GB295637A - Heated filament for thermionic valves - Google Patents

Heated filament for thermionic valves

Info

Publication number
GB295637A
GB295637A GB23286/28A GB2328628A GB295637A GB 295637 A GB295637 A GB 295637A GB 23286/28 A GB23286/28 A GB 23286/28A GB 2328628 A GB2328628 A GB 2328628A GB 295637 A GB295637 A GB 295637A
Authority
GB
United Kingdom
Prior art keywords
filament
heated filament
thermionic valves
resistance
cathode
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
GB23286/28A
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Publication of GB295637A publication Critical patent/GB295637A/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
    • H01J1/15—Cathodes heated directly by an electric current
    • H01J1/16—Cathodes heated directly by an electric current characterised by the shape

Landscapes

  • Solid Thermionic Cathode (AREA)

Abstract

295,637. Loewe, S. Aug. 15, 1927. [Convention date]. Vacuum tubes.-A filament cathode or a heater for a cathode is made of different resistance at different points, the resistance at the ends being greater than at the middle. This may be effected by varying the cross-section, as by attaching a second piece of filament 3 to a tungsten filament 2, or by using materials of different specific resistance, or emissivity. The filament may be used in multiple valves.
GB23286/28A 1927-08-15 1928-08-13 Heated filament for thermionic valves Expired GB295637A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE295637X 1927-08-15

Publications (1)

Publication Number Publication Date
GB295637A true GB295637A (en) 1929-12-13

Family

ID=6090105

Family Applications (1)

Application Number Title Priority Date Filing Date
GB23286/28A Expired GB295637A (en) 1927-08-15 1928-08-13 Heated filament for thermionic valves

Country Status (1)

Country Link
GB (1) GB295637A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE739644C (en) * 1939-04-02 1943-10-01 Sueddeutsche Telefon App Kabel Directly or indirectly heated glow cathode for electron tubes
DE907807C (en) * 1938-06-01 1954-03-29 Blaupunkt Elektronik G M B H Cathode for magnetic field tubes
EP0130395A1 (en) * 1983-06-29 1985-01-09 Siemens Aktiengesellschaft Fast warm-up cathode

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE907807C (en) * 1938-06-01 1954-03-29 Blaupunkt Elektronik G M B H Cathode for magnetic field tubes
DE739644C (en) * 1939-04-02 1943-10-01 Sueddeutsche Telefon App Kabel Directly or indirectly heated glow cathode for electron tubes
EP0130395A1 (en) * 1983-06-29 1985-01-09 Siemens Aktiengesellschaft Fast warm-up cathode

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