GB280617A - Improvements in electron-discharge-devices - Google Patents

Improvements in electron-discharge-devices

Info

Publication number
GB280617A
GB280617A GB1802026A GB1802026A GB280617A GB 280617 A GB280617 A GB 280617A GB 1802026 A GB1802026 A GB 1802026A GB 1802026 A GB1802026 A GB 1802026A GB 280617 A GB280617 A GB 280617A
Authority
GB
United Kingdom
Prior art keywords
cathode
positive
electrode
coated
emitting
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
GB1802026A
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.)
British Thomson Houston Co Ltd
Original Assignee
British Thomson Houston 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
Priority to BE343787D priority Critical patent/BE343787A/xx
Application filed by British Thomson Houston Co Ltd filed Critical British Thomson Houston Co Ltd
Priority to GB1802026A priority patent/GB280617A/en
Publication of GB280617A publication Critical patent/GB280617A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J27/00—Ion beam tubes
    • H01J27/02—Ion sources; Ion guns
    • H01J27/26—Ion sources; Ion guns using surface ionisation, e.g. field effect ion sources, thermionic ion sources

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Combustion & Propulsion (AREA)
  • Solid Thermionic Cathode (AREA)

Abstract

280,617. Davies, L. J., and British Thomson-Houston Co., Ltd. July 19, 1926. Drawings to Specification. Vacuum tubes. - In order to eliminate space charge an electrode is provided which consists wholly or partly of a material possessing, when heated, the property of emitting positive ions which are solely those of a substance or substances non-gaseous at ordinary temperature; preferably a fused mixture of iron oxide with a small proportion of alkali or alkaline earth metal is used. The electrode may consist of a filament of platinum or tungsten coated with the material and mounted between the limbs of a V-shaped cathode. It is connected with terminals on a cap, and may be maintained at a positive potential. In a modification a part of the cathode, for instance a part near the positive leading-in wire, is coated with the ion-emitting material; the cathode thus emits electrons and positive ions. One or more grids may be provided. Specifications 208,728 and 232.978 are referred to.
GB1802026A 1926-07-19 1926-07-19 Improvements in electron-discharge-devices Expired GB280617A (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
BE343787D BE343787A (en) 1926-07-19
GB1802026A GB280617A (en) 1926-07-19 1926-07-19 Improvements in electron-discharge-devices

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB1802026A GB280617A (en) 1926-07-19 1926-07-19 Improvements in electron-discharge-devices

Publications (1)

Publication Number Publication Date
GB280617A true GB280617A (en) 1927-11-21

Family

ID=10105251

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1802026A Expired GB280617A (en) 1926-07-19 1926-07-19 Improvements in electron-discharge-devices

Country Status (2)

Country Link
BE (1) BE343787A (en)
GB (1) GB280617A (en)

Also Published As

Publication number Publication date
BE343787A (en)

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