GB380094A - Improvements in electrical discharge tubes - Google Patents
Improvements in electrical discharge tubesInfo
- Publication number
- GB380094A GB380094A GB447331A GB447331A GB380094A GB 380094 A GB380094 A GB 380094A GB 447331 A GB447331 A GB 447331A GB 447331 A GB447331 A GB 447331A GB 380094 A GB380094 A GB 380094A
- Authority
- GB
- United Kingdom
- Prior art keywords
- discharge
- electrodes
- main
- auxiliary
- electrode
- 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
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
- H05B41/00—Circuit arrangements or apparatus for igniting or operating discharge lamps
- H05B41/14—Circuit arrangements
- H05B41/16—Circuit arrangements in which the lamp is fed by dc or by low-frequency ac, e.g. by 50 cycles/sec ac, or with network frequencies
- H05B41/20—Circuit arrangements in which the lamp is fed by dc or by low-frequency ac, e.g. by 50 cycles/sec ac, or with network frequencies having no starting switch
- H05B41/22—Circuit arrangements in which the lamp is fed by dc or by low-frequency ac, e.g. by 50 cycles/sec ac, or with network frequencies having no starting switch for lamps having an auxiliary starting electrode
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
- H01J3/00—Details of electron-optical or ion-optical arrangements or of ion traps common to two or more basic types of discharge tubes or lamps
- H01J3/02—Electron guns
- H01J3/025—Electron guns using a discharge in a gas or a vapour as electron source
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
- H01J2893/00—Discharge tubes and lamps
- H01J2893/0061—Tubes with discharge used as electron source
Abstract
380,094. Discharge apparatus. BRETTMON; J., 226, Rue de Rivoli, Paris. March 12, 1931, No. 4473. [Class 39 (i).] One terminal of a voltage source is connected to a main electrode p, Fig. 1, and the other terminal to one of two auxiliary electrodes e<1>, e<2> of pointed form so spaced that a voltage lower than that applied to the electrode p produces an auxiliary glow discharge between the electrodes e<1>, e<2>. ' The main glow discharge then flows from the electrode p to the middle of the auxiliary discharge, which is continuously maintained during the operation of the tube and is essential for the maintenance of the main discharge. A single voltage source may be used, a resistance r reducing the voltage across the electrodes e<1>, e<2>. The electrode p may be duplicated and the invention may be applied to long luminous tubes. The discharges may be supplied with alternating current by centretapped transformers as in Fig. 6, two main electrodes p, p<1> being provided. The main discharge may pass through a porcelain or other porous insulating tube t, Fig. 3, enclosing the electrodes e<1>, e<2> and canalizing the auxiliary discharge. The tube t may be coated with porous metal oxides o, such as thorium oxide, heated by the auxiliary discharge and liberating electrons. Specification 150,692, [Class 39 (i), Electric lamps, Arc, &c.], is referred to.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB447331A GB380094A (en) | 1931-03-12 | 1931-03-12 | Improvements in electrical discharge tubes |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB447331A GB380094A (en) | 1931-03-12 | 1931-03-12 | Improvements in electrical discharge tubes |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB380094A true GB380094A (en) | 1932-09-12 |
Family
ID=9777831
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB447331A Expired GB380094A (en) | 1931-03-12 | 1931-03-12 | Improvements in electrical discharge tubes |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB380094A (en) |
-
1931
- 1931-03-12 GB GB447331A patent/GB380094A/en not_active Expired
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