Cathode-ray tube having unitary electrode plate of different thi

Details Cathode-ray tube having unitary electrode plate of different thi Cathode-ray tube having unitary electrode plate of different thi

1993-05-21

2000-03-21

O'Shea, Sandra

Electric lamp and discharge devices

Cathode ray tube

Plural beam generating or control

H01J 2946

Patent

active

060406550

ABSTRACT:
A cathode-ray tube having an electron gun which includes an electrode plate (E) in which a portion having three beam passage holes (H) and a portion having bead supports (S) are formed as a unitary or one piece structure, the two portions having different thicknesses (T.sub.1, T.sub.2), and the steps being inclinedly formed along the boundaries of the two portions. Since the portion having beam passage holes and the portion having bead supports are formed as a unitary or one piece structure easily and highly precisely in the electrode plate, the conventionally employed process of welding can be omitted, and thereby the productivity is raised and the manufacturing cost is decreased. Moreover, use of the material having the steps formed in advance contributes to increasing the productivity and preventing the machining tools from being damaged during the press-forming.

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patent: 5196762 (1993-03-01), Go
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patent: 5291093 (1994-03-01), Lee

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