公开(公告)号：US4311940A

公开(公告)日：1982-01-19

申请号：US118167

申请日：1980-02-04

申请人： John Fitzgerald ,  Willem L. Van Hoorn

发明人： John Fitzgerald ,  Willem L. Van Hoorn

IPC分类号： H01K1/18 ,  H01K1/28 ,  H01K1/32 ,  H01K7/02 ,  H01J1/88 ,  H01J19/42

CPC分类号： H01K7/02 ,  H01K1/28

摘要： In electric incandescent lamps the efficiency can be increased by surrounding the filament with a light-pervious, infra-red radiation-reflecting filter. It has hitherto always been assumed that the geometry of the filter and that of the filament should be well matched to each other. This, however, results in a complex filament construction.According to the invention, near the center of a spherical filter, a flat filament consisting of several parts is accommodated, being situated within a square the sides of which are from 0.25 to 0.04 times the diameter of the filter. Such a filament has a relatively simple construction and provides a highly efficient lamp despite the fact that its geometry is very different from that of the filter.

摘要翻译： 在电白炽灯中，通过用透光的红外辐射反射滤光片围绕灯丝可以提高效率。 迄今为止总是假设过滤器的几何形状和灯丝的几何形状应该彼此良好地匹配。 然而，这导致了复杂的灯丝结构。 根据本发明，在球形过滤器的中心附近，容纳由多个部件组成的扁平细丝，位于正方形内，其侧面是过滤器直径的0.25至0.04倍。 尽管其几何形状与过滤器的几何形状非常不同，但是这种灯丝具有相对简单的结构并提供了高效率的灯。