Electric lamp and discharge devices – Cathode ray tube – Envelope
Patent
1988-11-07
1990-08-21
Weider, Kenneth
Electric lamp and discharge devices
Cathode ray tube
Envelope
313477R, 313479, 313318, 439613, H01J 2990, H01R 13648
Patent
active
049509470
ABSTRACT:
A cathode ray tube includes a highly evacuated envelope including a funnel section having one end closed by a faceplate and the opposite end continued to a generally tubular neck section. An internal electroconductive coating is applied to an inner surface of at least the funnel section. Further, an anode button is embedded in a mounting hole defined in the wall of the envelope forming the funnel section and is connected electrically with the internal electroconductive coating. The anode button, embedded in the hole in the wall forming the funnel section, has a circumferentially extending side wall inclined relative to a direction generally parallel to a portion of the envelope confronting the interior of the envelope in alignment with the mounting hole. At least a portion of the inclined circumferentially extending side wall of the anode button is held in electrical contact with the internal electroconductive coating on the inner surface of the funnel section.
REFERENCES:
patent: 3626232 (1971-12-01), Ohgoshi et al.
patent: 3969647 (1976-07-01), Keen et al.
Mitsubishi Denki & Kabushiki Kaisha
Weider Kenneth
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