GB866466A - Improvements in or relating to electric discharge lamps - Google Patents
Improvements in or relating to electric discharge lampsInfo
- Publication number
- GB866466A GB866466A GB19049/59A GB1904959A GB866466A GB 866466 A GB866466 A GB 866466A GB 19049/59 A GB19049/59 A GB 19049/59A GB 1904959 A GB1904959 A GB 1904959A GB 866466 A GB866466 A GB 866466A
- Authority
- GB
- United Kingdom
- Prior art keywords
- electrode
- coiled
- coated
- coating
- argon
- 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
Landscapes
- Discharge Lamp (AREA)
Abstract
866,466. Discharge lamps. SYLVANIA ELECTRIC PRODUCTS Inc. June 3, 1959 [June 18, 1958(2)], No. 19049/59. Class 39(1). A fluorescent electric discharge lamp includes two lead-in wires which support between them a coiled refractory wire electrode the central region of which has an electronemissive coating and the regions between this coating and the supports are coated with an insulating, refractory, firmly adhering material. The lead-in wires, of the preferred embodiment, support in addition to the cathode auxiliary anodes and a nickel shielding member, the latter being disposed between the coiled electrode and a stem press in the end of a glass envelope. The dimensions of the various elements are fully discussed. The electrode may be of the coiled-coiled-coil type, at least at its central portion. Suitable coatings of the oxides of strontium, calcium and barium with a small proportion of zirconium oxide are placed on the central portion 12, of the electrode, the parts 10, 11 being coated with insulating material such as the oxides of aluminium or titanium. The emissive layer preferably partially overlaps the insulating layer. The support rods may be housed in ceramic tubes except at the points when the rods are joined to the various electrodes. The tube may have a gas filling of 80% neon and 20% Argon, at about 1 mm. of mercury total pressure and the tube may contain sufficient mercury to yield an operating partial pressure of at least 10 microns, or the filling may comprise 15% helium and 85% argon. The electrode may be used in a purely Argon filled lamp, which does not have the auxiliary anodes, and the gas pressure may be 1 mm. of Hg. The alumina or titania is coated on to electrode by sintering at 1100‹C. or 1700‹C. respectively or by a cataphoretic method that part of the coil in which the coating is not required being temporarily coated in wax. The wax is removed and the emissive layer is then applied. Specification 863,724 and U.S.A. Specification 2,771,589 are referred to.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US742928A US2961566A (en) | 1958-06-18 | 1958-06-18 | Fluorescent lamp |
Publications (1)
Publication Number | Publication Date |
---|---|
GB866466A true GB866466A (en) | 1961-04-26 |
Family
ID=24986818
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB19049/59A Expired GB866466A (en) | 1958-06-18 | 1959-06-03 | Improvements in or relating to electric discharge lamps |
Country Status (2)
Country | Link |
---|---|
US (1) | US2961566A (en) |
GB (1) | GB866466A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE1254764B (en) * | 1961-07-24 | 1967-11-23 | Ulrich W Doering | Fluorescent tube lamp filled with noble gas and an addition of mercury vapor |
Families Citing this family (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
NL280093A (en) * | 1961-06-23 | |||
DE2732060C2 (en) * | 1976-07-19 | 1986-06-12 | Thorn Emi Ltd., London | Electric fluorescent lamp |
US5146135A (en) * | 1990-10-17 | 1992-09-08 | Gte Products Corporation | Glow discharge lamp having anode probes |
ITMI20012389A1 (en) * | 2001-11-12 | 2003-05-12 | Getters Spa | CABLE CATHODE WITH INTEGRATED GETTER FOR DISCHARGE LAMPS AND METHODS FOR ITS REALIZATION |
Family Cites Families (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2682008A (en) * | 1950-11-25 | 1954-06-22 | Hanovia Chemical & Mfg Co | Seal stem for electric discharge devices |
BE510237A (en) * | 1951-03-29 |
-
1958
- 1958-06-18 US US742928A patent/US2961566A/en not_active Expired - Lifetime
-
1959
- 1959-06-03 GB GB19049/59A patent/GB866466A/en not_active Expired
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE1254764B (en) * | 1961-07-24 | 1967-11-23 | Ulrich W Doering | Fluorescent tube lamp filled with noble gas and an addition of mercury vapor |
Also Published As
Publication number | Publication date |
---|---|
US2961566A (en) | 1960-11-22 |
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