ELECTRON-OPTICAL SYSTEM FOR CATHODE-RAY DEVICE Russian patent published in 1995 - IPC

FIELD: electronics. SUBSTANCE: electron-optical system has group of electrodes to form and to focus preliminarily electron beam, bipotential lens formed with cylinders of focusing electrode and anode fitted with springs. Cylinder of anode is manufactured separate from fittings of system and is anchored in neck of cathode-ray device with the help of flat axis-symmetric springs of level type. Springs are placed in groups perpendicular to generating line of cylinder of anode and symmetric to axis of cylinder. Groups of springs are positioned at equal distances from butts of cylinder of anode. Number of springs in group should be not less than two. Besides this cylinder of anode can be fitted with additional small cylinder on side of screen of cathode-ray device made fast to cylinder of anode and arranged in symmetry to its axis. Small cylinder has flanges which form groove in its surface housing additional fixing spring. EFFECT: enhanced operational efficiency. 2 cl, 2 dwg