GB777142A - Improvements in or relating to cathode bodies for use in electric discharge tubes - Google Patents
Improvements in or relating to cathode bodies for use in electric discharge tubesInfo
- Publication number
- GB777142A GB777142A GB33173/54A GB3317354A GB777142A GB 777142 A GB777142 A GB 777142A GB 33173/54 A GB33173/54 A GB 33173/54A GB 3317354 A GB3317354 A GB 3317354A GB 777142 A GB777142 A GB 777142A
- Authority
- GB
- United Kingdom
- Prior art keywords
- porous
- cathode
- emissive material
- nov
- emissive
- 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
- H01J1/00—Details of electrodes, of magnetic control means, of screens, or of the mounting or spacing thereof, common to two or more basic types of discharge tubes or lamps
- H01J1/02—Main electrodes
- H01J1/13—Solid thermionic cathodes
- H01J1/20—Cathodes heated indirectly by an electric current; Cathodes heated by electron or ion bombardment
- H01J1/28—Dispenser-type cathodes, e.g. L-cathode
Landscapes
- Solid Thermionic Cathode (AREA)
- Powder Metallurgy (AREA)
- Discharge Lamp (AREA)
Abstract
777,142. Cathode materials. PHILIPS ELECTRICAL INDUSTRIES, Ltd. Nov. 16, 1954 [Nov. 18, 1953], No. 33173/54. Drawings to Specification. Class 39(1). A porous or dispenser cathode is provided with a supply of alkaline-earth material comprising a compound of barium oxide with an oxide of aluminium, beryllium, or silicon, the porous refractory metal consisting of an alloy of two of the following, molybdenum, tungsten, tantalum, niobium, hafnium, and zirconium. The cathode may be of the type having the emissive material in a supply chamber closed by a porous wall, and Table I gives a list of various emissive materials with corresponding suitable alloys, and their proportional constituents. Table II is a similar table for cathodes of the type in which a porous refractory mass is impregnated with the emissive material, or in which the refractory metal is mixed with the emissive material in powder form, and then pressed and sintered. Further tables show experimental results of life tests. Specifications 734,209 and 734,311 are referred to.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US345392XA | 1953-11-18 | 1953-11-18 |
Publications (1)
Publication Number | Publication Date |
---|---|
GB777142A true GB777142A (en) | 1957-06-19 |
Family
ID=21877047
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB33173/54A Expired GB777142A (en) | 1953-11-18 | 1954-11-16 | Improvements in or relating to cathode bodies for use in electric discharge tubes |
Country Status (7)
Country | Link |
---|---|
US (1) | US2899592A (en) |
BE (1) | BE533455A (en) |
CH (1) | CH345392A (en) |
DE (1) | DE1043519B (en) |
FR (1) | FR1113555A (en) |
GB (1) | GB777142A (en) |
NL (1) | NL97571C (en) |
Families Citing this family (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
NL261666A (en) * | 1960-02-25 | |||
US3558966A (en) * | 1967-03-01 | 1971-01-26 | Semicon Associates Inc | Directly heated dispenser cathode |
US3693007A (en) * | 1970-05-25 | 1972-09-19 | Egyesuelt Izzolampa | Oxide cathode for an electric discharge device |
US4417173A (en) * | 1980-12-09 | 1983-11-22 | E M I-Varian Limited | Thermionic electron emitters and methods of making them |
Family Cites Families (15)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US1954474A (en) * | 1927-05-20 | 1934-04-10 | Espe Werner | Glow cathode |
US2085605A (en) * | 1934-05-11 | 1937-06-29 | Gen Electric | Thermionic cathode for electric discharge devices |
US2121589A (en) * | 1934-06-28 | 1938-06-21 | Westinghouse Electric & Mfg Co | Emissive incandescent cathode |
DE707255C (en) * | 1936-09-21 | 1941-06-17 | Siemens Schuckertwerke Akt Ges | High-performance glow cathode, especially for gas or vapor-filled discharge vessels |
US2147447A (en) * | 1936-09-21 | 1939-02-14 | Siemens Ag | Glow cathode |
US2180988A (en) * | 1937-06-16 | 1939-11-21 | Gen Electric | Electrode for electric discharge devices |
US2389060A (en) * | 1943-08-13 | 1945-11-13 | Callite Tungsten Corp | Refractory body of high electronic emission |
US2473550A (en) * | 1947-08-19 | 1949-06-21 | Raytheon Mfg Co | Directly heated cathode |
BE486002A (en) * | 1947-11-26 | |||
BE498869A (en) * | 1949-10-25 | |||
US2741717A (en) * | 1951-06-14 | 1956-04-10 | Siemens Ag | Dispenser type cathode having gettercoated parts |
DE895479C (en) * | 1951-11-20 | 1953-11-02 | Siemens Ag | Cathode for electrical discharge vessels |
NL91131C (en) * | 1951-11-29 | |||
NL91132C (en) * | 1951-11-29 | |||
BE517981A (en) * | 1952-02-27 |
-
0
- NL NL97571D patent/NL97571C/xx active
- US US2899592D patent/US2899592A/en not_active Expired - Lifetime
- BE BE533455D patent/BE533455A/xx unknown
-
1954
- 1954-11-15 DE DEN9761A patent/DE1043519B/en active Pending
- 1954-11-16 CH CH345392D patent/CH345392A/en unknown
- 1954-11-16 GB GB33173/54A patent/GB777142A/en not_active Expired
- 1954-11-18 FR FR1113555D patent/FR1113555A/en not_active Expired
Also Published As
Publication number | Publication date |
---|---|
DE1043519B (en) | 1958-11-13 |
NL97571C (en) | |
US2899592A (en) | 1959-08-11 |
BE533455A (en) | |
FR1113555A (en) | 1956-03-30 |
CH345392A (en) | 1960-03-31 |
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