GB1228809A - - Google Patents

Info

Publication number
GB1228809A
GB1228809A GB1228809DA GB1228809A GB 1228809 A GB1228809 A GB 1228809A GB 1228809D A GB1228809D A GB 1228809DA GB 1228809 A GB1228809 A GB 1228809A
Authority
GB
United Kingdom
Prior art keywords
grid
apertures
less
july
common
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
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 filed Critical
Publication of GB1228809A publication Critical patent/GB1228809A/en
Expired legal-status Critical Current

Links

Classifications

    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01JELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J29/00Details of cathode-ray tubes or of electron-beam tubes of the types covered by group H01J31/00
    • H01J29/02Electrodes; Screens; Mounting, supporting, spacing or insulating thereof
    • H01J29/06Screens for shielding; Masks interposed in the electron stream
    • H01J29/07Shadow masks for colour television tubes
    • H01J29/073Mounting arrangements associated with shadow masks
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B21MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21DWORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D22/00Shaping without cutting, by stamping, spinning, or deep-drawing
    • B21D22/02Stamping using rigid devices or tools
    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01JELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J29/00Details of cathode-ray tubes or of electron-beam tubes of the types covered by group H01J31/00
    • H01J29/46Arrangements of electrodes and associated parts for generating or controlling the ray or beam, e.g. electron-optical arrangement
    • H01J29/48Electron guns
    • H01J29/50Electron guns two or more guns in a single vacuum space, e.g. for plural-ray tube

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Electrodes For Cathode-Ray Tubes (AREA)
  • Vessels, Lead-In Wires, Accessory Apparatuses For Cathode-Ray Tubes (AREA)
  • Manufacture Of Electron Tubes, Discharge Lamp Vessels, Lead-In Wires, And The Like (AREA)

Abstract

1,228,809. Colour television tubes. PHILIPS ELECTRONIC & ASSOCIATED INDUSTRIES Ltd. 15 July, 1968 [18 July, 1967], No. 33648/68. Heading H1D. A triple electron gun for a colour television tube adapted to produce beams whose axes lie at the corners of an equilateral triangle, and comprising three cathodes 6 (only one of which is shown), three common grids 8, 10 and 12 each provided with an aperture for each of the three beams, and a common fourth grid 14 of circular cross-section, is characterized in that the centres of the apertures in the third grid are less than 4 mm. from the axis and the thickness of the third grid at these apertures is no greater than this distance and is preferably less than 1 mm. The third grid may be provided with an annular protuberance 12 surrounding the apertures and of a diameter less than or equal to that of the adjacent portion 16 of the fourth grid. The fourth grid may comprise two cylindrical portions, as shown, the length of the narrower portion 16 being preferably equal to its radius, which in one example is 7 mm.; alternatively the electrode may be conical at least in part. The construction shown includes a fifth grid 15 of the same diameter as the wider portion 17 of the fourth grid.
GB1228809D 1967-07-18 1968-07-15 Expired GB1228809A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
NL6709978A NL6709978A (en) 1967-07-18 1967-07-18
NL6809258A NL156857B (en) 1967-07-18 1968-06-29 ELECTRON BREAM TUBE WITH AN ELECTRON GUN FOR GENERATING THREE ELECTRON BUNDLES.

Publications (1)

Publication Number Publication Date
GB1228809A true GB1228809A (en) 1971-04-21

Family

ID=26644218

Family Applications (2)

Application Number Title Priority Date Filing Date
GB1228809D Expired GB1228809A (en) 1967-07-18 1968-07-15
GB1230109D Expired GB1230109A (en) 1967-07-18 1968-07-15

Family Applications After (1)

Application Number Title Priority Date Filing Date
GB1230109D Expired GB1230109A (en) 1967-07-18 1968-07-15

Country Status (7)

Country Link
JP (1) JPS521267B1 (en)
BE (2) BE718131A (en)
CH (2) CH483721A (en)
DE (2) DE1764596C3 (en)
FR (2) FR1572071A (en)
GB (2) GB1228809A (en)
NL (2) NL6709978A (en)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4520292A (en) * 1983-05-06 1985-05-28 Rca Corporation Cathode-ray tube having an asymmetric slot formed in a screen grid electrode of an inline electron gun
US4608515A (en) * 1985-04-30 1986-08-26 Rca Corporation Cathode-ray tube having a screen grid with asymmetric beam focusing means and refraction lens means formed therein
US4634924A (en) * 1985-08-06 1987-01-06 Rca Corporation Electron gun having cylindrical focus lens

Also Published As

Publication number Publication date
CH489899A (en) 1970-04-30
DE1764596C3 (en) 1978-11-09
JPS521267B1 (en) 1977-01-13
NL156857B (en) 1978-05-16
DE1764596B2 (en) 1978-03-16
FR1572071A (en) 1969-06-20
GB1230109A (en) 1971-04-28
DE1762578C3 (en) 1978-11-23
DE1764596A1 (en) 1971-09-09
NL6809258A (en) 1969-12-31
FR1572072A (en) 1969-06-20
NL6709978A (en) 1969-01-21
CH483721A (en) 1969-12-31
BE718131A (en) 1969-01-16
DE1762578B2 (en) 1978-03-23
DE1762578A1 (en) 1970-10-01
BE718132A (en) 1969-01-16

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Legal Events

Date Code Title Description
PS Patent sealed
PCNP Patent ceased through non-payment of renewal fee