GB390787A - Improvements in electric discharge lamps - Google Patents
Improvements in electric discharge lampsInfo
- Publication number
- GB390787A GB390787A GB2421/33A GB242133A GB390787A GB 390787 A GB390787 A GB 390787A GB 2421/33 A GB2421/33 A GB 2421/33A GB 242133 A GB242133 A GB 242133A GB 390787 A GB390787 A GB 390787A
- Authority
- GB
- United Kingdom
- Prior art keywords
- lamp
- electrodes
- resistance
- mms
- pressure
- 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
- H01J61/56—One or more circuit elements structurally associated with the lamp
Landscapes
- Vessels And Coating Films For Discharge Lamps (AREA)
- Discharge Lamp (AREA)
Abstract
390,787. Discharge lamps. GENERAL ELECTRIC CO., Ltd., Magnet House, Kingsway, London.-(Assignees of Patent- Treuhand-Ges. f³r Elektrische Gl³hlampen; 11, Ehrenbergstrasse, Berlin.) Jan. 25, 1933, No. 2421. Convention date, Feb. 22, 1932. [Class 39 (i).] A heating resistance 16 in series with a U-shaped lamp is arranged between the arms 11 of the lamp, which is mounted within a capped vitreous container 1. A support 9, sealed into the pinch 4, is formed with a loop 10 to hold the lamp, and is provided with clamps 18 which serve as supports for the resistance 16. The lamp may comprise thermionic electrodes, heated by the discharge or by auxiliary means, or may comprise cold hollow electrodes 13, formed of sheet metal and coated with an alkaline-earth metal or compound. Alternatively, electron-emitting material may be contained within perforated sheet-metal electrodes. Starting is facilitated. by a wire 14 which is supported by the electrodes through glass beads 15, or by an internal or external carbon coating on the lamp formed by heating a carbonaceous cement. The filling of the lamp consists of sodium and a mixture of neon and helium at a pressure of 10 mms., and to reduce radiation of heat, the envelope may be evacuated or contain carbon dioxide at a pressure of 1-10 mms. The resistance consists of wire mounted between magnesia plates.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE390787X | 1932-02-22 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB390787A true GB390787A (en) | 1933-04-13 |
Family
ID=6376066
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB2421/33A Expired GB390787A (en) | 1932-02-22 | 1933-01-25 | Improvements in electric discharge lamps |
Country Status (3)
| Country | Link |
|---|---|
| US (1) | US2020736A (en) |
| FR (1) | FR747940A (en) |
| GB (1) | GB390787A (en) |
Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2491881A (en) * | 1944-02-26 | 1949-12-20 | Gen Electric | Darkroom lamp |
| US2774013A (en) * | 1949-04-07 | 1956-12-11 | Gen Electric | Electric discharge lamp |
| US2624023A (en) * | 1949-10-19 | 1952-12-30 | Gen Electric | Lamp unit |
| US2679020A (en) * | 1950-01-21 | 1954-05-18 | Lany Beatrice Pearson De | Electrical circuits for arcs with pool-type electrodes |
| US2673303A (en) * | 1950-01-21 | 1954-03-23 | Lany Beatrice Pearson De | Electrical arc with pool-type electrodes |
| US4987342A (en) * | 1989-03-27 | 1991-01-22 | Gte Products Corporation | Self-ballasted glow discharge lamp having indirectly-heated cathode |
-
1932
- 1932-12-22 FR FR747940D patent/FR747940A/en not_active Expired
-
1933
- 1933-01-20 US US652736A patent/US2020736A/en not_active Expired - Lifetime
- 1933-01-25 GB GB2421/33A patent/GB390787A/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| FR747940A (en) | 1933-06-26 |
| US2020736A (en) | 1935-11-12 |
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