FR689240A - Fractional Filament Incandescent Electric Lamp - Google Patents
Fractional Filament Incandescent Electric LampInfo
- Publication number
- FR689240A FR689240A FR689240DA FR689240A FR 689240 A FR689240 A FR 689240A FR 689240D A FR689240D A FR 689240DA FR 689240 A FR689240 A FR 689240A
- Authority
- FR
- France
- Prior art keywords
- fractional
- electric lamp
- incandescent electric
- filament incandescent
- filament
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01K—ELECTRIC INCANDESCENT LAMPS
- H01K9/00—Lamps having two or more incandescent bodies separately heated
- H01K9/02—Lamps having two or more incandescent bodies separately heated to provide substitution in the event of failure of one of the bodies
- H01K9/04—Lamps having two or more incandescent bodies separately heated to provide substitution in the event of failure of one of the bodies with built-in manually operated switch
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR689240T | 1930-02-01 |
Publications (1)
Publication Number | Publication Date |
---|---|
FR689240A true FR689240A (en) | 1930-09-03 |
Family
ID=9027172
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
FR689240D Expired FR689240A (en) | 1930-02-01 | 1930-02-01 | Fractional Filament Incandescent Electric Lamp |
Country Status (1)
Country | Link |
---|---|
FR (1) | FR689240A (en) |
-
1930
- 1930-02-01 FR FR689240D patent/FR689240A/en not_active Expired
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