GB645756A - Improvements relating to electron discharge devices such as television transmission tubes - Google Patents

Improvements relating to electron discharge devices such as television transmission tubes

Info

Publication number
GB645756A
GB645756A GB27466/47A GB2746647A GB645756A GB 645756 A GB645756 A GB 645756A GB 27466/47 A GB27466/47 A GB 27466/47A GB 2746647 A GB2746647 A GB 2746647A GB 645756 A GB645756 A GB 645756A
Authority
GB
United Kingdom
Prior art keywords
electrode
coils
coating
improvements relating
discharge devices
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
GB27466/47A
Inventor
James Dwyer Mcgee
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.)
EMI Ltd
Electrical and Musical Industries Ltd
Original Assignee
EMI Ltd
Electrical and Musical 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 EMI Ltd, Electrical and Musical Industries Ltd filed Critical EMI Ltd
Publication of GB645756A publication Critical patent/GB645756A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J31/00—Cathode ray tubes; Electron beam tubes
    • H01J31/08—Cathode ray tubes; Electron beam tubes having a screen on or from which an image or pattern is formed, picked up, converted, or stored
    • H01J31/26—Image pick-up tubes having an input of visible light and electric output
    • H01J31/28—Image pick-up tubes having an input of visible light and electric output with electron ray scanning the image screen
    • H01J31/34—Image pick-up tubes having an input of visible light and electric output with electron ray scanning the image screen having regulation of screen potential at cathode potential, e.g. orthicon

Landscapes

  • Analysing Materials By The Use Of Radiation (AREA)
  • Particle Accelerators (AREA)

Abstract

645,756. Cathode-ray tubes. ELECTRIC & MUSICAL INDUSTRIES, Ltd. Oct. 14, 1947, No. 27466. [Class 39 (i)] In a cathode tube of the kind in which a mosaic electrode is scanned by a beam which is deflected by coils 15, Fig. 1, to produce output signals, spurious signals caused by eddy currents induced by the coils in an electrode 8, providing a uniform field in the path of the beam, are reduced by the provision of gaps 11 in the electrode. In the form shown, the electrode 8 consists of an internal coating subdivided, for at least part of its length, into strips. In another form, the coating comprises axially spaced rings 19, Fig. 2, joined at one end to a strip 22, formed by an extension of the continuous part 9. The tube may comprise a focusing coil 13, alignment coils 14 and a retarding electrode coating 12.
GB27466/47A 1947-10-14 1947-10-14 Improvements relating to electron discharge devices such as television transmission tubes Expired GB645756A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB268711X 1947-10-14
GB220948X 1948-09-22

Publications (1)

Publication Number Publication Date
GB645756A true GB645756A (en) 1950-11-08

Family

ID=26255721

Family Applications (1)

Application Number Title Priority Date Filing Date
GB27466/47A Expired GB645756A (en) 1947-10-14 1947-10-14 Improvements relating to electron discharge devices such as television transmission tubes

Country Status (2)

Country Link
CH (1) CH268711A (en)
GB (1) GB645756A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2916659A (en) * 1956-02-24 1959-12-08 Sperry Rand Corp Electron beam forming apparatus
GB2164202A (en) * 1984-09-05 1986-03-12 Philips Electronic Associated Charged particle beam apparatus

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2916659A (en) * 1956-02-24 1959-12-08 Sperry Rand Corp Electron beam forming apparatus
GB2164202A (en) * 1984-09-05 1986-03-12 Philips Electronic Associated Charged particle beam apparatus

Also Published As

Publication number Publication date
CH268711A (en) 1950-05-31

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