GB517643A - Improvements in electric discharge tubes utilising secondary emission - Google Patents

Improvements in electric discharge tubes utilising secondary emission

Info

Publication number
GB517643A
GB517643A GB23076/38A GB2307638A GB517643A GB 517643 A GB517643 A GB 517643A GB 23076/38 A GB23076/38 A GB 23076/38A GB 2307638 A GB2307638 A GB 2307638A GB 517643 A GB517643 A GB 517643A
Authority
GB
United Kingdom
Prior art keywords
caesium
compound
electric discharge
discharge tubes
secondary emission
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
GB23076/38A
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.)
Koninklijke Philips NV
Original Assignee
Philips Gloeilampenfabrieken NV
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 Gloeilampenfabrieken NV filed Critical Philips Gloeilampenfabrieken NV
Publication of GB517643A publication Critical patent/GB517643A/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
    • H01J1/32—Secondary-electron-emitting electrodes

Landscapes

  • Discharge Lamp (AREA)

Abstract

517,643. Electron multipliers. NAAMLOOZE VENNOOTSCHAP PHILIPS GLOEILAMPENFABRIEKEN. Aug. 4, 1938, No. 23076. Convention date, Aug. 7, 1937. [Class 39 (i)] In a secondary-emitting electrode-the surface of which is of caesium or other alkali metal compound-a material, other than an oxide, is placed under this caesium or compound so that during operation if the compound is reduced by bombardment, for example, and the metal caesium &c. produced, this metal will combine with the underlying material thereby preventing volatilization of the caesium on to other parts of the multiplier. The material may be silver chloride, molybdenum sulphide, sulphur-iron, lead or tin.
GB23076/38A 1937-08-07 1938-08-04 Improvements in electric discharge tubes utilising secondary emission Expired GB517643A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
NL83688A NL50865C (en) 1937-08-07 1937-08-07

Publications (1)

Publication Number Publication Date
GB517643A true GB517643A (en) 1940-02-05

Family

ID=43795021

Family Applications (1)

Application Number Title Priority Date Filing Date
GB23076/38A Expired GB517643A (en) 1937-08-07 1938-08-04 Improvements in electric discharge tubes utilising secondary emission

Country Status (6)

Country Link
BE (1) BE429565A (en)
CH (1) CH208433A (en)
DE (1) DE756219C (en)
FR (1) FR841800A (en)
GB (1) GB517643A (en)
NL (1) NL50865C (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2585534A (en) * 1945-11-07 1952-02-12 Emi Ltd Secondary electron emissive electrode and its method of making

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2585534A (en) * 1945-11-07 1952-02-12 Emi Ltd Secondary electron emissive electrode and its method of making

Also Published As

Publication number Publication date
NL50865C (en) 1941-08-16
DE756219C (en) 1944-10-05
FR841800A (en) 1939-05-26
BE429565A (en)
CH208433A (en) 1940-01-31

Similar Documents

Publication Publication Date Title
GB441250A (en) Improvements in and relating to oxide coated cathodes for gaseous electric discharge devices
GB517643A (en) Improvements in electric discharge tubes utilising secondary emission
GB478024A (en) Improvements in or relating to thermionic cathodes for high pressure metal vapour discharge devices
US2162391A (en) Electron tube with high ohmic wall coatings
GB496556A (en) Improvements in electrodes for electron discharge devices
GB498577A (en) Improved circuit arrangement comprising a discharge tube
US2189971A (en) Secondary electron emitting electrode
GB517743A (en) Improvements in electric discharge tubes comprising secondaryemission electrodes
GB492025A (en) Improved method of manufacturing secondary-emission electrodes
GB835688A (en) Improvements in or relating to cathode-ray tubes for colour-reproduction
GB629881A (en) Improvements in electric discharge tubes comprising secondary emission electrodes
GB449230A (en) Improvements in or relating to electrodes having photo-electric emission properties
GB490652A (en) Improvements in or relating to electric discharge tubes
GB479733A (en) Improvements in or relating to the manufacture of activated electrodes for photo-electric cells or secondary electron multipliers
GB489130A (en) Improvements in secondary emission electron multipliers
GB216840A (en)
US2284655A (en) Electric discharge tube
GB498566A (en) Improvements in electron multipliers
GB379893A (en) Improvements in or relating to photo-electric devices
GB526731A (en) Improvements in secondary emissive electrodes
GB479978A (en) Improvements in secondary emission electron multipliers
GB574237A (en) Improvements in or relating to electron multipliers and methods of manufacturing such multipliers
GB269341A (en) Improvements in or relating to the manufacture of oxide cathodes for discharge tubes
GB502321A (en) Improvements in electric discharge tubes
GB376107A (en) Improved electrode system formed by two electrodes consisting of different materialsand separated by an intermediate layer of a third material