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GB700313A - Improvements in or relating to electrodes for electrical discharge apparatus - Google Patents

Improvements in or relating to electrodes for electrical discharge apparatus

Info

Publication number
GB700313A
GB700313A GB196051A GB196051A GB700313A GB 700313 A GB700313 A GB 700313A GB 196051 A GB196051 A GB 196051A GB 196051 A GB196051 A GB 196051A GB 700313 A GB700313 A GB 700313A
Authority
GB
United Kingdom
Prior art keywords
relating
electrodes
electrical discharge
discharge apparatus
pellet
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
GB196051A
Inventor
William Rule
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.)
Crompton Parkinson Ltd
Original Assignee
Crompton Parkinson 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 Crompton Parkinson Ltd filed Critical Crompton Parkinson Ltd
Priority to GB196051A priority Critical patent/GB700313A/en
Publication of GB700313A publication Critical patent/GB700313A/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
    • H01J1/14—Solid thermionic cathodes characterised by the material
    • H01J1/142—Solid thermionic cathodes characterised by the material with alkaline-earth metal oxides, or such oxides used in conjunction with reducing agents, as an emissive material
    • 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
    • H01J61/0675—Main electrodes for low-pressure discharge lamps characterised by the material of the electrode
    • H01J61/0677—Main electrodes for low-pressure discharge lamps characterised by the material of the electrode characterised by the electron emissive material

Landscapes

  • Discharge Lamp (AREA)

Abstract

700,313. Cathode materials and processing. CROMPTON PARKINSON, Ltd. Jan. 15, 1952 [Jan. 25, 1951], No. 1960/51. Class 39(1) An electron-emitting surface contains not more than 10 per cent, preferably 6-8 per cent, by weight of the carbonate of the alkaline earth metal contained in the surface. The surface may be applied with a binder, or inserted in the form of a pellet, in a heater coil. The pellet may be formed by heating the material together with a flux such as silica, and the cathode may be used in a cathoderay tube or fluorescent lamp.
GB196051A 1951-01-25 1951-01-25 Improvements in or relating to electrodes for electrical discharge apparatus Expired GB700313A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB196051A GB700313A (en) 1951-01-25 1951-01-25 Improvements in or relating to electrodes for electrical discharge apparatus

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB196051A GB700313A (en) 1951-01-25 1951-01-25 Improvements in or relating to electrodes for electrical discharge apparatus

Publications (1)

Publication Number Publication Date
GB700313A true GB700313A (en) 1953-11-25

Family

ID=9731077

Family Applications (1)

Application Number Title Priority Date Filing Date
GB196051A Expired GB700313A (en) 1951-01-25 1951-01-25 Improvements in or relating to electrodes for electrical discharge apparatus

Country Status (1)

Country Link
GB (1) GB700313A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0841676A1 (en) * 1996-11-12 1998-05-13 Matsushita Electronics Corporation Cathode for electron tube and method for manufacturing the same
US6033280A (en) * 1995-09-21 2000-03-07 Matsushita Electronics Corporation Method for manufacturing emitter for cathode ray tube

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6033280A (en) * 1995-09-21 2000-03-07 Matsushita Electronics Corporation Method for manufacturing emitter for cathode ray tube
US6222308B1 (en) 1995-09-21 2001-04-24 Matsushita Electronics Corporation Emitter material for cathode ray tube having at least one alkaline earth metal carbonate dispersed or concentrated in a mixed crystal or solid solution
EP0841676A1 (en) * 1996-11-12 1998-05-13 Matsushita Electronics Corporation Cathode for electron tube and method for manufacturing the same
US5925976A (en) * 1996-11-12 1999-07-20 Matsushita Electronics Corporation Cathode for electron tube having specific emissive material

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