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Focussing electrode structure for colour TV CRT - has three apertures,with centre one circular and outer two of elongated shape of specified dimensions
Focussing electrode structure for colour TV CRT - has three apertures,with centre one circular and outer two of elongated shape of specified dimensions
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机译:彩色电视CRT的聚焦电极结构-具有三个孔,中心孔为一个圆形,外部两个为指定尺寸的细长形状
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摘要
The c.t. has heating elements in parallel coupled to cathodes generating electron emissions passing through control and screen electrodes. These are followed by a focussing electrode unit (1) having three apertures with a common centre line. The central aperture (a) is of circular cross-section, while the outer two (b', c') are of an elongated shape. The elongation is defined by the equation y + 0.04 less than or equal to x which is less than or equal to y + 0.14. Dimensions are in millimetres and x is the length and y is the width. ADVANTAGE - Improved focussing.
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