| 摘要 |
PROBLEM TO BE SOLVED: To bend an incandescent lamp equipped with a tubular bulb having a coaxially disposed filament without encountering a problem on the alignment of the filament in the bulb during the useful service life of the lamp. SOLUTION: This incandescent lamp is equipped with a tubular bulb 3, and a filament 4 is coaxially disposed in the bulb 3. Each end of the bulb is airtightly sealed with a pinch part 5 provided around a piece 1 of metallic foil to which an external lead 7 and an internal lead 6 are fastened, with the lead 6 electrically connected to the filament. An intermediate second piece 2 of flat foil is put between the filament 4 and the internal lead 6, and directly joined to an end 9 of the filament. The bulb is bent into an L shape on the level of the second piece 2 of flat foil.
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