Cathode-ray tube

Details Cathode-ray tube Cathode-ray tube

H - Electricity

01

J

313/35.6

H01J 29/86 (2006.01)

Patent

CA 1206514

11 Abstract: "Cathode-ray tube". An envelope of a cathode-ray tube comprises a metal rear housing (1) and a glass face-plate (3) which is sealed in a vacuum- tight manner to a flange (2) on the rear housing by means of a seal (4) formed between the face-plate and the flange. To prevent the face-plate from peeling away from the seal and/or the seal from peeling away from the flange of the rear housing when the face-plate deflects inwards during evacuation of the envelope, spring clamps 5 are provided on the edges of the face-plate and flange, each clamp consisting of a spring- steel channel member with wall portions (9a and 9b) which converge towards the mouth of the channel member. The channel member, at parts (10a and 10b) thereof which bound or adjoin the converging wall portions where these portions are nearest one another, engage the front and rear surfaces (6 and 7) of the face-plate and the flange respectively to exert clamping forces on these surfaces in directions substantially perpendicular thereto. me clamps are very suitable for envelopes in which the face-plate and the flange of the rear housing are of rectangular shape with straight edges. (Figure 3).

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