利索-全球专利检索

  1. 登录
  2. 注册

搜索结果

12 条记录 (耗时 0.009 秒)

    Methods of and apparatus for heating a preform from which lightguide fiber is drawn
    11.
    发明授权
    Methods of and apparatus for heating a preform from which lightguide fiber is drawn 失效
    用于加热从其中拉出光导纤维的预成型件的方法和设备

    公开(公告)号：US4383843A

    公开(公告)日：1983-05-17

    申请号：US302933

    申请日：1981-09-16

    申请人： Rama Iyengar

    发明人： Rama Iyengar

    IPC分类号： C03B37/027 ,  C03B37/029 ,  G02B6/00 ,  C03B37/025

    CPC分类号： C03B37/029 ,  C03B2205/68 ,  C03B2205/80 ,  C03B2205/82

    摘要： Apparatus for heating a vertically suspended preform from which lightguide fiber is drawn includes a torch having a plurality of ducts that open to a surface adjacent to a lower end of the preform. Fuel and oxidizing gases flow from the ducts, mix at the surface and flame about a necked-down, lower portion of the preform to form a melt cone from which the fiber is drawn. The ducts and the preform are positioned to cause a combustion zone of each flame to impinge upon the preform. In a preferred embodiment, the openings of the ducts are arrayed in a circle which is referred to as a pitch circle and which has a diameter that is less than that of the preform. Also, the ducts are arranged so that the gases are directed at a predetermined angle to the axis of the preform.

    摘要翻译： 用于加热从其中拉出光导纤维的垂直悬挂的预制件的装置包括具有多个通道的手电筒，所述多个导管对于与预成型件的下端相邻的表面开放。 燃料和氧化气体从管道流出，在表面和火焰周围围绕预制件的颈缩下部混合以形成熔融锥体，纤维从该锥体拉出。 导管和预成型件被定位成使得每个火焰的燃烧区域撞击预成型件。 在优选实施例中，管道的开口被排列成圆形，其被称为节圆，并且其直径小于预制件的直径。 而且，管道被布置成使得气体以预定角度指向预成型件的轴线。