GB311282A - Improvements in and relating to electric discharge devices - Google Patents
Improvements in and relating to electric discharge devicesInfo
- Publication number
- GB311282A GB311282A GB14209/29A GB1420929A GB311282A GB 311282 A GB311282 A GB 311282A GB 14209/29 A GB14209/29 A GB 14209/29A GB 1420929 A GB1420929 A GB 1420929A GB 311282 A GB311282 A GB 311282A
- Authority
- GB
- United Kingdom
- Prior art keywords
- discharge
- oxide
- zirconium
- heating
- resistance
- 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
- H01J61/70—Lamps with low-pressure unconstricted discharge having a cold pressure < 400 Torr
Landscapes
- Gas-Filled Discharge Tubes (AREA)
- Circuit Arrangements For Discharge Lamps (AREA)
Abstract
311,282. Spanner, H. J., and D÷ring, U. May 8, 1928, [Convention date]. Drawings to Specification. Vacuum tubes.-In a gas discharge device such as a lamp, the cathode consists of a capsule or shell containing an auxiliary electrode and resistance material, such as a mixture of carbon or the material known by the registered Trade Mark Carborundum and oxides of zirconium or beryllium, a heating current being passed through the resistance. The discharge and heating circuits may be connected in parallel or in series, and the current through the heating circuit may be opened by hand or electromagnetically, when the full discharge has started. A resistance may be connected in series with the heating circuit. Two or more cathodes may be disposed in chambers offset from the main path of the discharge so as to provide an extended source of light. The envelope may be of glass or of quartz or other material transparent to ultra-violet rays, or the glass may contain, or be covered with, fluorescent or coloured material. The cathode is preferably coated with barium, strontium, caesium, or rubidium, for example in the form of oxide, and associated with an amphoteric oxide such as zirconium, aluminium, chromium, nickel or copper oxide. The filling may be neon with iodine or bromine. The Specification as open to inspection under Sect. 91 (3) (a) comprises also a device having a cathode heated by a glow discharge from an internal electrode, or by an internal heating element consisting of a tungsten coil wound in grooves on a tubular support of sintered zirconium, aluminium, magnesium or beryllium oxide. This subject-matter does not appear in the Specification as accepted.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE2128270X | 1928-04-30 | ||
DE311282X | 1928-05-08 |
Publications (1)
Publication Number | Publication Date |
---|---|
GB311282A true GB311282A (en) | 1930-08-07 |
Family
ID=32043838
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB14209/29A Expired GB311282A (en) | 1928-04-30 | 1929-05-07 | Improvements in and relating to electric discharge devices |
Country Status (3)
Country | Link |
---|---|
US (1) | US2128270A (en) |
FR (1) | FR674309A (en) |
GB (1) | GB311282A (en) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2668259A (en) * | 1950-02-16 | 1954-02-02 | Raytheon Mfg Co | Electrical circuit |
US2770749A (en) * | 1952-08-21 | 1956-11-13 | Hartford Nat Bank & Trust Co | Cathode-ray tube comprising a luminescent screen |
GB2492854A (en) * | 2011-07-13 | 2013-01-16 | Sang Il System Co Ltd | Cold cathode fluorescent lamp for illumination |
Families Citing this family (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2496374A (en) * | 1943-11-24 | 1950-02-07 | Boucher And Keiser Company | Tubular electric lamp |
US2671184A (en) * | 1949-12-01 | 1954-03-02 | Gen Electric | Flashing discharge device |
US2788452A (en) * | 1952-07-29 | 1957-04-09 | Ernest J Sternglass | Thermal image detecting tube |
NL269971A (en) * | 1960-10-18 | |||
US3249788A (en) * | 1961-11-08 | 1966-05-03 | Westinghouse Electric Corp | Electrode coating material and discharge device |
US3959524A (en) * | 1974-03-25 | 1976-05-25 | Gte Sylvania Incorporated | Metal halide discharge lamp having heat reflective coating |
US5022883A (en) * | 1990-11-06 | 1991-06-11 | The United States Of America As Represented By The Secretary Of The Army | Method of making a long life high current density cathode from aluminum oxide and tungsten oxide powders |
JP3400489B2 (en) * | 1993-05-20 | 2003-04-28 | 東京電測株式会社 | Composite discharge lamp |
US20200113020A1 (en) * | 2018-10-05 | 2020-04-09 | Serendipity Technologies Llc | Low power high-efficiency heating element |
-
1929
- 1929-03-30 US US351368A patent/US2128270A/en not_active Expired - Lifetime
- 1929-04-30 FR FR674309D patent/FR674309A/en not_active Expired
- 1929-05-07 GB GB14209/29A patent/GB311282A/en not_active Expired
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2668259A (en) * | 1950-02-16 | 1954-02-02 | Raytheon Mfg Co | Electrical circuit |
US2770749A (en) * | 1952-08-21 | 1956-11-13 | Hartford Nat Bank & Trust Co | Cathode-ray tube comprising a luminescent screen |
GB2492854A (en) * | 2011-07-13 | 2013-01-16 | Sang Il System Co Ltd | Cold cathode fluorescent lamp for illumination |
Also Published As
Publication number | Publication date |
---|---|
US2128270A (en) | 1938-08-30 |
FR674309A (en) | 1930-01-27 |
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