FR770380A - Electric incandescent lamp with a gaseous atmosphere intended more particularly for photography - Google Patents
Electric incandescent lamp with a gaseous atmosphere intended more particularly for photographyInfo
- Publication number
- FR770380A FR770380A FR770380DA FR770380A FR 770380 A FR770380 A FR 770380A FR 770380D A FR770380D A FR 770380DA FR 770380 A FR770380 A FR 770380A
- Authority
- FR
- France
- Prior art keywords
- photography
- incandescent lamp
- gaseous atmosphere
- electric incandescent
- atmosphere intended
- 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 |
---|---|---|---|
DE770380X | 1933-02-18 |
Publications (1)
Publication Number | Publication Date |
---|---|
FR770380A true FR770380A (en) | 1934-09-13 |
Family
ID=6675293
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
FR770380D Expired FR770380A (en) | 1933-02-18 | 1934-02-17 | Electric incandescent lamp with a gaseous atmosphere intended more particularly for photography |
Country Status (2)
Country | Link |
---|---|
BE (1) | BE401505A (en) |
FR (1) | FR770380A (en) |
-
0
- BE BE401505D patent/BE401505A/fr unknown
-
1934
- 1934-02-17 FR FR770380D patent/FR770380A/en not_active Expired
Also Published As
Publication number | Publication date |
---|---|
BE401505A (en) |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
FR846696A (en) | Electric incandescent gas lamp | |
FR770380A (en) | Electric incandescent lamp with a gaseous atmosphere intended more particularly for photography | |
FR775464A (en) | Improvements to incandescent electric lamps | |
FR837699A (en) | Incandescent electric lamp | |
FR765855A (en) | Base and corresponding socket for electric discharge tubes or incandescent lamps | |
FR848136A (en) | Vacuum Incandescent Electric Lamp | |
FR836840A (en) | Incandescent electric lamp | |
FR839200A (en) | Incandescent electric lamp | |
FR779807A (en) | Electric incandescent gas lamp | |
FR772157A (en) | Incandescent electric lamp | |
FR43514E (en) | Incandescent electric lamp with gaseous atmosphere | |
FR839169A (en) | Incandescent electric lamp | |
FR844304A (en) | Incandescent electric lamp | |
FR783372A (en) | Electric incandescent gas lamp | |
FR736750A (en) | Incandescent electric lamp | |
FR768297A (en) | Incandescent filament electric lamp | |
FR826612A (en) | Gas-filled incandescent electric lamp | |
FR757340A (en) | Improvements to incandescent electric lamps | |
FR779094A (en) | Incandescent electric lamp | |
FR784622A (en) | Incandescent electric lamp | |
FR797460A (en) | Incandescent electric lamp | |
FR830156A (en) | Incandescent electric lamp | |
FR820382A (en) | Incandescent electric lamp | |
FR844302A (en) | Incandescent electric lamp with a gaseous atmosphere | |
FR777504A (en) | Incandescent electric lamp for mines |