Incandescent lamp incorporating a tube-shaped glass vessel enclosing an axially accommodated filament

摘要

The lamps filament is encased in a glass tube whose ends are hermetically sealed by pinching around a metallic sheet to which are fixed interior and exterior electrical current connections. A second intermediate flat sheet is directly connected to the end of the filament between the latter and the interior current connection. The glass tube is bent at the position of the second sheet. The spiral type filament has one of its coils soldered to the second plate..