Method and apparatus for preventing collisions between vehicles

Claim 1

A METHOD OF PREVENTING COLLISIONS BETWEEN MOVING AERIAL OR MARITIME VEHICLES, COMPRISING THE STEPS OF TRANSMITTING FROM ONE OF THE VEHICLES AS A FIRST SIGNAL A WIRELESS SIGNAL BEAM OF ROTATIONALLY VARYING ANGULAR DIRECTION IN A SUBSTANTIALLY HORIZONTAL PLANE AND DETERMINED AS THE ANGLE BETWEEN THE DIRECTION OF SAID BEAM AND THE DIRECTION OF MOVEMENT OF SAID ONE VEHICLE, SAID FIRST SIGNAL HAVING A VARYING MESSAGE CHARACTERISTIC FUNCTIONALLY INDICATIVE OF THE PRODUCT OF THE VELOCITY OF MOVEMENT OF SAID ONE VEHICLE AND OF THE MOMENTARY VALUES OF THE SINE OF SAID VARYING ANGLE; RECEIVING SAID WIRELESS SIGNAL ABOARD ANOTHER ONE OF THE VEHICLES BY MEANS OF A DIRECTION FINDING ANTENNA; PRODUCING ABOARD SAID OTHER VEHICLE A SECOND SIGNAL HAVING A VARYING CHARACTERISTIC FUNCTIONALLY INDICATIVE OF THE PRODUCT OF THE VELOCITY OF MOVEMENT OF SAID OTHER VEHICLE AND OF THE MOMENTARY VALUES OF THE SINE VARYING POSITIONAL ANGLES OF THE DIRECTION FINDING ANTENNA CYCLICALLY INCREASING BETWEEN ZERO AND 360* IN A SUBSTANTIALLY HORIZONTAL PLANE WITH THE DIRECTION OF MOVEMENT OF SAID OTHER VEHICLE AS ZERO DIRECTION AND INCREASING IN A CIRCULAR DIRECTION OPPOSITE TO THE DIRECTION OF INCREASE OF THE VARYING DIRECTIONAL ANGLE OF SAID SIGNAL BEAM; INDICATING ABOARD SAID OTHER VEHICLE, AT THE MOMENT OF THE RECEPTION OF SAID FIRST SIGNAL TRANSMITTED FROM SAID ONE VEHICLE, SAID MESSAGE CHARACTERISTIC INDICATIVE OF SAID PRODUCT OF THE VELOCITY OF MOVEMENT OF SAID ONE VEHICLE AND THE MOMENTARY VALUE OF THE SINE OF THE DIRECTIONAL ANGLE OF SAID SIGNAL BEAM; AND INDICATING ABOARD SAID OTHER VEHICLE AT THE SAME MOMENT SAID CHARACTERISTIC OF SAID SECOND SIGNAL INDICATIVE OF THE PRODUCT OF THE MOMENTARY VALUE OF SAID POSITIONAL ANGLE AND OF THE VELOCITY OF MOVEMENT OF SAID OTHER VEHICLE, WHEREBY DANGER OF COLLISION IS INDICATED IF THE INDICATION OF SAID FIRST MENTIONED PRODUCT IS SUBSTANTIALLY EQUAL WITH THE INDICATION OF SAID LAST MENTIONED PRODUCT.

Claim 2

A METHOD OF PREVENTING COLLISIONS BETWEEN MOVING AERIAL OR MARITIME VEHICLES, COMPRISING THE STEPS OF TRANSMITTING FROM ONE OF THE VEHICLES AS A FIRST SIGNAL A WIRELESS SIGNAL BEAM OF ROTATIONALLY VARYING ANGULAR DIRECTION IN A SUBSTANTIALLY HORIZONTAL PLANE AND DETERMINED AS THE ANGLE BETWEEN THE DIRECTION OF SAID BEAM AND THE DIRECTION OF MOVEMENT OF SAID ONE VEHICLE, SAID FIRST SIGNAL HAVING A VARYING MESSAGE CHARACTERISTIC FUNCTIONALLY INDICATIVE OF THE PRODUCT OF THE VELOCITY OF MOVEMENT OF SAID ONE VEHICLE AND OF THE MOMENTARY VALUES OF THE SINE OF SAID VARYING ANGLE; RECEIVING SAID WIRELESS SIGNAL ABOARD ANOTHER ONE OF THE VEHICLES BY MEANS OF A DIRECTION FINDING ANTENNA; PRODUCING ABOARD SAID OTHER VEHICLE A SECOND SIGNAL HAVING A VARYING CHARACTERISTIC FUNCTIONALLY INDICATIVE OF THE PRODUCT OF THE VELOCITY OF MOVEMENT OF SAID OTHER VEHICLE AND OF THE MOMENTARY VALUES OF THE SINE VARYING POSITIONAL ANGLES OF THE DIRECTION FINDING ANTENNA CYCLICALLY INCREASING BETWEEN ZERO AND 360* IN A SUBSTANTIALLY HORIZONTAL PLANE WITH THE DIRECTION OF MOVEMENT OF SAID OTHER VEHICLE AS ZERO DIRECTION AND INCREASING IN A CIRCULAR DIRECTION OPPOSITE TO THE DIRECTION OF INCREASE OF THE VARYING DIRECTIONAL ANGLE OF SAID SIGNAL BEAM; INDICATING ABOARD SAID OTHER VEHICLE, AT THE MOMENT OF THE RECEPTION OF SAID FIRST SIGNAL TRANSMITTED FROM SAID ONE VEHICLE, SAID MESSAGE CHARACTERISTIC INDICATIVE OF SAID PRODUCT OF THE VELOCITY OF MOVEMENT OF SAID ONE VEHICLE AND THE MOMENTARY VALUE OF THE SINE OF THE DIRECTIONAL ANGLE OF SAID SIGNAL BEAM; AND INDICATING ABOARD SAID OTHER VEHICLE AT THE SAME MOMENT SAID CHARACTERISTIC OF SAID SECOND SIGNAL INDICATIVE OF THE PRODUCT OF THE MOMENTARY VALUE OF SAID POSITIONAL ANGLE AND OF THE VELOCITY OF MOVEMENT OF SAID OTHER VEHICLE, WHEREBY DANGER OF COLLISION IS INDICATED IF THE INDICATION OF SAID FIRST MENTIONED PRODUCT IS SUBSTANTIALLY EQUAL WITH THE INDICATION OF SAID LAST MENTIONED PRODUCT.