GB766153A - Improvements in or relating to gaseous electric discharge devices - Google Patents
Improvements in or relating to gaseous electric discharge devicesInfo
- Publication number
- GB766153A GB766153A GB31207/53A GB3120753A GB766153A GB 766153 A GB766153 A GB 766153A GB 31207/53 A GB31207/53 A GB 31207/53A GB 3120753 A GB3120753 A GB 3120753A GB 766153 A GB766153 A GB 766153A
- Authority
- GB
- United Kingdom
- Prior art keywords
- per cent
- mercury
- fluorescent
- lamp
- weight
- 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
- H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
- H01J61/00—Gas-discharge or vapour-discharge lamps
- H01J61/02—Details
- H01J61/04—Electrodes; Screens; Shields
- H01J61/06—Main electrodes
- H01J61/067—Main electrodes for low-pressure discharge lamps
- H01J61/0675—Main electrodes for low-pressure discharge lamps characterised by the material of the electrode
- H01J61/0677—Main electrodes for low-pressure discharge lamps characterised by the material of the electrode characterised by the electron emissive material
Landscapes
- Discharge Lamp (AREA)
Abstract
766,153. Cathode materials: fluorescent discharge lamps. WESTINGHOUSE ELECTRIC INTERNATIONAL CO. Nov. 11, 1953 [Nov. 22, 1952], No. 31207/53. Drawings to Specification. Class 39(1). A gaseous electric discharge device, particularly a fluorescent lamp, has electrodes which are provided with an electron emissive coating material comprising at least one alkaline earth metal oxide and from 0À9 to less than 1 per cent., preferably 0À925 per cent., by weight of commercial zirconium dioxide, of the total weight of all the oxides. The commercial zirconium dioxide used includes approximately 1À5 to 5 per cent. of hafnium dioxide as an impurity. In preparing the emissive material a mixture, by weight of about 31 per cent. strontium carbonate, about 56 per cent. barium carbonate and about 13 per cent. calcium carbonate can be used. Each electrode can be wound into a minor coil which can be wound into a major coil to form a coiledcoil, the electron emissive material filling the space within the minor coil only. The electrodes can be used in a discharge lamp, the envelope of which is coated on its inner surface with fluorescent material and which is provided with an inert gas such as argon at a pressure of about 3 mms. of mercury together with a small quantity of mercury. The lamp is ordinarily operated at a mercury vapour pressure of between 1 and 20 microns. Specification 655,123 is referred to.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US766153XA | 1952-11-22 | 1952-11-22 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB766153A true GB766153A (en) | 1957-01-16 |
Family
ID=22133154
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB31207/53A Expired GB766153A (en) | 1952-11-22 | 1953-11-11 | Improvements in or relating to gaseous electric discharge devices |
Country Status (3)
| Country | Link |
|---|---|
| BE (1) | BE524490A (en) |
| DE (1) | DE1011073B (en) |
| GB (1) | GB766153A (en) |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE455364C (en) * | 1923-05-18 | 1928-01-30 | Siemens & Halske Akt Ges | Glow cathode tubes |
| BE482916A (en) * | 1947-06-05 |
-
0
- BE BE524490D patent/BE524490A/xx unknown
-
1953
- 1953-10-28 DE DEW12443A patent/DE1011073B/en active Pending
- 1953-11-11 GB GB31207/53A patent/GB766153A/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| BE524490A (en) | |
| DE1011073B (en) | 1957-06-27 |
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