GB601948A - Improvements in or relating to cathode-ray tubes - Google Patents

Improvements in or relating to cathode-ray tubes

Info

Publication number
GB601948A
GB601948A GB22919/46A GB2291946A GB601948A GB 601948 A GB601948 A GB 601948A GB 22919/46 A GB22919/46 A GB 22919/46A GB 2291946 A GB2291946 A GB 2291946A GB 601948 A GB601948 A GB 601948A
Authority
GB
United Kingdom
Prior art keywords
cathode
deflection
plates
ray tubes
symmetrical
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
GB22919/46A
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 Lamps Ltd
Koninklijke Philips NV
Original Assignee
Philips Lamps Ltd
Philips Gloeilampenfabrieken NV
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 Lamps Ltd, Philips Gloeilampenfabrieken NV filed Critical Philips Lamps Ltd
Publication of GB601948A publication Critical patent/GB601948A/en
Expired legal-status Critical Current

Links

Classifications

    • 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
    • H01J29/80—Arrangements for controlling the ray or beam after passing the main deflection system, e.g. for post-acceleration or post-concentration, for colour switching
    • 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
    • H01J29/70—Arrangements for deflecting ray or beam
    • H01J29/72—Arrangements for deflecting ray or beam along one straight line or along two perpendicular straight lines
    • H01J29/74—Deflecting by electric fields only

Landscapes

  • Image-Pickup Tubes, Image-Amplification Tubes, And Storage Tubes (AREA)
  • Earth Drilling (AREA)
  • Discharge Lamp (AREA)

Abstract

601,948. Cathode-ray tubes. PHILIPS LAMPS, Ltd. Aug. 1, 1946, No. 22919. Convention date, March 13, 1940. [Class 39 (i)] In a cathode-ray tube in which the beam is accelerated after deflection, astigmation introduced by the cylindrical lens formed between the last deflecting plates and the accelerating electrode is compensated by a further cylindrical lens crossed with reference to the first lens and arranged between these plates and the screen. In one form, extensions 15, 16, Fig. 4, are secured to the constant potential plate 2 and are symmetrical about the plane of deflection. If the deflection is symmetrical, each extension is made in two parts which are cross-connected to opposite plates. Alternatively the accelerating electrodes 12, 13, Fig. 6, may be distorted as at 20 to introduce the desired cylindrical component. The subject-matter is identical with that of Specification 553,466. Specifications 451,574, 473,675 and 479,064 are referred to.
GB22919/46A 1940-03-13 1946-08-01 Improvements in or relating to cathode-ray tubes Expired GB601948A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
NL601948X 1940-03-13

Publications (1)

Publication Number Publication Date
GB601948A true GB601948A (en) 1948-05-14

Family

ID=19787816

Family Applications (2)

Application Number Title Priority Date Filing Date
GB6304/41A Expired GB553466A (en) 1940-03-13 1941-05-15 Improvements in or relating to cathode-ray tubes
GB22919/46A Expired GB601948A (en) 1940-03-13 1946-08-01 Improvements in or relating to cathode-ray tubes

Family Applications Before (1)

Application Number Title Priority Date Filing Date
GB6304/41A Expired GB553466A (en) 1940-03-13 1941-05-15 Improvements in or relating to cathode-ray tubes

Country Status (3)

Country Link
FR (1) FR870787A (en)
GB (2) GB553466A (en)
NL (1) NL97277C (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2135503A (en) * 1982-12-27 1984-08-30 Tektronix Inc Accelerating and scan expansion electron lens system

Families Citing this family (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2734147A (en) * 1956-02-07 beckers
DE942518C (en) * 1948-10-02 1956-05-03 Zeiss Carl Fa Device for compensating the symmetry errors of electron lenses
NL225735A (en) * 1957-03-13
NL226053A (en) * 1957-03-27
US3205391A (en) * 1957-11-18 1965-09-07 Multi Tron Lab Inc Negative-lens type deflection magnifying means for electron beam in cathode ray tubes
US3005927A (en) * 1958-01-27 1961-10-24 Rca Corp Cathode-ray tubes of the focus-mask variety
US2981864A (en) * 1958-06-26 1961-04-25 Sylvania Electric Prod Image display device
US3154710A (en) * 1958-11-13 1964-10-27 Motorola Inc Cathode-ray display system having electrostatic magnifying lens
NL250540A (en) * 1959-04-16

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2135503A (en) * 1982-12-27 1984-08-30 Tektronix Inc Accelerating and scan expansion electron lens system

Also Published As

Publication number Publication date
GB553466A (en) 1943-05-24
NL97277C (en)
FR870787A (en) 1942-03-24

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