GB319650A - Improvements relating to photo-electric cells - Google Patents

Improvements relating to photo-electric cells

Info

Publication number
GB319650A
GB319650A GB6325/29A GB632529A GB319650A GB 319650 A GB319650 A GB 319650A GB 6325/29 A GB6325/29 A GB 6325/29A GB 632529 A GB632529 A GB 632529A GB 319650 A GB319650 A GB 319650A
Authority
GB
United Kingdom
Prior art keywords
substratum
caesium
compound
volatilization
anode
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
GB6325/29A
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 GB319650A publication Critical patent/GB319650A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J40/00—Photoelectric discharge tubes not involving the ionisation of a gas
    • H01J40/02—Details
    • H01J40/04—Electrodes
    • H01J40/06—Photo-emissive cathodes

Landscapes

  • Manufacture Of Electron Tubes, Discharge Lamp Vessels, Lead-In Wires, And The Like (AREA)

Abstract

319,650. Naamlooze Vennootschap Philips' Gloeilampenfabrieken. Sept. 25, 1928, [Convention date]. Vacuum tubes. - A lightsensitive electrode has a layer consisting of a chemical compound interposed between the light-sensitive material, such as caesium or other alkali metal, and a substratum which may be the support. The compound is preferably of a metal which is not present in the substratum, and may consist of a halide, such as calcium fluoride, or an oxide such as magnesia, or it may be obtained by etching a substratum of glass; the compound should absorb caesium &c. better than does the material of the substratum. It may be applied by spraying, painting, or by volatilization from an anode 6, which is coated with the compound and heated by passage of current. The anode may be in the shape of a nearly closed ring. Caesium &c. is admitted by volatilization through a side tube 9. The intermediate layer may be chosen so as to control the sensitiveness of the cell to light of different colour; for example caesium applied to calcium fluoride appears blue, but when applied to sodium bromide it appears green. Specifications 303,476, 306,996, 309,224 and 323,718 are referred to.
GB6325/29A 1928-09-25 1929-02-26 Improvements relating to photo-electric cells Expired GB319650A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
NL319650X 1928-09-25
NL710006X 1928-09-25

Publications (1)

Publication Number Publication Date
GB319650A true GB319650A (en) 1930-05-26

Family

ID=26643647

Family Applications (1)

Application Number Title Priority Date Filing Date
GB6325/29A Expired GB319650A (en) 1928-09-25 1929-02-26 Improvements relating to photo-electric cells

Country Status (1)

Country Link
GB (1) GB319650A (en)

Similar Documents

Publication Publication Date Title
GB465060A (en) Improvements in and relating to cathode ray tube television transmitting apparatus
GB1163499A (en) Method of Making a Multi-Alkali Photo-Cathode
US2189322A (en) Photoelectric cathode
GB534343A (en) Improvements in and relating to photo-sensitive electrode structures
GB319650A (en) Improvements relating to photo-electric cells
US2401737A (en) Phototube and method of manufacture
US2702259A (en) Manufacture of electrodes which are sensitized so as to be emitters of photoelectrons or secondary electrons
GB496556A (en) Improvements in electrodes for electron discharge devices
GB353394A (en) Improvements in light sensitive electric discharge devices
GB522774A (en) Improvements in or relating to methods of manufacturing secondary emitting electrodes
GB1453965A (en) Electron-emissive cathodes
GB362838A (en) Improvements in or relating to photo-electric cells
US2401735A (en) Method of manufacturing photoelectric tubes
US1962895A (en) Photo-electric tube
GB487921A (en) Improvements in or relating to photosensitive surfaces
US2413222A (en) Photoelectric tube and method of manufacture
GB454146A (en) Improvements in photo-electric cells
GB347660A (en) Improvements in or relating to photo-electric cells
GB375639A (en) Improvements in or relating to photo-electric cells
GB430224A (en) Improvements relating to the manufacture of electron emitting electrodes for electron discharge tubes
GB375614A (en) Improvements in or relating to photo-electric cells
GB379893A (en) Improvements in or relating to photo-electric devices
GB632962A (en) Improvements in or relating to photo-electric cells
GB373867A (en) Improvements in or relating to photo-electric cells
GB436023A (en) Improvements in the manufacture of photo-electric cells