GB566300A - Improvements in and relating to electric discharge devices - Google Patents
Improvements in and relating to electric discharge devicesInfo
- Publication number
- GB566300A GB566300A GB6140/43A GB614043A GB566300A GB 566300 A GB566300 A GB 566300A GB 6140/43 A GB6140/43 A GB 6140/43A GB 614043 A GB614043 A GB 614043A GB 566300 A GB566300 A GB 566300A
- Authority
- GB
- United Kingdom
- Prior art keywords
- disc
- starting
- april
- envelope
- discharge
- 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
- H01J61/06—Main electrodes
- H01J61/067—Main electrodes for low-pressure discharge lamps
- H01J61/0672—Main electrodes for low-pressure discharge lamps characterised by the construction of the electrode
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10S315/00—Electric lamp and discharge devices: systems
- Y10S315/05—Starting and operating circuit for fluorescent lamp
Landscapes
- Discharge Lamps And Accessories Thereof (AREA)
- Discharge Lamp (AREA)
Abstract
566,300. Discharge lamps. BRITISH THOMSON-HOUSTON CO., Ltd. April 16, 1943, No. 6140. Convention date, April 21, 1942. [Class 39 (i)] In a cold starting positive column discharge device having an envelope 15 containing an ionizable atmosphere, the electrode which functions as a cathode comprises a member 21 so fine as to be heated to effective emission by the discharge and a disc 22 electrically connected to member 21, mounted in front thereof and obstructing at least 50 per cent of the crosssection of the envelope where it is located. This disc 22 avoids any substantial sputtering from member 21 in starting and, if the disc is situated within the volume normally occupied by the Faraday dark space, this space is reduced in dimensions. The illuminating power of the device is thus increased. The disc 22 may be divided into two halves, each connected to an opposite end of member 21. This ensures that member 21 is heated during starting by current passing therethrough to a portion of disc 22, whereas there is also a portion of disc 22 in direct contact with the mains to function as an anode when the current alternates. Member 21 may be of 2.55 mil. tungsten wire and disc 22 may be of nickel 20 mils. thick. Both may be activated by refractory oxides. Specification 542,853 is referred to.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US439896A US2351616A (en) | 1942-04-21 | 1942-04-21 | Electric discharge device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB566300A true GB566300A (en) | 1944-12-21 |
Family
ID=23746578
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB6140/43A Expired GB566300A (en) | 1942-04-21 | 1943-04-16 | Improvements in and relating to electric discharge devices |
Country Status (4)
| Country | Link |
|---|---|
| US (1) | US2351616A (en) |
| ES (1) | ES178779A1 (en) |
| FR (1) | FR961336A (en) |
| GB (1) | GB566300A (en) |
Families Citing this family (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| NL59720C (en) * | 1942-06-16 | |||
| US2464643A (en) * | 1945-04-05 | 1949-03-15 | Eugene R Kulka | Holder for gaseous discharge lamps |
| US2512282A (en) * | 1945-08-17 | 1950-06-20 | Gen Electric | Electric discharge lamp |
| US2446152A (en) * | 1946-05-29 | 1948-07-27 | Sylvania Electric Prod | Electrical apparatus for gaseous discharge devices |
| US2561898A (en) * | 1948-05-13 | 1951-07-24 | Gen Electric | Electric discharge lamp |
| DE966001C (en) * | 1950-05-20 | 1957-07-04 | Pintsch Electro G M B H | Vapor and / or gas-filled discharge lamp, in particular fluorescent tubes |
| US2757318A (en) * | 1953-05-18 | 1956-07-31 | Gen Electric | Rectifying circuit for discharge lamps |
| US3039022A (en) * | 1954-11-05 | 1962-06-12 | Arcy Ellis W D | Motion picture projector |
-
0
- FR FR961336D patent/FR961336A/fr not_active Expired
-
1942
- 1942-04-21 US US439896A patent/US2351616A/en not_active Expired - Lifetime
-
1943
- 1943-04-16 GB GB6140/43A patent/GB566300A/en not_active Expired
-
1947
- 1947-07-04 ES ES0178779A patent/ES178779A1/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| US2351616A (en) | 1944-06-20 |
| FR961336A (en) | 1950-05-10 |
| ES178779A1 (en) | 1947-09-01 |
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