GB337782A - Improvements in and relating to electric lamps and the like - Google Patents
Improvements in and relating to electric lamps and the likeInfo
- Publication number
- GB337782A GB337782A GB20547/29A GB2054729A GB337782A GB 337782 A GB337782 A GB 337782A GB 20547/29 A GB20547/29 A GB 20547/29A GB 2054729 A GB2054729 A GB 2054729A GB 337782 A GB337782 A GB 337782A
- Authority
- GB
- United Kingdom
- Prior art keywords
- finely
- bulbs
- divided
- relating
- electric lamps
- 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
- PNEYBMLMFCGWSK-UHFFFAOYSA-N Alumina Chemical compound [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 abstract 3
- ZOKXTWBITQBERF-UHFFFAOYSA-N Molybdenum Chemical compound [Mo] ZOKXTWBITQBERF-UHFFFAOYSA-N 0.000 abstract 1
- 238000007689 inspection Methods 0.000 abstract 1
- 229910052750 molybdenum Inorganic materials 0.000 abstract 1
- 239000011733 molybdenum Substances 0.000 abstract 1
- 238000007789 sealing Methods 0.000 abstract 1
- HBMJWWWQQXIZIP-UHFFFAOYSA-N silicon carbide Chemical compound [Si+]#[C-] HBMJWWWQQXIZIP-UHFFFAOYSA-N 0.000 abstract 1
- 229910010271 silicon carbide Inorganic materials 0.000 abstract 1
- 229910052715 tantalum Inorganic materials 0.000 abstract 1
- GUVRBAGPIYLISA-UHFFFAOYSA-N tantalum atom Chemical compound [Ta] GUVRBAGPIYLISA-UHFFFAOYSA-N 0.000 abstract 1
- WFKWXMTUELFFGS-UHFFFAOYSA-N tungsten Chemical compound [W] WFKWXMTUELFFGS-UHFFFAOYSA-N 0.000 abstract 1
- 229910052721 tungsten Inorganic materials 0.000 abstract 1
- 239000010937 tungsten Substances 0.000 abstract 1
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01K—ELECTRIC INCANDESCENT LAMPS
- H01K3/00—Apparatus or processes adapted to the manufacture, installing, removal, or maintenance of incandescent lamps or parts thereof
Landscapes
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Vessels And Coating Films For Discharge Lamps (AREA)
Abstract
337,782. British Thomson-Houston Co., Ltd., (Assignees of Wright, D. K.). Feb. 18, 1929, [Convention date]. Drawings to Specification. Vacuum tubes. - A quantity of finely-divided tungsten is inserted into the bulbs of arc lamps or other electrical devices comprising elements heated to high temperatures in sealed evacuated or gas-filled bulbs or containers, prior to the sealing thereof, for the purpose of enabling deposits to be rubbed off their inner surfaces. The Specification as open to inspection under Sect. 91 (3) (a) mentions the use of finely-divided tantalum, molybdenum, fused aluminium oxide, and silicon carbide. This subject-matter does not appear in the Specification as accepted.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US341004A US1809661A (en) | 1929-02-18 | 1929-02-18 | Electric lamp |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB337782A true GB337782A (en) | 1930-11-04 |
Family
ID=23335861
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB20547/29A Expired GB337782A (en) | 1929-02-18 | 1929-07-04 | Improvements in and relating to electric lamps and the like |
Country Status (4)
| Country | Link |
|---|---|
| US (1) | US1809661A (en) |
| FR (1) | FR702878A (en) |
| GB (1) | GB337782A (en) |
| NL (2) | NL50283B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20060017367A1 (en) * | 2003-02-20 | 2006-01-26 | Ip2H Ag | Light source |
-
0
- NL NL28546D patent/NL28546C/xx active
- NL NL50283D patent/NL50283B/xx unknown
-
1929
- 1929-02-18 US US341004A patent/US1809661A/en not_active Expired - Lifetime
- 1929-07-04 GB GB20547/29A patent/GB337782A/en not_active Expired
-
1930
- 1930-02-14 FR FR702878D patent/FR702878A/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| NL50283B (en) | |
| US1809661A (en) | 1931-06-09 |
| FR702878A (en) | 1931-04-18 |
| NL28546C (en) |
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