GB451353A - Improvements in and relating to electric discharge devices - Google Patents
Improvements in and relating to electric discharge devicesInfo
- Publication number
- GB451353A GB451353A GB152/35A GB15235A GB451353A GB 451353 A GB451353 A GB 451353A GB 152/35 A GB152/35 A GB 152/35A GB 15235 A GB15235 A GB 15235A GB 451353 A GB451353 A GB 451353A
- Authority
- GB
- United Kingdom
- Prior art keywords
- electrode
- arc
- electrodes
- tube
- main
- 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
- H01J61/82—Lamps with high-pressure unconstricted discharge having a cold pressure > 400 Torr
Landscapes
- Discharge Lamp (AREA)
- Discharge Lamps And Accessories Thereof (AREA)
Abstract
451,353. Discharge lamps. BRITISH THOMSON-HOUSTON CO., Ltd., Crown House, Aldwych, London. Jan. 2, 1935, No. 152. Convention date, Jan. 3, 1934. [Class 39 (i)] An enclosed arc lamp contains refractory metal electrodes coated or impregnated with thermionically active material, a heater for raising at least one electrode to operating temperature and a resistance heater as described in Specification 425,597 in the lead to one electrode in series with the arc and having a refractory insulating covering in heat-conductive relation to vaporizable metal. Each main electrode may comprise a refractory ball 16, Fig. 3, projecting towards the other electrode as shown in Fig. 2 and receiving the arc in normal operation, and a tube 13 or disc or cup coated with barium oxide to produce a glow discharge at starting and heated by a winding 21 about the tube 13 or about the central rod 15 supporting the ball 16. The windings 21 of the two main electrodes are connected in series across the arc by a conductor 36 connected to electrode points 431 facilitating starting ; after the arc starts, little current flows through the windings 21. The series resistance 32 in the lead to the lower main electrode is enclosed in a tube 30 of beryllium oxide, thoria, alumina or magnesia. The tube 30 is heated to luminescence and passes through a pool 35 of mercury to raise the vapour pressure in the arc and improve the yield of ultra-violet rays. In modified electrodes, the ball 16 may be omitted and an insulated heater surrounds a refractory metal, cylindrical roll impregnated with thermionic material. In a modified lamp (Figs. 7-10, not shown), an auxiliary starting electrode adjacent either main electrode or between the main electrodes has an internal heater connected through resistances to the two main electrodes. The Specification as open to inspection under Sect. 91 comprises also electrodes of nickelbarium alloy. This subject-matter does not appear in the Specification as accepted.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US618894A US2085530A (en) | 1932-06-23 | 1932-06-23 | Electric arc lamp |
US705048A US2085531A (en) | 1932-06-23 | 1934-01-03 | Electric arc lamp |
Publications (1)
Publication Number | Publication Date |
---|---|
GB451353A true GB451353A (en) | 1936-08-04 |
Family
ID=27088360
Family Applications (2)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB17247/33A Expired GB425597A (en) | 1932-06-23 | 1933-06-16 | Improvements in and relating to electric arc lamps |
GB152/35A Expired GB451353A (en) | 1932-06-23 | 1935-01-02 | Improvements in and relating to electric discharge devices |
Family Applications Before (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB17247/33A Expired GB425597A (en) | 1932-06-23 | 1933-06-16 | Improvements in and relating to electric arc lamps |
Country Status (3)
Country | Link |
---|---|
US (2) | US2085530A (en) |
FR (2) | FR757070A (en) |
GB (2) | GB425597A (en) |
Families Citing this family (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2491881A (en) * | 1944-02-26 | 1949-12-20 | Gen Electric | Darkroom lamp |
US2650321A (en) * | 1946-12-18 | 1953-08-25 | Gen Electric | Lamp unit and support structure therefor |
US3396303A (en) * | 1966-03-21 | 1968-08-06 | Nasa Usa | Arc electrode of graphite with ball tip |
US5834899A (en) * | 1996-10-16 | 1998-11-10 | Tapeswitch Corporation Of America | Fluorescent apparatus and method employing low-frequency excitation into a conductive-resistive inductive medium |
CN113260099B (en) * | 2021-07-15 | 2021-09-28 | 南通兴胜灯具制造有限公司 | Electric heating type blast lamp |
-
1932
- 1932-06-23 US US618894A patent/US2085530A/en not_active Expired - Lifetime
-
1933
- 1933-06-16 GB GB17247/33A patent/GB425597A/en not_active Expired
- 1933-06-16 FR FR757070D patent/FR757070A/en not_active Expired
-
1934
- 1934-01-03 US US705048A patent/US2085531A/en not_active Expired - Lifetime
-
1935
- 1935-01-02 GB GB152/35A patent/GB451353A/en not_active Expired
- 1935-01-03 FR FR45736D patent/FR45736E/en not_active Expired
Also Published As
Publication number | Publication date |
---|---|
GB425597A (en) | 1935-03-18 |
US2085531A (en) | 1937-06-29 |
FR45736E (en) | 1935-11-18 |
US2085530A (en) | 1937-06-29 |
FR757070A (en) | 1933-12-19 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
US3906272A (en) | Low wattage high pressure sodium vapor lamps | |
US2020737A (en) | Gaseous electric discharge arc lamp | |
US2765420A (en) | Lamp electrode | |
GB451353A (en) | Improvements in and relating to electric discharge devices | |
GB311282A (en) | Improvements in and relating to electric discharge devices | |
GB448706A (en) | Improvements in and relating to electric discharge lamps | |
GB346957A (en) | Improvements in and relating to electron discharge devices | |
US2273450A (en) | High pressure metal vapor lamp | |
US2906905A (en) | Fluorescent lamp | |
US2156369A (en) | High pressure arc lamp | |
US1989786A (en) | Base and based electric device | |
GB375851A (en) | Improvements in and relating to electric discharge devices | |
US2006466A (en) | Mercury vapor lamp | |
US2103028A (en) | Electric conduction device | |
US2103034A (en) | Gaseous and vapor electric discharge device | |
US2205000A (en) | Electric lamp | |
US2930934A (en) | Discharge lamp | |
US2087747A (en) | Thermionic discharge device | |
US2199956A (en) | Mercury vapor glow lamp | |
US2040753A (en) | Electric ray producing device | |
US2445678A (en) | Electric discharge device | |
US2042136A (en) | Gaseous electric discharge device | |
GB469631A (en) | Improvements in gas or vapour-filled electric discharge tubes and in devices comprising such tubes | |
US1529323A (en) | Closed arc lamp | |
US1984468A (en) | Gaseous electric discharge device |