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GB562398A - Improvements in cathodes for electron discharge tubes - Google Patents

Improvements in cathodes for electron discharge tubes

Info

Publication number
GB562398A
GB562398A GB772/43A GB77243A GB562398A GB 562398 A GB562398 A GB 562398A GB 772/43 A GB772/43 A GB 772/43A GB 77243 A GB77243 A GB 77243A GB 562398 A GB562398 A GB 562398A
Authority
GB
United Kingdom
Prior art keywords
cathode
electron discharge
cathodes
heating element
discharge tubes
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
GB772/43A
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.)
STC PLC
Original Assignee
Standard Telephone and Cables PLC
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 Standard Telephone and Cables PLC filed Critical Standard Telephone and Cables PLC
Publication of GB562398A publication Critical patent/GB562398A/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
    • H01J1/20—Cathodes heated indirectly by an electric current; Cathodes heated by electron or ion bombardment

Landscapes

  • Solid Thermionic Cathode (AREA)
  • Microwave Tubes (AREA)
  • Electron Sources, Ion Sources (AREA)
  • Electrodes For Cathode-Ray Tubes (AREA)

Abstract

562,398. Electron discharge apparatus. STANDARD TELEPHONES & CABLES, Ltd. Jan. 15, 1943, No. 772. Convention date, Feb. 6, 1942. [Class 39 (i)] A supporting arrangement for a cathode 16 having an internal heating element 12 comprises a member 18 attached to the cathode around an edge thereof and shaped so that a portion of its surface approaches close to the heating element for the purpose of conducting heat to the cathode. Disc-like shields 24 and 25 are placed at the top of the cathode to divert the flow of heat to the top edge of the cathode also. The supporting member is secured to a metal section 19 of the tube which may serve as a terminal. The cathode may be provided on its outside with an electron emitting thorium layer.
GB772/43A 1942-02-06 1943-01-15 Improvements in cathodes for electron discharge tubes Expired GB562398A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US429747A US2314097A (en) 1942-02-06 1942-02-06 Equipotential cathode

Publications (1)

Publication Number Publication Date
GB562398A true GB562398A (en) 1944-06-29

Family

ID=23704567

Family Applications (1)

Application Number Title Priority Date Filing Date
GB772/43A Expired GB562398A (en) 1942-02-06 1943-01-15 Improvements in cathodes for electron discharge tubes

Country Status (4)

Country Link
US (1) US2314097A (en)
FR (1) FR928315A (en)
GB (1) GB562398A (en)
NL (1) NL65083C (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
BE518861A (en) * 1952-04-01
US2768321A (en) * 1955-05-02 1956-10-23 Rca Corp Indirectly heated electron emitter for power tubes and the like

Also Published As

Publication number Publication date
FR928315A (en) 1947-11-25
NL65083C (en)
US2314097A (en) 1943-03-16

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