GB1113748A - Improvements in or relating to electron sources for an electron gun - Google Patents

Improvements in or relating to electron sources for an electron gun

Info

Publication number
GB1113748A
GB1113748A GB46755/66A GB4675566A GB1113748A GB 1113748 A GB1113748 A GB 1113748A GB 46755/66 A GB46755/66 A GB 46755/66A GB 4675566 A GB4675566 A GB 4675566A GB 1113748 A GB1113748 A GB 1113748A
Authority
GB
United Kingdom
Prior art keywords
cylinder
cathode
electron
secured
control electrode
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
GB46755/66A
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.)
Philips Electronics UK Ltd
Original Assignee
Philips Electronic and Associated Industries 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 Philips Electronic and Associated Industries Ltd filed Critical Philips Electronic and Associated Industries Ltd
Publication of GB1113748A publication Critical patent/GB1113748A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J3/00—Details of electron-optical or ion-optical arrangements or of ion traps common to two or more basic types of discharge tubes or lamps
    • H01J3/02—Electron guns
    • H01J3/027—Construction of the gun or parts thereof
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J29/00—Details of cathode-ray tubes or of electron-beam tubes of the types covered by group H01J31/00
    • H01J29/46—Arrangements of electrodes and associated parts for generating or controlling the ray or beam, e.g. electron-optical arrangement
    • H01J29/48—Electron guns
    • H01J29/485—Construction of the gun or of parts thereof

Abstract

1,113,748. Electron guns. PHILIPS ELECTRONIC & ASSOCIATED INDUSTRIES Ltd. 19 Oct., 1966 [22 Oct., 1965], No. 46755/66. Heading H1D. An electron source for an electron gun as in a cathode-ray tube for example comprises a perforated, cup-shaped control electrode 2, a cylindrical cathode support 1 with emissive end surface secured to supporting cylinder 4 by a plurality of supporting members 3, annular insulating body 5 surrounding and fixed to the supporting cylinder and having its outer surface secured by fusion or pressure welding for instance, to annular metallic body 6, in turn secured to a plurality of tongues 7 formed in the wall of the control electrode. In this construction the cylindrical faces only of insulator 5 need be metallized for soldering, and also, by suitable choice of angle α, preferably 35 to 60 degrees, in connection with the thermal expansion coefficients of components 1, 2, 3 and 4, the cathode to control electrode distance is near constant over large temperature variations and also the influence of mechanical tolerances in manufacture is minimized; strips 3 may have impressed grooves between bending points, or may be thin wires with depressions at the bending points to reduce the rigidity thereat. Cylinder 8 which may have two, preferably three tongues secured at 20, may be less than 25 Á thick to yield a short heating-up period, its radiation losses preventing excessive heating of the cathode, further reduction being obtained by reducing the cylinder length and blackening the outer surface of cylinder 8, support 1 and inner face of cylinder 4; cylinder 8 also serves as a metal vapour shield. Strips 3 may be of nickel-iron or nickel-iron-molybdenum, cylinder 4 of fernico, insulator 5 of pre-pressed glass, crystallized glass, or fusible ceramic material of 50% by weight of Al 2 O 3 and 50% by weight of an equal parts mixture of CaO and B 2 O 3 .
GB46755/66A 1965-10-22 1966-10-19 Improvements in or relating to electron sources for an electron gun Expired GB1113748A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
NL6513665A NL6513665A (en) 1965-10-22 1965-10-22

Publications (1)

Publication Number Publication Date
GB1113748A true GB1113748A (en) 1968-05-15

Family

ID=19794427

Family Applications (1)

Application Number Title Priority Date Filing Date
GB46755/66A Expired GB1113748A (en) 1965-10-22 1966-10-19 Improvements in or relating to electron sources for an electron gun

Country Status (9)

Country Link
US (1) US3354340A (en)
AT (1) AT261691B (en)
BE (1) BE688801A (en)
CH (1) CH458549A (en)
DE (1) DE1564462C3 (en)
ES (1) ES332473A1 (en)
FR (1) FR1504694A (en)
GB (1) GB1113748A (en)
NL (1) NL6513665A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0022201A1 (en) * 1979-06-21 1981-01-14 Kabushiki Kaisha Toshiba Cathode assembly
EP0025946A1 (en) * 1979-09-21 1981-04-01 International Standard Electric Corporation Heating element for indirectly heated cathode

Families Citing this family (18)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3569768A (en) * 1968-11-21 1971-03-09 Sylvania Electric Prod Cathode sleeve effecting maximum heat transfer to top of cathode cap and minimum to cap wall
DE2313911B2 (en) * 1973-03-20 1975-09-25 Standard Elektrik Lorenz Ag, 7000 Stuttgart Fast heating cathode for cathode ray tubes
GB1434984A (en) * 1973-07-10 1976-05-12 Standard Telephones Cables Ltd Magnetically beamed valves
NL7402421A (en) * 1974-02-22 1975-08-26 Philips Nv CATHOD BEAM TUBE FOR DISPLAYING COLORED IMAGES.
NL7405552A (en) * 1974-04-25 1975-10-28 Philips Nv CATHOD BEAM TUBE.
DE2541886C2 (en) * 1974-09-19 1983-01-13 Tokyo Shibaura Electric Co., Ltd., Kawasaki, Kanagawa Electron gun assembly with at least one electron gun unit
FR2315766A1 (en) * 1975-06-23 1977-01-21 Sciaky Sa ELECTRON CANNON
DE2642582A1 (en) * 1976-09-22 1978-03-23 Licentia Gmbh Cup-shaped control electrode in CRT - has cathode mounted in insulating ring held by metal sleeve in control electrode cavity
DE2642560C2 (en) * 1976-09-22 1983-08-04 Licentia Patent-Verwaltungs-Gmbh, 6000 Frankfurt Color cathode ray tube
DE2734869C2 (en) * 1977-08-03 1982-09-02 Standard Elektrik Lorenz Ag, 7000 Stuttgart Heater connection bracket for cathode ray tubes
NL8002343A (en) * 1980-04-23 1981-11-16 Philips Nv ELECTRON GUN AND CATHODE JET CONTAINING SUCH ELECTRON GUN.
NL8103814A (en) * 1981-08-14 1983-03-01 Philips Nv CATHED BEAM TUBE.
NL8105222A (en) * 1981-11-18 1983-06-16 Philips Nv CATHODE JET TUBE AND CATHODE UNIT FOR SUCH A CATHODE JET TUBE.
US4554480A (en) * 1983-11-29 1985-11-19 Rca Corporation Cathode-ray tube having an electron gun assembly with emissivity modifying means
KR0117988Y1 (en) * 1990-12-24 1998-04-24 Lg Electronics Inc Cathode of structure for cathode ray tube
JPH0737519A (en) * 1993-07-19 1995-02-07 Sony Corp Electron gun
NL2015039B1 (en) * 2013-12-30 2016-07-08 Mapper Lithography Ip Bv Focusing electrode for cathode arrangement, electron gun, and lithography system comprising such electron gun.
WO2015101537A1 (en) 2013-12-30 2015-07-09 Mapper Lithography Ip B.V. Cathode arrangement, electron gun, and lithography system comprising such electron gun

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2833952A (en) * 1955-10-14 1958-05-06 Sylvania Electric Prod Cathode ray tube electrode assembly
US3155865A (en) * 1961-12-15 1964-11-03 Gen Electric Low power heater

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0022201A1 (en) * 1979-06-21 1981-01-14 Kabushiki Kaisha Toshiba Cathode assembly
US4370588A (en) * 1979-06-21 1983-01-25 Tokyo Shibaura Denki Kabushiki Kaisha Cathode assembly
EP0025946A1 (en) * 1979-09-21 1981-04-01 International Standard Electric Corporation Heating element for indirectly heated cathode

Also Published As

Publication number Publication date
FR1504694A (en) 1967-12-08
DE1564462B2 (en) 1978-02-02
US3354340A (en) 1967-11-21
DE1564462A1 (en) 1970-01-22
ES332473A1 (en) 1967-10-16
DE1564462C3 (en) 1978-10-05
BE688801A (en) 1967-04-24
AT261691B (en) 1968-05-10
NL6513665A (en) 1967-04-24
CH458549A (en) 1968-06-30

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