Sony Corporation

Hiroki Anzai

Yukinobu Iguchi

Masanori Ogiya

In assembling an electron gun (10), parts (11 to 18) are placed on supports (21) on the support base (2). The angle of a supported G3 grid (15) can be adjusted by moving the side of the G3A grid (15A), because the support (21) for the G3 grid (15) holds only the rear of the G3B grid (15B). Accordingly, in the event the G3A grid (15A) and the G3B grid (15B) are welded together out of position, adjuster pins (5) can be inserted into the guide holes (61) of the G3A grid (15A) without being bent, thereby adjusting beam holes (62) of G3A grid (15A) to coincide with the beam holes (62) of other grids. Accordingly, the beading apparatus (1) allows the electron gun (10) to be manufactured with considerable precision.

Beading apparatus for electron gun and method of attaching beading

An electron beam for a color CRT is equipped with three cathodes such that three electron beams may be emitted therefrom. Three grids are provided with beam passing holes for each of the three electron beams and are positioned in the path of the electron beams. The beam passing openings of the third grid are shifted from alignment with the beam passing openings of the first and second grid by a degree sufficient to focus the three beams appropriately relative to a central focal axis of the electron gun.

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Fukusima, Japan

Hiroki Anzai