IDENTICAL THERETO PROVIDING A COURSE ANGLE CUE FOR THE OBSERVER RELATIVE TO THE OTHER TWO RADIATING MEANS.