205053 ⎘
Details of cathode-ray tubes or of electron-beam tubes of the types covered by group; Arrangements of electrodes and associated parts for generating or controlling the ray or beam, e.g. electron-optical arrangement; Arrangements for deflecting ray or beam; Systems for correcting deviation or convergence of a plurality of beams by means of magnetic fields at least; Convergence correction arrangements therefor Static convergence systems
Color cathode-ray tube apparatus
#2Velocity modulation coil apparatus and cathode-ray tube apparatus
#3Cathode-ray tube apparatus with magnetic spacers between magnetic rings
#4Color picture tube apparatus
#5Cathode-ray tube device capable of reducing misconvergence
#6Convergence compensating deflection yoke
#7Color picture tube apparatus having a pair of bar shaped magnets for correcting misconvergence due to the rotational shift of the electron beams