Electric lamp and discharge devices – Cathode ray tube – Envelope
Patent
1991-10-03
1994-04-26
O'Shea, Sandra L.
Electric lamp and discharge devices
Cathode ray tube
Envelope
313440, 411417, H01J 2902, H01J 2970, F16B 3504
Patent
active
053069838
ABSTRACT:
A support device for a deflection unit (10) for a picture tube comprises pins (17) which in a longitudinal direction carry a thread (19) over part of their circumferences. The pins run in guide bores, which are constructed so as to exhibit a recess of not less than the angular circumference of the thread. Each pin is at first so aligned in relation to the associated guide bore that the thread runs in the above-mentioned recess. In this position (after the deflection unit has been aligned), each pin is pushed until it contacts the tube cone (18.K). Then each pin is turned by 90.degree., thus ensuring that the above-mentioned thread cuts into the non-recessed wall of the guide bore. This ensures that each pin is fixed in position, and simultaneously, due to the lead of the thread, a tension is set between deflection unit and tube. The support device thus constructed has the advantage that the tension force between the deflection unit and the tube cone can be set precisely. This insures that the optimum setting is not lost due to different tension forces acting at the locations of the different support elements, as was the case when conventional support elements were used.
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Nokia (Deutschland) (GmbH)
O'Shea Sandra L.
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