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Abstract not available
for ZA7005896
Abstract of correspondent:
GB1304567
|
| 1304567 Colour television
tubes PHILIPS ELECTRONIC & ASSOCIATED INDUS-
TRIES Ltd 3 Sept 1970 [6 Sept 1969] 42247/70
Heading H1D In a colour television tube wherein a
shadow mask is supported in a faceplate by means
of resilient members attached to the mask and
provided with an aperture or a stud adapted to
engage a stud or an aperture on the faceplate, the
stud being circular and the aperture a rounded
triangle, deformation and consequent rigidity may
be caused by the shrinking of the aperture over
the stud on cooling from the high temperature
employed in processing the tube; this effect is
avoided by employing for the member in which the
aperture is formed a material having a thermal
expansion coefficient equal to or lower than that
of the material used for the stud. In one
arrangement (Fig. 4, not shown) each resilient
member is a bimetal strip and the aperture is
provided in the strip of lower thermal expansion
coefficient. In other arrangements each resilient
member is of chromium-nickel-steel and the
aperture is formed in a plate of-material of low
expansion coefficient which is either welded to
one end of the member (Fig. 10, not shown) or
extends across a large aperture in the member
(Fig. 9, not shown). In further arrangements the
resilient member is either connected to or
integral with the stud; the co-operating aperture
may be formed in a U-shaped strip secured to the
glass wall (Fig. 5, not shown) or in the glass
wall itself (Fig. 6, not shown) and in the latter
case the aperture may be lined with metal (Fig. 7,
not shown). |
Data supplied from the esp@cenet database
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