FR849076A - Double envelope incandescent electric lamp - Google Patents
Double envelope incandescent electric lampInfo
- Publication number
- FR849076A FR849076A FR849076DA FR849076A FR 849076 A FR849076 A FR 849076A FR 849076D A FR849076D A FR 849076DA FR 849076 A FR849076 A FR 849076A
- Authority
- FR
- France
- Prior art keywords
- electric lamp
- incandescent electric
- double envelope
- envelope
- double
- 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
- H01K1/00—Details
- H01K1/58—Cooling arrangements
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01K—ELECTRIC INCANDESCENT LAMPS
- H01K1/00—Details
- H01K1/28—Envelopes; Vessels
- H01K1/34—Double wall vessels
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B20/00—Energy efficient lighting technologies, e.g. halogen lamps or gas discharge lamps
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CH512803X | 1938-01-28 |
Publications (1)
Publication Number | Publication Date |
---|---|
FR849076A true FR849076A (en) | 1939-11-14 |
Family
ID=4517539
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
FR849076D Expired FR849076A (en) | 1938-01-28 | 1939-01-18 | Double envelope incandescent electric lamp |
Country Status (6)
Country | Link |
---|---|
US (1) | US2188945A (en) |
CH (1) | CH204631A (en) |
DE (1) | DE741917C (en) |
FR (1) | FR849076A (en) |
GB (1) | GB512803A (en) |
NL (1) | NL53880C (en) |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CA2789267A1 (en) * | 2010-02-08 | 2011-08-11 | Ole K. Nilssen | Evaporation cooled lamp |
-
0
- NL NL53880D patent/NL53880C/xx active
-
1938
- 1938-01-28 CH CH204631D patent/CH204631A/en unknown
- 1938-03-16 GB GB8166/38A patent/GB512803A/en not_active Expired
-
1939
- 1939-01-14 US US250902A patent/US2188945A/en not_active Expired - Lifetime
- 1939-01-18 FR FR849076D patent/FR849076A/en not_active Expired
- 1939-01-21 DE DES135496D patent/DE741917C/en not_active Expired
Also Published As
Publication number | Publication date |
---|---|
CH204631A (en) | 1939-05-15 |
DE741917C (en) | 1943-11-19 |
GB512803A (en) | 1939-09-26 |
NL53880C (en) | |
US2188945A (en) | 1940-02-06 |
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