Electric lamp and discharge devices – Cathode ray tube – Plural beam generating or control
Patent
1986-08-21
1987-04-21
DeMeo, Palmer C.
Electric lamp and discharge devices
Cathode ray tube
Plural beam generating or control
313412, 313414, 313440, 315 14, H01J 2951, H01J 2976
Patent
active
046599614
ABSTRACT:
For use in an in-line electron gun of a cathode ray tube, a cup member comprises a planar plate having three apertures aligned with one another and a collar portion protruded from the planar plate. A height of the collar portion is between 2 mm and 6 mm, both inclusive. The collar portion may be either uniform in height or divided into a first pair of protrusions transversely of a predetermined straight line passing through the three apertures and a second pair of protrusions contiguous to the first pair of protrusions and lower in height than the first pair of protrusions.
REFERENCES:
patent: 4225804 (1980-09-01), Bekaert et al.
patent: 4415831 (1983-11-01), Konosu
DeMeo Palmer C.
NEC Corporation
Razavi M.
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