FR693583A - Improvements to electric lighting devices - Google Patents
Improvements to electric lighting devicesInfo
- Publication number
- FR693583A FR693583A FR693583DA FR693583A FR 693583 A FR693583 A FR 693583A FR 693583D A FR693583D A FR 693583DA FR 693583 A FR693583 A FR 693583A
- Authority
- FR
- France
- Prior art keywords
- lighting devices
- electric lighting
- electric
- devices
- lighting
- 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
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F21—LIGHTING
- F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
- F21V7/00—Reflectors for light sources
- F21V7/04—Optical design
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR693583T | 1930-04-09 |
Publications (1)
Publication Number | Publication Date |
---|---|
FR693583A true FR693583A (en) | 1930-11-21 |
Family
ID=9041756
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
FR693583D Expired FR693583A (en) | 1930-04-09 | 1930-04-09 | Improvements to electric lighting devices |
Country Status (1)
Country | Link |
---|---|
FR (1) | FR693583A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2447923A (en) * | 1944-08-26 | 1948-08-24 | Holophane Co Inc | Lighting system and lighting units for use therein |
-
1930
- 1930-04-09 FR FR693583D patent/FR693583A/en not_active Expired
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2447923A (en) * | 1944-08-26 | 1948-08-24 | Holophane Co Inc | Lighting system and lighting units for use therein |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
FR725619A (en) | Improvements to electrical switches | |
FR726012A (en) | Electric lighting fixture | |
FR763504A (en) | Electric cable | |
FR693583A (en) | Improvements to electric lighting devices | |
FR719194A (en) | Improvements to electrical conductors | |
FR737400A (en) | Improvements to electric lighting devices | |
FR618163A (en) | Improvements to electric lighting devices | |
FR761140A (en) | Improvements to electric lighting devices | |
FR628554A (en) | Improvements to electric lighting devices | |
FR630362A (en) | Improvements to electric lighting installations | |
FR618369A (en) | Improvements to electric lighting devices | |
FR731013A (en) | Improvements to electric lighting devices and devices | |
FR724923A (en) | Electric lighting equipment | |
FR678997A (en) | Improvements to suspension devices for electric lighting devices | |
FR693556A (en) | Improvements to electrical switches | |
FR722862A (en) | Electric underground lighting installation | |
FR707907A (en) | Improvements to electrical regulation devices | |
FR711817A (en) | Improvements to electrical conductors | |
FR751341A (en) | Improvements to public lighting devices | |
FR727746A (en) | Electric lighting device | |
FR643615A (en) | complete electric lighting equipment for motorcycles | |
FR722363A (en) | Electric flashing signal | |
FR549072A (en) | Improvements to fixed electric lighting devices | |
FR711440A (en) | Improvements to lighting devices | |
FR706219A (en) | Improvements to mains-mounted electrical devices |