GB491287A - Improvements in secondary electron emitting electrodes suitable for electron discharge devices - Google Patents

Improvements in secondary electron emitting electrodes suitable for electron discharge devices

Info

Publication number
GB491287A
GB491287A GB578/38A GB57838A GB491287A GB 491287 A GB491287 A GB 491287A GB 578/38 A GB578/38 A GB 578/38A GB 57838 A GB57838 A GB 57838A GB 491287 A GB491287 A GB 491287A
Authority
GB
United Kingdom
Prior art keywords
electrode
electron
borate
jan
conductive base
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
GB578/38A
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.)
Marconis Wireless Telegraph Co Ltd
BAE Systems Electronics Ltd
Original Assignee
Marconis Wireless Telegraph Co Ltd
Marconi Co 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 Marconis Wireless Telegraph Co Ltd, Marconi Co Ltd filed Critical Marconis Wireless Telegraph Co Ltd
Publication of GB491287A publication Critical patent/GB491287A/en
Expired legal-status Critical Current

Links

Classifications

    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01JELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J1/00Details 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
    • H01J1/02Main electrodes
    • H01J1/32Secondary-electron-emitting electrodes

Landscapes

  • Discharge Lamp (AREA)
  • Solid Thermionic Cathode (AREA)
  • Gas-Filled Discharge Tubes (AREA)

Abstract

491,287. Electrode materials. MARCONI'S WIRELESS TELEGRAPH CO., Ltd. Jan. 7, 1938, No. 578. Convention date, Jan. 30, 1937. Drawings to Specification. [Class 39 (i)] A secondary-electron-emitting electrode comprises a conductive base, for example of nickel, aluminium, silver, copper or alloys thereof, carrying a thin layer of an insulating derivative of an alkaline-earth metal, particularly the borate, on which is deposited an electron emissive layer, preferably an alkali-metal such as caesium or its oxide. The layers are prefer. ably not greater than À001 inch. The electrode exhibits the thin film field emission phenomenon of Malter. The borate is evaporated onto the conductive base from a heated filament. The Specification as open to inspection under Sect. 91 includes a Figure of a single stage multiplier to which the electrode is applied. This subject-matter does not appear in the Specification as accepted.
GB578/38A 1937-01-30 1938-01-07 Improvements in secondary electron emitting electrodes suitable for electron discharge devices Expired GB491287A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US123203A US2147669A (en) 1937-01-30 1937-01-30 Secondary electron emitting electrode

Publications (1)

Publication Number Publication Date
GB491287A true GB491287A (en) 1938-08-30

Family

ID=22407273

Family Applications (1)

Application Number Title Priority Date Filing Date
GB578/38A Expired GB491287A (en) 1937-01-30 1938-01-07 Improvements in secondary electron emitting electrodes suitable for electron discharge devices

Country Status (6)

Country Link
US (1) US2147669A (en)
BE (1) BE426040A (en)
CH (1) CH204059A (en)
DE (1) DE750047C (en)
GB (1) GB491287A (en)
NL (1) NL51148C (en)

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2443324A (en) * 1942-11-07 1948-06-15 Charles Schiffman Electronic tube
US2428289A (en) * 1942-11-07 1947-09-30 Charles Schiffman Electron tube coating
US2527981A (en) * 1945-08-23 1950-10-31 Bramley Jenny Secondary-electron emission
US2639963A (en) * 1948-04-05 1953-05-26 Sylvania Electric Prod Secondary emitter and method of manufacture
US2530946A (en) * 1949-04-02 1950-11-21 Bell Telephone Labor Inc Secondary electron emitter
US2846338A (en) * 1954-08-03 1958-08-05 William G Shepherd Secondary electron emitter
US4047999A (en) * 1974-09-19 1977-09-13 Francis John Salgo Method of making a mobile ion film memory

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
BE356578A (en) * 1927-12-14
US2141322A (en) * 1935-06-25 1938-12-27 Rca Corp Cascaded secondary electron emitter amplifier

Also Published As

Publication number Publication date
US2147669A (en) 1939-02-21
CH204059A (en) 1939-04-15
DE750047C (en) 1944-12-11
BE426040A (en)
NL51148C (en)

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