FIELD: lighting engineering.
SUBSTANCE: invention relates to lighting engineering. Electric filament lamp comprises base (1), transparent bulb (2), holder consisting of glass (3) and metal (4) parts, as well as main and backup spiral bodies (5) equipped with luminous elements (6) having magnetic properties. Main filament spiral body (5) is installed on holder metal (4) part. Glass (3) part of holder has projections (7) and recesses (8) to accommodate backup bodies (5).
EFFECT: technical result is longer service life of lamp.
1 cl, 3 dwg
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|---|---|---|---|
| ELECTRIC FILAMENT LAMP | 1992 |
|
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| FILAMENT LAMP | 1992 |
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