Beam penetration color cathode ray tube

Claim 1

A CATHODE RAY TUBE COMPRISING A LUMINESCENT SCREEN AND THREE ELECTRON GUNS DISPOSED SIDE-BY-SIDE IN TRIANGULAR ARRAY FOR PROJECTING DIFFERENT VELOCITY ELECTRON BEAMS THROUGH A COMMON DEFLECTION ZONE TOWARD SAID SCREEN FOR USE IN A SYSTEM INCLUDING DEFLECTION MEANS FOR ESTABLISHING BEAM REFLECTION FIELDS IN SAID DEFLECTION ZONE FOR SCANNING SAID BEAMS OVER SAID SCREEN IN MUTUALLY TRANSVERSE DIRECTIONS AT DIFFERENT SCAN FREQUENCIES TO FORM A COMPOSITE RASTER, THE TWO OF SAID GUNS FOR PROJECTING THE TWO SLOWER OF SAID DIFFERENT VELOCITY BEAMS INCLUDING MAGNETIC TUBULAR SHIELDS WHICH SURROUND THEIR RESPECTIVE BEAMS AND WHICH EXTEND INTO SAID DEFLECTION ZONE, THE ONE OF SAID GUNS FOR PROJECTING THE FASTEST OF SAID DIFFERENT VELOCITY BEAMS BEING POSITIONED IN THE CENTRAL PLANE OF SAID SCREEN PERPENDICULAR TO THE DIRECTION OF SCAN PRODUCED BY THE HIGHER FREQUENCY ONE OF SAID DEFLECTION FIELDS.