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 tubes

Info

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
Application number
GB33173/54A
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Philips Electrical Industries Ltd
Original Assignee
Philips Electrical Industries Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Philips Electrical Industries Ltd filed Critical Philips Electrical Industries Ltd
Publication of GB777142A publication Critical patent/GB777142A/en
Expired legal-status Critical Current

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)
  • Discharge Lamp (AREA)
  • Powder Metallurgy (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.
GB33173/54A 1953-11-18 1954-11-16 Improvements in or relating to cathode bodies for use in electric discharge tubes Expired GB777142A (en)

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)

* Cited by examiner, † Cited by third party
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)

* Cited by examiner, † Cited by third party
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
NL69486C (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
NL91132C (en) * 1951-11-29
NL174029B (en) * 1951-11-29 Joseph Salim Peress HOLLOW ARTICLES FOR FOR EXAMPLE A DIVING SUIT.
NL96177C (en) * 1952-02-27

Also Published As

Publication number Publication date
BE533455A (en)
NL97571C (en)
DE1043519B (en) 1958-11-13
US2899592A (en) 1959-08-11
FR1113555A (en) 1956-03-30
CH345392A (en) 1960-03-31

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