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Method of manufacturing miniature incandescent lamps

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专利汇可以提供Method of manufacturing miniature incandescent lamps专利检索,专利查询,专利分析的服务。并且In the manufacture of a single ended subminiature incandescent lamp, a helically coiled wire filament is bent into a hairpin shape and is mounted on a temporary support while the mandrel on which the wire has been coiled is still within the filament. The filament is then inserted into acid in order to dissolve the mandrel at the apex portion of the filament. The filament is then sealed within a glass envelope.,下面是Method of manufacturing miniature incandescent lamps专利的具体信息内容。

1. In the process of manufacturing a single ended subminiature incandescent lamp, the steps which sequentially comprise: helically coiling a length of fine tungsten wire on a mandrel wire having a larger diameter; heat treating and cutting the coiling into predetermined lengths; bending each of the cut lengths into a hairpin shape; attaching the ends of the hairpin to a temporary support; dissolving part of the mandrel at the apex end of the hairpin; inserting the hairpin into an open ended glass tube; heating and press sealing one end of the glass tube onto a portion of the legs of the hairpin, said portion still containing mandrel wire; sealing the other end of the glass tube and removing the temporary support to form a finished lamp.
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