GB820065A - Improvements relating to cathode structures for electric discharge devices - Google Patents

Improvements relating to cathode structures for electric discharge devices

Info

Publication number
GB820065A
GB820065A GB30118/55A GB3011855A GB820065A GB 820065 A GB820065 A GB 820065A GB 30118/55 A GB30118/55 A GB 30118/55A GB 3011855 A GB3011855 A GB 3011855A GB 820065 A GB820065 A GB 820065A
Authority
GB
United Kingdom
Prior art keywords
cup
foil
cathode
heater
oct
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
GB30118/55A
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.)
General Electric Co
Original Assignee
General Electric Co
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 General Electric Co filed Critical General Electric Co
Publication of GB820065A publication Critical patent/GB820065A/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
    • 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

Abstract

820,065. Thermionic cathode constructions. GENERAL ELECTRIC CO. Oct. 21, 1955 [Oct. 22, 1954], No. 30118/55. Class 39(1). A thermionic cathode structure includes a cup-shaped member of thin metal foil with one or more side pieces extending along its length and the layer of emissive material located adjacent the end face. The cathode may be directly or indirectly heated. In the directly-heated case the foil member has two or more side arms 15, 16, Fig. 3, forming the heater leads ; or a central lead 29, Fig. 6, may be positioned within a foil cup 28. In the indirectly-heated case a similar member 18, Fig. 4, may be used to heat a cup cathode 19 ; or a foil cup 32, Fig. 7, may be backed by an insulating disc 35 on which is deposited (a) a heater film 36 with a central lead 37 or (b) a filamentary heater with one or two leads and of various zig-zag, spiral or cross shapes, Figs. 8, 9 (not shown). Specifications 755,985, 813,829 [Group XXXVI], 820,067 and 820,068 [Group XXXVI] are referred to.
GB30118/55A 1954-10-22 1955-10-21 Improvements relating to cathode structures for electric discharge devices Expired GB820065A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US820065XA 1954-10-22 1954-10-22

Publications (1)

Publication Number Publication Date
GB820065A true GB820065A (en) 1959-09-16

Family

ID=22167990

Family Applications (1)

Application Number Title Priority Date Filing Date
GB30118/55A Expired GB820065A (en) 1954-10-22 1955-10-21 Improvements relating to cathode structures for electric discharge devices

Country Status (3)

Country Link
DE (1) DE1133041B (en)
FR (1) FR1137688A (en)
GB (1) GB820065A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2144261A (en) * 1983-07-29 1985-02-27 Sundstrand Optical Tech Ring laser gyro cathode arrangement
GB2268325A (en) * 1992-07-01 1994-01-05 Thorn Emi Electronics Ltd Thermionic cathode structure.

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1146985B (en) * 1960-11-04 1963-04-11 Siemens Ag Semi-indirectly heated cathode for electron tubes
DE1208830B (en) * 1963-06-12 1966-01-13 Dr Jakob Bingel Device for generating a high-power electron beam for heating purposes

Family Cites Families (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE645937C (en) * 1934-07-04 1937-06-07 Aeg Electrical discharge vessel with indirectly heated cathode
DE693697C (en) * 1934-08-13 1940-07-17 Philips Patentverwaltung Indirectly heated cathode for electrical discharge tubes
US2256297A (en) * 1939-08-31 1941-09-16 Rca Corp Electron discharge device
BE473991A (en) * 1941-06-24
BE478852A (en) * 1942-06-26
FR978463A (en) * 1942-09-14 1951-04-13 Csf Direct heated cathode for velocity modulated tube
DE896394C (en) * 1942-12-25 1953-11-12 Telefunken Gmbh Decimeter wave tube with indirectly heated cathode, which is carried by a tube serving with its outside as part of an oscillating circuit and containing the heating line inside
US2454298A (en) * 1943-07-29 1948-11-23 Harold A Zahl Electronic tube
BE470922A (en) * 1944-01-31
FR959951A (en) * 1944-02-12 1950-04-07
GB587014A (en) * 1944-09-15 1947-04-10 Jack Reed Improvements in or relating to cathodes for electron discharge devices
NL69250C (en) * 1946-03-05
FR1032465A (en) * 1951-02-14 1953-07-02 Radiotechnique Process for manufacturing grid-shaped structures, intended in particular for electrical appliances

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2144261A (en) * 1983-07-29 1985-02-27 Sundstrand Optical Tech Ring laser gyro cathode arrangement
GB2268325A (en) * 1992-07-01 1994-01-05 Thorn Emi Electronics Ltd Thermionic cathode structure.
GB2268325B (en) * 1992-07-01 1996-01-03 Thorn Emi Electronics Ltd Thermionic cathode structure

Also Published As

Publication number Publication date
FR1137688A (en) 1957-06-03
DE1133041B (en) 1962-07-12

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