GB1404898A - Shadow mask for colour picture tubes - Google Patents

Shadow mask for colour picture tubes

Info

Publication number
GB1404898A
GB1404898A GB1752173A GB1752173A GB1404898A GB 1404898 A GB1404898 A GB 1404898A GB 1752173 A GB1752173 A GB 1752173A GB 1752173 A GB1752173 A GB 1752173A GB 1404898 A GB1404898 A GB 1404898A
Authority
GB
United Kingdom
Prior art keywords
remainder
alloys
shadow mask
mask
picture tubes
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
GB1752173A
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.)
GEA Group AG
Original Assignee
Metallgesellschaft AG
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 Metallgesellschaft AG filed Critical Metallgesellschaft AG
Publication of GB1404898A publication Critical patent/GB1404898A/en
Expired legal-status Critical Current

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C38/00—Ferrous alloys, e.g. steel alloys
    • C22C38/08—Ferrous alloys, e.g. steel alloys containing nickel
    • 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
    • H01J29/02—Electrodes; Screens; Mounting, supporting, spacing or insulating thereof
    • H01J29/06—Screens for shielding; Masks interposed in the electron stream
    • H01J29/07—Shadow masks for colour television tubes
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J2229/00—Details of cathode ray tubes or electron beam tubes
    • H01J2229/07—Shadow masks
    • H01J2229/0727—Aperture plate
    • H01J2229/0733—Aperture plate characterised by the material

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Electrodes For Cathode-Ray Tubes (AREA)

Abstract

1404898 Alloys METALLGESELLSCHAFT AG 11 April 1973 [11 April 1972] 17521/73 Heading C7A [ Also in Division H1] Iron alloys suitable for the shadow mask of a colour television tube include compositions falling within 30 to 45% Ni, 0 to 2.5% Mn, 0 to 2% Si, 0 to 2% C, 0 to 8% Co, 0 to 11% Cr, 0 to 3% W, and the remainder Fe; a similar composition with zero Co, Cr, and W content but with up to 0.04% Pb and up to 0.05% S; and compositions falling within 33 to 36% Ni, 4 to 12% Cr, 0.5 to 2% C, 0.5 to 2.5 Mn, 0.5 to 2% Si, 1 to 3% W, and the remainder Fe. Alloys suitable for support springs for the mask include 18% Cr, 8% Ni, up to 0.12% C, up to 2% Mn, up to 1% Si, and the remainder Fe; 22% Ni, 3% Cr, up to 0.12% C, up to 2% Mn, up to 1% Si, and the remainder Fe; and 20% Ni, 6% Mn, up to 0.12% C, up to 1% Si, and the remainder iron. The mask alloys have coefficient of thermal expansion not greater than 2 x 10<SP>-6</SP>0C<SP>-1</SP> in the range 20 to 80‹C, while the spring alloys have coefficients in the range 10 to 28 x 10<SP>-6</SP>0C<SP>-1</SP>
GB1752173A 1972-04-11 1973-04-11 Shadow mask for colour picture tubes Expired GB1404898A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19722217280 DE2217280A1 (en) 1972-04-11 1972-04-11 PERFORATED SCREEN IN COLOR TUBES

Publications (1)

Publication Number Publication Date
GB1404898A true GB1404898A (en) 1975-09-03

Family

ID=5841547

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1752173A Expired GB1404898A (en) 1972-04-11 1973-04-11 Shadow mask for colour picture tubes

Country Status (4)

Country Link
DE (1) DE2217280A1 (en)
GB (1) GB1404898A (en)
IT (1) IT983742B (en)
NL (1) NL7304809A (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2041405A (en) * 1979-01-26 1980-09-10 Nisshin Steel Co Ltd Improved invar alloy
GB2176050A (en) * 1985-05-29 1986-12-10 Mitsubishi Electric Corp Crt shadow mask
EP1065291A1 (en) * 1998-03-19 2001-01-03 Toyo Kohan Co., Ltd Material for aperture grill for color picture tube, process for making the same, aperture grill, and picture tube
WO2003046241A1 (en) * 2001-11-30 2003-06-05 Tors Ferromagnetic alloy for induction heated cooking

Families Citing this family (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS59149635A (en) * 1983-01-31 1984-08-27 Toshiba Corp Manufacture of shadowmask
JPS61118939A (en) * 1984-11-14 1986-06-06 Nippon Gakki Seizo Kk Shadow mask for color picture tube
JPH068458B2 (en) * 1984-11-24 1994-02-02 ヤマハ株式会社 Method of manufacturing sheer mask for color picture tube
US4900976A (en) * 1987-12-02 1990-02-13 Zenith Electronics Corporation Material and assemblies for tensioned foil shadow masks
EP0410965B1 (en) * 1987-12-02 2002-07-10 Lg Electronics Inc. Material and process for the manufacture of tension masks for cathode ray tubes
US4885501A (en) * 1987-12-02 1989-12-05 Zenith Electronics Corporation Blackening of non iron-based flat tensioned foil shadow masks
US4929864A (en) * 1987-12-02 1990-05-29 Zenith Electronics Corporation NI-based FTM shadow masks having a nickel phosphide black layer
US4904218A (en) * 1987-12-02 1990-02-27 Zenith Electronics Corporation Blackening of non-iron-based flat tensioned foil shadow masks
US5127965A (en) * 1990-07-17 1992-07-07 Nkk Corporation Fe-ni alloy sheet for shadow mask and method for manufacturing same
JP2596210B2 (en) * 1990-10-31 1997-04-02 日本鋼管株式会社 Method of preventing adhesion seizure during annealing, Fe-Ni alloy for shadow mask excellent in gas emission, and method for producing the same
BE1008028A4 (en) * 1994-01-17 1995-12-12 Philips Electronics Nv Method for manufacturing of a shadow mask nickel iron type.
DE19920144C1 (en) * 1999-05-03 2000-08-03 Krupp Vdm Gmbh Iron-nickel alloy is used for shadow masks and frame parts of screens, passive components of thermo-bimetals, in the production, storage and transport of liquefied gases or for components of laser technology

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2041405A (en) * 1979-01-26 1980-09-10 Nisshin Steel Co Ltd Improved invar alloy
GB2176050A (en) * 1985-05-29 1986-12-10 Mitsubishi Electric Corp Crt shadow mask
GB2176050B (en) * 1985-05-29 1989-09-06 Mitsubishi Electric Corp Shadow mask and fabricating method therefor
EP1065291A1 (en) * 1998-03-19 2001-01-03 Toyo Kohan Co., Ltd Material for aperture grill for color picture tube, process for making the same, aperture grill, and picture tube
EP1065291A4 (en) * 1998-03-19 2004-05-12 Toyo Kohan Co Ltd Material for aperture grill for color picture tube, process for making the same, aperture grill, and picture tube
WO2003046241A1 (en) * 2001-11-30 2003-06-05 Tors Ferromagnetic alloy for induction heated cooking
FR2833019A1 (en) * 2001-11-30 2003-06-06 Imphy Ugine Precision FERROMAGNETIC ALLOY FOR INDUCTION COOKING

Also Published As

Publication number Publication date
IT983742B (en) 1974-11-11
NL7304809A (en) 1973-10-15
DE2217280A1 (en) 1973-10-31

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Legal Events

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