FR499621A - - Google Patents
Info
- Publication number
- FR499621A FR499621A FR499621DA FR499621A FR 499621 A FR499621 A FR 499621A FR 499621D A FR499621D A FR 499621DA FR 499621 A FR499621 A FR 499621A
- Authority
- FR
- France
- 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
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
- H05B31/00—Electric arc lamps
- H05B31/0081—Controlling of arc lamps
- H05B31/009—Controlling of arc lamps with tightening devices
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
- H05B31/00—Electric arc lamps
- H05B31/003—Electric arc lamps of a special type
- H05B31/0039—Projectors, the construction of which depends upon the presence of the arc
Publications (1)
| Publication Number | Publication Date |
|---|---|
| FR499621A true FR499621A (en) | 1920-02-17 |
Family
ID=1534635
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| FR499621D Expired FR499621A (en) |
Country Status (1)
| Country | Link |
|---|---|
| FR (1) | FR499621A (en) |
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0
- FR FR499621D patent/FR499621A/fr not_active Expired