FR670821A - Multiple filament electric lamp - Google Patents
Multiple filament electric lampInfo
- Publication number
- FR670821A FR670821A FR670821DA FR670821A FR 670821 A FR670821 A FR 670821A FR 670821D A FR670821D A FR 670821DA FR 670821 A FR670821 A FR 670821A
- Authority
- FR
- France
- Prior art keywords
- electric lamp
- multiple filament
- filament electric
- lamp
- 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 |
---|---|---|---|
FR670821T | 1929-03-02 |
Publications (1)
Publication Number | Publication Date |
---|---|
FR670821A true FR670821A (en) | 1929-12-05 |
Family
ID=9016580
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
FR670821D Expired FR670821A (en) | 1929-03-02 | 1929-03-02 | Multiple filament electric lamp |
Country Status (1)
Country | Link |
---|---|
FR (1) | FR670821A (en) |
-
1929
- 1929-03-02 FR FR670821D patent/FR670821A/en not_active Expired
Similar Documents
Publication | Publication Date | Title |
---|---|---|
FR687021A (en) | Incandescent electric lamp | |
FR706312A (en) | Electric gas discharge lamp | |
FR670821A (en) | Multiple filament electric lamp | |
FR648062A (en) | Incandescent electric lamp | |
FR697876A (en) | Electric lamp | |
FR676367A (en) | Three-filament electric lamp | |
FR696318A (en) | Incandescent electric lamp | |
FR702043A (en) | Incandescent electric lamp | |
FR672977A (en) | Incandescent electric lamp | |
FR707416A (en) | Incandescent electric lamp | |
FR606854A (en) | Electric lamp with subdivided filaments | |
FR667319A (en) | Improvements to electric filament lamps | |
FR676337A (en) | Incandescent electric lamps | |
FR736750A (en) | Incandescent electric lamp | |
FR34306E (en) | Incandescent electric lamp | |
FR676446A (en) | Incandescent electric lamp | |
FR648470A (en) | Incandescent electric lamp | |
FR674939A (en) | Incandescent electric lamp | |
FR672232A (en) | Incandescent electric lamp | |
FR679746A (en) | Incandescent electric lamp | |
FR674782A (en) | Incandescent electric lamp | |
FR708250A (en) | Electric gas lamp | |
FR598933A (en) | Multiple filament electric lamp for polyphase networks | |
FR674089A (en) | Electric hand lamp | |
FR688687A (en) | Electric hand lamp |