Method and apparatus for providing reference points for mounting

Details Method and apparatus for providing reference points for mounting Method and apparatus for providing reference points for mounting

1977-09-07

1979-07-10

Wilbur, Maynard R.

Electric lamp and discharge devices: systems

Cathode ray tube circuits

Cathode-ray deflections circuits

313425, 315 10, H01J 2956

Patent

active

041609352

ABSTRACT:
The position of the electron beam axis of the central gun of an in-line tube is determined by moving the tube relative to a dynamic, multipole magnetic field produced by an electro-magnet mounted about the tube neck until a dot is displayed on the display screen. The line passing through the center of the field and the dot on the display screen defines the position of the beam axis and reference points related to that line are then provided on the tube envelope which locate the deflection unit so that its axis coincides with the beam axis.

REFERENCES:
patent: 3605053 (1971-09-01), Anthony
patent: 3934169 (1976-01-01), Groothoff et al.

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