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    Glass funnel with a nearly rectangular cross-sectioned parabolic region especially for a television tube
    5.
    发明授权
    Glass funnel with a nearly rectangular cross-sectioned parabolic region especially for a television tube 失效
    具有近似矩形横截面的抛物面区域的玻璃漏斗，特别适用于电视管

    公开(公告)号：US06353284B1

    公开(公告)日：2002-03-05

    申请号：US09569288

    申请日：2000-05-12

    申请人： Peter Elfner ,  Anne Schott ,  Stefan Hergott

    发明人： Peter Elfner ,  Anne Schott ,  Stefan Hergott

    IPC分类号： H01J3100

    CPC分类号： H01J29/861 ,  H01J2229/8606 ,  H01J2229/87

    摘要： The glass funnel for a cathode ray tube includes a cylindrical funnel neck (2); a funnel body (4) having successive transverse cross-sections that change over from a substantially circular shape to a substantially rectangular shape with cross-sectional areas growing continuously in a direction moving away from the funnel neck and a parabolic region (3) arranged between the funnel neck and the funnel body and having respective connecting sections to the funnel neck and the funnel body having corresponding substantially circular cross-sections. The parabolic region (3) has at least one part with a substantially rectangular cross-section and the at least one part is located between the respective connecting sections to the funnel neck and the funnel body. When a cathode ray tube is made from the glass funnel the electron gun is located in the funnel neck and the deflecting coil is arranged around to the parabolic section so that it is substantially closer than in the prior art cathode ray tube. The glass funnel described herein thus provides energy savings and a more precise electron beam guidance than the corresponding prior art glass funnel, when it is incorporated in a cathode ray tube.

    摘要翻译： 用于阴极射线管的玻璃漏斗包括圆筒形漏斗颈（2）; 具有连续的横截面的漏斗体（4），所述漏斗体（4）具有从基本上圆形形状向基本上矩形形状的横截面，所述截面面积在远离漏斗颈的方向上连续地生长，并且抛物线区域（3） 漏斗颈部和漏斗体，并且具有到漏斗颈部的相应连接部分，并且漏斗体具有对应的基本圆形的横截面。 抛物线区域（3）具有至少一个具有基本上矩形横截面的部分，并且至少一个部分位于与漏斗颈部和漏斗主体相应的连接部分之间。 当阴极射线管由玻璃漏斗形成时，电子枪位于漏斗颈部，并且偏转线圈围绕抛物线部分设置，使得其基本上比现有技术的阴极射线管更接近。 因此与此相对应的现有技术的玻璃漏斗当玻璃漏斗结合在阴极射线管中时，这里描述的玻璃漏斗提供了节能和更精确的电子束引导。