GB787458A - Improvements relating to indirectly heated cathodes for thermionic valves - Google Patents

Improvements relating to indirectly heated cathodes for thermionic valves

Info

Publication number
GB787458A
GB787458A GB3446853A GB3446853A GB787458A GB 787458 A GB787458 A GB 787458A GB 3446853 A GB3446853 A GB 3446853A GB 3446853 A GB3446853 A GB 3446853A GB 787458 A GB787458 A GB 787458A
Authority
GB
United Kingdom
Prior art keywords
improvements relating
indirectly heated
thermionic valves
heated cathodes
dec
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
GB3446853A
Inventor
Ernest Yeoman Robinson
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.)
Edison Swan Electric Co Ltd
Original Assignee
Edison Swan Electric 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 Edison Swan Electric Co Ltd filed Critical Edison Swan Electric Co Ltd
Priority to GB3446853A priority Critical patent/GB787458A/en
Priority to FR1118456D priority patent/FR1118456A/en
Publication of GB787458A publication Critical patent/GB787458A/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
    • H01J1/24—Insulating layer or body located between heater and emissive material

Landscapes

  • Electron Sources, Ion Sources (AREA)

Abstract

787,458. Electrophonetic deposition. EDISON SWAN ELECTRIC CO., Ltd. Dec. 1, 1954 [Dec. 10, 1953], No. 34468/53. Drawings to Specification. Class 41. [Also in Group XL (a)] A wire is coated with aluminium oxide by immersing it in a suspension of the oxide in a water alcohol mixture, to which has been added a small amount of aluminium nitrate and magnesium nitrate, and applying a negative potential thereto. After coating to the required thickness, the wire is fired in hydrogen at 1600-1700 C. Reference has been directed by the Comptroller to Specification 725,111 [Group XL (a)].
GB3446853A 1953-12-10 1953-12-10 Improvements relating to indirectly heated cathodes for thermionic valves Expired GB787458A (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
GB3446853A GB787458A (en) 1953-12-10 1953-12-10 Improvements relating to indirectly heated cathodes for thermionic valves
FR1118456D FR1118456A (en) 1953-12-10 1954-12-08 Improvements to indirectly heated cathodes for thermionic tubes

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB3446853A GB787458A (en) 1953-12-10 1953-12-10 Improvements relating to indirectly heated cathodes for thermionic valves

Publications (1)

Publication Number Publication Date
GB787458A true GB787458A (en) 1957-12-11

Family

ID=10366014

Family Applications (1)

Application Number Title Priority Date Filing Date
GB3446853A Expired GB787458A (en) 1953-12-10 1953-12-10 Improvements relating to indirectly heated cathodes for thermionic valves

Country Status (2)

Country Link
FR (1) FR1118456A (en)
GB (1) GB787458A (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1093486B (en) * 1957-10-23 1960-11-24 Philips Nv Indirectly heated cathode for electrical discharge tubes, where the heating element is surrounded and centered by a wire-shaped support element
US3214627A (en) * 1961-02-24 1965-10-26 Tokyo Shibaura Electric Co Rapid-start cathode-ray tubes
US3223876A (en) * 1962-09-06 1965-12-14 Sfd Lab Inc Cathode heater assembly for use in strong d.c. magnetic fields
US3740606A (en) * 1971-09-01 1973-06-19 Gte Sylvania Inc Vibration suppressor in cathode assembly for electron discharge device

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3928785A (en) * 1971-11-23 1975-12-23 Adrian W Standaart Single gun, multi-screen, multi-beam, multi-color cathode ray tube
DE2404362B1 (en) * 1974-01-30 1975-07-31 Standard Elektrik Lorenz Ag, 7000 Stuttgart Radiator for an indirectly heated cathode

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1093486B (en) * 1957-10-23 1960-11-24 Philips Nv Indirectly heated cathode for electrical discharge tubes, where the heating element is surrounded and centered by a wire-shaped support element
US3214627A (en) * 1961-02-24 1965-10-26 Tokyo Shibaura Electric Co Rapid-start cathode-ray tubes
US3223876A (en) * 1962-09-06 1965-12-14 Sfd Lab Inc Cathode heater assembly for use in strong d.c. magnetic fields
US3740606A (en) * 1971-09-01 1973-06-19 Gte Sylvania Inc Vibration suppressor in cathode assembly for electron discharge device

Also Published As

Publication number Publication date
FR1118456A (en) 1956-06-06

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