GB418027A - Improvements in and relating to gaseous electric discharge devices - Google Patents
Improvements in and relating to gaseous electric discharge devicesInfo
- Publication number
- GB418027A GB418027A GB18738/33A GB1873833A GB418027A GB 418027 A GB418027 A GB 418027A GB 18738/33 A GB18738/33 A GB 18738/33A GB 1873833 A GB1873833 A GB 1873833A GB 418027 A GB418027 A GB 418027A
- Authority
- GB
- United Kingdom
- Prior art keywords
- tube
- cathode
- anode
- barium
- coated
- 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
Landscapes
- Ceramic Products (AREA)
Abstract
418,027. Discharge apparatus. BRITISH THOMSON-HOUSTON CO., Ltd., Crown House, Aldwych, London.- (Assignees of Foulke, T. E. ; 30, Evelyn Place, Nutley, New Jersey, U.S.A.) July 1, 1933, No. 18738. Convention date, July 1, 1932. [Class 39 (i).] A tube contains two main electrodes, one heated to emit electrons, an auxiliary anode adjacent the heated electrode, and a conductor extending from a point near the non- heated electrode to the auxiliary anode, to which it is connected. In one form, a tube 20 contains a cup-shaped anode 21 and a cathode 23 having a heater 24 and heatshields 25, 26, the inner surfaces of which, beyond the cathode are coated with powdered aluminium, or other material resisting activation by sputtered particles. A ring- shaped auxiliary anode 30 is mounted above the cathode on a shielded support 31 and is connected to a bariumcoated conductor 32 extending to a point near anode 21 and having a support 33. The filling may consist of neon, helium, argon, nitrogen, mercury or the like alone or in combination, for example neon with 0À2 per cent of argon at 2 to 4 mms. Specification 395,851 is referred, to. The Specification as open to inspection under Sect. 91 describes also a tube having a cylindrical cathode with an axial rod connected to it through a resistance and terminating near the anode, a tube for use with alternating-current having two such cathodes and auxiliary electrodes, and a tube as shown in the Figure with the member 32 spaced from the ring 30 and with another cathode similar to cathode 21 replacing anode 21. The cathode and the member 32 may in all cases be coated with barium azide which is reduced to barium in the induction furnace. The wire 32 is heated by means of an inductive discharge in the evolved gas, and the furnace is moved along as the gas is evolved, the tube being on the pump. The electrodes are left coated with barium cemented on by barium nitride and a little unreduced azide. Metallic caesium or other alkali metal may then be distilled on from a pellet. Alternatively the electrodes may be coated by the method described in Specification 411,669. The tube may be filled with neon and 0.01 to 1 per cent of argon at a pressure of 1-3 mm. This subject-matter does not appear in the Specification as accepted.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US418027XA | 1932-07-01 | 1932-07-01 |
Publications (1)
Publication Number | Publication Date |
---|---|
GB418027A true GB418027A (en) | 1934-10-17 |
Family
ID=21918395
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB18738/33A Expired GB418027A (en) | 1932-07-01 | 1933-07-01 | Improvements in and relating to gaseous electric discharge devices |
Country Status (1)
Country | Link |
---|---|
GB (1) | GB418027A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE1015927B (en) * | 1953-12-30 | 1957-09-19 | Patra Patent Treuhand | Electric high pressure gas discharge lamp |
-
1933
- 1933-07-01 GB GB18738/33A patent/GB418027A/en not_active Expired
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE1015927B (en) * | 1953-12-30 | 1957-09-19 | Patra Patent Treuhand | Electric high pressure gas discharge lamp |
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