Cathode-ray tube having an electron gun assembly with emissivity

Details Cathode-ray tube having an electron gun assembly with emissivity Cathode-ray tube having an electron gun assembly with emissivity

1983-11-29

1985-11-19

DeMeo, Palmer C.

Electric lamp and discharge devices

Cathode ray tube

Ray generating or control

313270, 313337, H01J 1914, H01J 2946

Patent

active

045544808

ABSTRACT:
In a cathode-ray tube an inline electron gun assembly includes a center cathode assembly disposed between two outer cathode assemblies. The center cathode assembly and the outer cathode assemblies each comprise a tubular cathode sleeve having oppositely disposed ends, a filament disposed within the sleeve and spaced therefrom, and a cathode eyelet coaxially surrounding at least a portion of the cathode sleeve. The cathode sleeve is open at one end and closed at the other end by a cap having an electron emissive material thereon. The open end of the cathode sleeve is attached to the interior surface of the eyelet. At least a portion of the interior surface of at least one of the eyelets is modified to change the radiant energy emission characteristics thereof.

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U.S. patent application Ser. No. 06/556,185, filed concurrently herewith, by S. T. Opresko, and entitled, "Cathode-Ray Tube having an Electron Gun Assembly with an Improved Cathode Eyelet Structure".

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