GB407565A - Improvements in luminous electric discharge lamps - Google Patents
Improvements in luminous electric discharge lampsInfo
- Publication number
- GB407565A GB407565A GB14759/33A GB1475933A GB407565A GB 407565 A GB407565 A GB 407565A GB 14759/33 A GB14759/33 A GB 14759/33A GB 1475933 A GB1475933 A GB 1475933A GB 407565 A GB407565 A GB 407565A
- Authority
- GB
- United Kingdom
- Prior art keywords
- discharge
- path
- wire gauze
- lamp
- metal
- 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
- H01J61/10—Shields, screens, or guides for influencing the discharge
- H01J61/103—Shields, screens or guides arranged to extend the discharge path
Landscapes
- Discharge Lamps And Accessories Thereof (AREA)
Abstract
407,565. Discharge lamps. GENERAL ELECTRIC CO., Ltd., Magnet House, Kingsway, London.-(Assignees of Patent-Treuhand- Ges. fur Elektrische Gl³hlampen ; 11, Ehrenbergstrasse, Berlin.) May 22, 1933, No. 14759. Convention date, May 23, 1932. [Class 39 (i).] In a lamp adapted to emit light from a tortuous discharge path in a direction normal to the plane containing at least two limbs of the path, the form of the discharge path is determined by a metal structure which is enclosed in a vitreous envelope which does not determine the form of the said path. The structure consists of a tungsten, nickel or iron box provided with partitions 11, 12, 13, which are formed of solid metal or of wire gauze. One or both of the sides 14, 15 of the structure are formed of glass, quartz or of wire gauze. Thermionic electrodes 18, 19, heated by the discharge, are housed in tubular extensions 16, 17. Termination of the discharge at the metal structure is prevented if the potential drop of the positive column is less than the sum of the falls of potential of the anode and cathode, or if the structure is oxidized. The structure may be silvered to form a reflector and may be connected through a resistance to one electrode to facilitate starting. Parts of the structure may be separated by insulation to form starting electrodes. The invention may be applied to a lamp which is formed so as to lie on a curved surface in such manner that any two straight portions of the discharge are parallel to each other and to the axis of the said surface.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE407565X | 1932-05-23 |
Publications (1)
Publication Number | Publication Date |
---|---|
GB407565A true GB407565A (en) | 1934-03-22 |
Family
ID=6422188
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB14759/33A Expired GB407565A (en) | 1932-05-23 | 1933-05-22 | Improvements in luminous electric discharge lamps |
Country Status (3)
Country | Link |
---|---|
FR (1) | FR755358A (en) |
GB (1) | GB407565A (en) |
NL (1) | NL35713C (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB2195047A (en) * | 1986-08-13 | 1988-03-23 | Canon Kk | Electronic flash device for camera |
GB2217515A (en) * | 1988-03-25 | 1989-10-25 | Toshiba Lighting & Technology | "Flat-surfaced fluorescent lamp" |
-
0
- NL NL35713D patent/NL35713C/xx active
-
1933
- 1933-05-10 FR FR755358D patent/FR755358A/en not_active Expired
- 1933-05-22 GB GB14759/33A patent/GB407565A/en not_active Expired
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB2195047A (en) * | 1986-08-13 | 1988-03-23 | Canon Kk | Electronic flash device for camera |
US4941070A (en) * | 1986-08-13 | 1990-07-10 | Canon Kabushiki Kaisha | Flash device for a camera |
GB2195047B (en) * | 1986-08-13 | 1991-04-17 | Canon Kk | Flash device for camera |
GB2217515A (en) * | 1988-03-25 | 1989-10-25 | Toshiba Lighting & Technology | "Flat-surfaced fluorescent lamp" |
Also Published As
Publication number | Publication date |
---|---|
FR755358A (en) | 1933-11-23 |
NL35713C (en) |
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