One piece astigmatic grid for color picture tube electron gun an

Details One piece astigmatic grid for color picture tube electron gun an One piece astigmatic grid for color picture tube electron gun an

1979-11-15

1981-12-29

Goldberg, Howard N.

Metal working

Barrier layer or semiconductor device making

Barrier layer device making

72326, H01J 914

Patent

active

043074987

ABSTRACT:
A one-piece astigmatic lens is formed in a grid by lancing a section threeof, coining the lanced section to a dimension wider than the trough formed by the lanced section and providing a beam aperture in the lanced and coined section.

REFERENCES:
patent: 3314272 (1967-04-01), Dahl
patent: 3852608 (1974-12-01), Johanns et al.
patent: 3873878 (1975-03-01), Odenthal
patent: 3931909 (1976-01-01), Dalli et al.
patent: 3980034 (1976-09-01), Delbenham
patent: 4143293 (1979-03-01), Hosokoshi et al.

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