GB1401338A - Cathode-ray tube having conductive internal coating of iron oxide and graphite - Google Patents

Cathode-ray tube having conductive internal coating of iron oxide and graphite

Info

Publication number
GB1401338A
GB1401338A GB5444772A GB5444772A GB1401338A GB 1401338 A GB1401338 A GB 1401338A GB 5444772 A GB5444772 A GB 5444772A GB 5444772 A GB5444772 A GB 5444772A GB 1401338 A GB1401338 A GB 1401338A
Authority
GB
United Kingdom
Prior art keywords
iron oxide
ray tube
graphite
cathode
coating
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
GB5444772A
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.)
RCA Corp
Original Assignee
RCA Corp
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 RCA Corp filed Critical RCA Corp
Publication of GB1401338A publication Critical patent/GB1401338A/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
    • H01J29/86—Vessels; Containers; Vacuum locks
    • H01J29/88—Vessels; Containers; Vacuum locks provided with coatings on the walls thereof; Selection of materials for the coatings
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J2229/00—Details of cathode ray tubes or electron beam tubes
    • H01J2229/88—Coatings
    • H01J2229/882—Coatings having particular electrical resistive or conductive properties

Landscapes

  • Vessels, Lead-In Wires, Accessory Apparatuses For Cathode-Ray Tubes (AREA)
  • Formation Of Various Coating Films On Cathode Ray Tubes And Lamps (AREA)

Abstract

1401338 Cathode ray tubes RCA CORPORATION 24 Nov 1972 [26 Nov 1971] 54447/72 Heading H1D A conductive coating for the interior of the envelope of a cathode ray tube consists essentially of graphite particles, iron oxide particles and an alkali silicate binder. Such a coating has a point to point resistance of between 200 and 2000 ohms per inch. Preferably, the coating consists of 100 p.p.w. graphite particles (90% below 10Á diameter), 200 to 600 p.p.w. ironoxide, preferably Fe 2 O 3 (90% below 10Á diameter), and 50 to 150 p.p.w. sodium silicate. The latter is dissolved in 400 to 1500 p.p.w. water containing a dispersant. The aqueous suspension is brushed on to the internal wall of the neck of the tube and then sprayed on to the internal wall of the funnel. It is dried and baked at a temperature of between 200‹ and 450‹ C.
GB5444772A 1971-11-26 1972-11-24 Cathode-ray tube having conductive internal coating of iron oxide and graphite Expired GB1401338A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US20242871A 1971-11-26 1971-11-26

Publications (1)

Publication Number Publication Date
GB1401338A true GB1401338A (en) 1975-07-16

Family

ID=22749832

Family Applications (1)

Application Number Title Priority Date Filing Date
GB5444772A Expired GB1401338A (en) 1971-11-26 1972-11-24 Cathode-ray tube having conductive internal coating of iron oxide and graphite

Country Status (10)

Country Link
US (1) US3791546A (en)
JP (1) JPS5238713B2 (en)
AU (1) AU463352B2 (en)
BE (1) BE791817A (en)
CA (1) CA979477A (en)
DE (1) DE2257497C3 (en)
FR (1) FR2161000B1 (en)
GB (1) GB1401338A (en)
IT (1) IT969626B (en)
NL (1) NL175565C (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0844641A1 (en) * 1996-11-26 1998-05-27 Lg Electronics Inc. Interior coating for color CRT
NL1002804C2 (en) * 1995-04-04 1999-01-12 Hitachi Powdered Metals Coating material for an inner layer of a cathode ray tube.

Families Citing this family (21)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5167992A (en) * 1974-12-10 1976-06-12 Nippon Kokuen Kogyo Kk INKYOKUSEN KANDODENSEINAIMENHIMAKUKEISEIYOSOSEIBUTSU
US4018717A (en) * 1975-09-29 1977-04-19 Owens-Illinois, Inc. Arc suppression in a cathode ray tube
US4092444A (en) * 1975-11-24 1978-05-30 Gte Laboratories Incorporated Cathode ray tube having amorphous resistive film on internal surfaces and method of forming the film
DE2605526C2 (en) * 1976-02-12 1986-04-30 Licentia Patent-Verwaltungs-Gmbh, 6000 Frankfurt Electrically conductive inner lining for a cathode ray tube
NL7605988A (en) * 1976-06-03 1977-12-06 Philips Nv IMAGE DISPLAY TUBE WITH INTERNAL RESISTANCE LAYER.
US4188564A (en) * 1976-12-13 1980-02-12 U.S. Philips Corporation Cathode ray tube having low resistance contact area beneath high voltage contact spring
NL7613806A (en) * 1976-12-13 1978-06-15 Philips Nv COLOR TELEVISION PICTURE TUBE.
JPS5426657A (en) * 1977-07-30 1979-02-28 Sony Corp Cathode ray tube
DE2816490C2 (en) * 1978-04-15 1986-12-18 Licentia Patent-Verwaltungs-Gmbh, 6000 Frankfurt cathode ray tube
US4163919A (en) * 1978-05-08 1979-08-07 Gte Sylvania Incorporated Cathode ray tube internal resistive coating and method of manufacture
US4210844A (en) * 1978-11-20 1980-07-01 Gte Sylvania Incorporated Cathode ray tube arc suppressor coating
DE2903735A1 (en) * 1979-02-01 1980-08-07 Standard Elektrik Lorenz Ag Conductive cathode ray tube layer - applied after coating bare areas with lacquer film
US4425377A (en) 1981-07-22 1984-01-10 Rca Corporation Method of making a cathode-ray tube having a conductive internal coating exhibiting reduced arcing current
JPS6029989U (en) * 1983-08-06 1985-02-28 新興▲べん▼栓株式会社 pipe fittings
KR900006174B1 (en) * 1985-01-31 1990-08-24 히타찌 훈마쯔 야킨 가부시끼가이샤 Cathode ray tubes and coating materials therefor
DE3842837A1 (en) * 1988-12-20 1990-06-21 Nokia Unterhaltungselektronik GRAPHITE-BASED SUSPENSION
JPH02214784A (en) * 1989-02-15 1990-08-27 Nippon Achison Kk Interior finish coating material composition for cathode ray tube
JP3402743B2 (en) * 1994-04-06 2003-05-06 日立粉末冶金株式会社 Paint for CRT interior
TW328607B (en) * 1996-08-19 1998-03-21 Philips Eloctronics N V Method of manufacturing a device, a heater for carrying out the method and a display device treated in accordance with said method
JP3578971B2 (en) * 2000-05-17 2004-10-20 日立粉末冶金株式会社 Interior coatings for cathode ray tubes
US7847248B2 (en) 2007-12-28 2010-12-07 Mds Analytical Technologies, A Business Unit Of Mds Inc. Method and apparatus for reducing space charge in an ion trap

Family Cites Families (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2162391A (en) * 1935-04-18 1939-06-13 Firm Of Fernseh Ag Electron tube with high ohmic wall coatings
US2409514A (en) * 1945-01-30 1946-10-15 Rca Corp Cathode-ray tube
US2617741A (en) * 1951-12-19 1952-11-11 Pittsburgh Plate Glass Co Electroconductive article and production thereof
US2689804A (en) * 1952-02-07 1954-09-21 Philco Corp Process of producing a light diffusing film on a glass surface
DE927280C (en) * 1953-04-02 1955-05-05 Telefunken Gmbh Cathode ray tubes, especially picture tubes, for television reception
US2818355A (en) * 1955-11-21 1957-12-31 Philips Corp Method of producing a conductive layer of graphite on an insulating substratum
USRE25767E (en) * 1958-03-05 1965-04-27 Treating glass sheets
DE1163501B (en) * 1958-05-24 1964-02-20 Philips Patentverwaltung Graphite suspension for use as conductive inner coatings in electron beam tubes
US3076727A (en) * 1959-12-24 1963-02-05 Libbey Owens Ford Glass Co Article having electrically conductive coating and process of making
NL145095B (en) * 1965-06-15 1975-02-17 Acheson Ind Inc PROCESS FOR PREPARING A PREPARATION FOR FORMING AN ELECTRICAL CONDUCTIVE COATING LAYER, AND A PROCESS FOR FORMING THIS ELECTRICAL CONDUCTIVE COATING LAYER ON SUPPORT SURFACES AND SURFACE SURFACE WITH A SURFACE SURFACE.
DE1564508B1 (en) * 1966-09-29 1970-09-24 Philips Patentverwaltung Graphite suspension in water to form conductive inner coatings in electron beam tubes

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL1002804C2 (en) * 1995-04-04 1999-01-12 Hitachi Powdered Metals Coating material for an inner layer of a cathode ray tube.
EP0844641A1 (en) * 1996-11-26 1998-05-27 Lg Electronics Inc. Interior coating for color CRT
CN1121461C (en) * 1996-11-26 2003-09-17 Lg电子株式会社 Interior coating for color CRT

Also Published As

Publication number Publication date
NL7215969A (en) 1973-05-29
DE2257497C3 (en) 1981-10-01
NL175565C (en) 1984-11-16
JPS5238713B2 (en) 1977-09-30
FR2161000B1 (en) 1977-07-22
AU463352B2 (en) 1975-07-24
US3791546A (en) 1974-02-12
AU4868172A (en) 1974-05-09
CA979477A (en) 1975-12-09
DE2257497A1 (en) 1973-05-30
IT969626B (en) 1974-04-10
DE2257497B2 (en) 1975-03-20
BE791817A (en) 1973-03-16
FR2161000A1 (en) 1973-07-06
JPS4861070A (en) 1973-08-27
NL175565B (en) 1984-06-18

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Legal Events

Date Code Title Description
PS Patent sealed [section 19, patents act 1949]
732 Registration of transactions, instruments or events in the register (sect. 32/1977)
PE20 Patent expired after termination of 20 years