Electric lamp and discharge devices – Cathode ray tube – Shadow mask – support or shield
Patent
1988-12-08
1990-08-14
Wieder, Kenneth
Electric lamp and discharge devices
Cathode ray tube
Shadow mask, support or shield
313479, H01J 2902, H04N 929
Patent
active
049490087
ABSTRACT:
A color cathode ray tube assembly includes an envelope including a funnel section, a neck section continued to one end of the funnel section, and a generally rectangular faceplate, which faceplate has a phosphor deposited screen and a rectangular side wall structure through which the faceplate is connected to the funnel section, a color selection mask disposed within the envelope in face-to-face relationship with the phosphor deposited screen; and a generally tubular outer magnetic shield made of a magnetizable material and mounted on the envelope so as to encircle the side wall structure of the faceplate and also the funnel section. The outer magnetic shield includes a generally tubular wall structure having a pair of opposite longer side walls extending generally parallel to the corresponding longer side walls of the faceplate, a pair of opposite shorter side walls extending generally parallel to the corresponding shorter side walls of the faceplate, and a corner wall positioned between respective ends of each longer side wall and the adjacent shorter side wall and confronting an associated corner between each longer side wall of the faceplate and the associated shorter side wall of the faceplate.
REFERENCES:
RCA paper A51-161X "Color Picture Tube Assembly", issued Mar., 1976.
Mitsubishi Denki & Kabushiki Kaisha
Wieder Kenneth
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