US2820166A - Conductive medium for anode button in a cathode ray tube - Google Patents

Conductive medium for anode button in a cathode ray tube Download PDF

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Publication number
US2820166A
US2820166A US509169A US50916955A US2820166A US 2820166 A US2820166 A US 2820166A US 509169 A US509169 A US 509169A US 50916955 A US50916955 A US 50916955A US 2820166 A US2820166 A US 2820166A
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US
United States
Prior art keywords
button
glass
internal
conductive coating
film
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 - Lifetime
Application number
US509169A
Other languages
English (en)
Inventor
Alfred D Pinotti
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.)
OI Glass Inc
Original Assignee
Owens Illinois Glass Co
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
Priority to NL101817D priority Critical patent/NL101817C/xx
Application filed by Owens Illinois Glass Co filed Critical Owens Illinois Glass Co
Priority to US509169A priority patent/US2820166A/en
Priority to DEO4882A priority patent/DE1031433B/de
Priority to FR1150194D priority patent/FR1150194A/fr
Priority to GB15490/56A priority patent/GB792489A/en
Application granted granted Critical
Publication of US2820166A publication Critical patent/US2820166A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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
    • H01J29/92—Means forming part of the tube for the purpose of providing electrical connection to it
    • H01J29/925—High voltage anode feedthrough connectors for display tubes
    • C—CHEMISTRY; METALLURGY
    • C03—GLASS; MINERAL OR SLAG WOOL
    • C03C—CHEMICAL COMPOSITION OF GLASSES, GLAZES OR VITREOUS ENAMELS; SURFACE TREATMENT OF GLASS; SURFACE TREATMENT OF FIBRES OR FILAMENTS MADE FROM GLASS, MINERALS OR SLAGS; JOINING GLASS TO GLASS OR OTHER MATERIALS
    • C03C27/00—Joining pieces of glass to pieces of other inorganic material; Joining glass to glass other than by fusing
    • C03C27/04—Joining glass to metal by means of an interlayer
    • C03C27/042—Joining glass to metal by means of an interlayer consisting of a combination of materials selected from glass, glass-ceramic or ceramic material with metals, metal oxides or metal salts
    • C03C27/046—Joining glass to metal by means of an interlayer consisting of a combination of materials selected from glass, glass-ceramic or ceramic material with metals, metal oxides or metal salts of metals, metal oxides or metal salts only
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
    • H01B1/00—Conductors or conductive bodies characterised by the conductive materials; Selection of materials as conductors
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
    • H01B1/00—Conductors or conductive bodies characterised by the conductive materials; Selection of materials as conductors
    • H01B1/06—Conductors or conductive bodies characterised by the conductive materials; Selection of materials as conductors mainly consisting of other non-metallic substances
    • H01B1/08—Conductors or conductive bodies characterised by the conductive materials; Selection of materials as conductors mainly consisting of other non-metallic substances oxides
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01C—RESISTORS
    • H01C1/00—Details
    • H01C1/14—Terminals or tapping points or electrodes specially adapted for resistors; Arrangements of terminals or tapping points or electrodes on resistors
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J5/00—Details relating to vessels or to leading-in conductors common to two or more basic types of discharge tubes or lamps
    • H01J5/50—Means forming part of the tube or lamps for the purpose of providing electrical connection to it
    • H01J5/54—Means forming part of the tube or lamps for the purpose of providing electrical connection to it supported by a separate part, e.g. base

Definitions

  • This invention relates to cathode ray tubes and more specifically to a conductive medium for providing improved contact between the anode button and the internal conductive coating of a cathode ray tube.
  • the anode button furnishes an electrical circuit from within the internal surface of the tube envelope to an external source.
  • the anode *but'ton extends through the tube wall generally in or near its funnel section to contact the conductive coating which normally lines the inner surface areas of the -tube. Poor or interrupted electrical contact between the -wall in a limited area surrounding the anodebutton.
  • the principal'object of this invention is to provideand insure a good conductive medium between the anode button and the usual or general internal conductive coating of 'a cathode ray tube to improve their electrical conductivity.
  • Fig. 1 is a fragmentary view of a cathode ray tube, the conductive film being shown as an elliptical broken line;
  • Fig. 2 is a view taken on line 2-2 of Fig. 1.
  • Fig. 1 the usual monochrome cathode ate-n "ice ray tube 10 with its envelope fabricated of glass. 'The complete tube is not shown but only the face plate 11 and the major portion of the funnel 12.
  • the face plate 11 and funnel 12 are formed separately as individual glass parts and are fused or joined together along with a neck section (not shown) to form the complete tube envelope.
  • An anode button 13 consisting of a hollow metallic disk having a frusto-conical shape is positioned in the large conical shaped funnel 12.
  • the anode button 13 is' hermetically sealed in the glass wall of the funnel 12 by locally heating a small area of the glass to a temperature above its deformation point, punching a hole in the center of the heated area, inserting the small metallic lanod'e button 13 within the hole and sealing together the button and the'edges of the softened glass.
  • the heated area of the glass tends to deform in the directionof gravitational pull while above its deformation point and causes the button 13 and the-surrounding hot glass of the funnel 12 to sag out of the desired finished plane.
  • a conductive metallic film 14 is provided on the internal surface of the button 13 and the surrounding irregular surface of the glass funnel 12. Such filmmay extend from the button 13 over any desired area of the internal surface areas of the tube.
  • the metallic film 14 which consists of a composition of tin and antimony oxides may be conveniently sprayed, fumed 'or otherwise applied over the internal surfaces of the button 13 and the internalsurface areas of the glass generally while'th'ey are at elevated temperatures.
  • the metallic film'14 may b'eapplied immediately following the button sealing operation. This operatiomrnay, if desired, be performed on the individual funnel 12 prior to joining the component parts of the glass envelope when the internal surfaces of the funnel 12 "surrounding the button 13 are readily accessible.
  • the metallic film 14 which may be applied in liquid phase over the metallic button and glass unites with both the buttonand glass to become .an adherent part thereof of uniform thickness.
  • the film 14 is extremely thin, and may be only several microns in thickness extending radially from the button 13.
  • the elevated temperature of the glass in the area of the button 13 during the button sealing operation furnishes a very suitable condition for the application of the metallic film 14.
  • the radially extending pattern of the film 14 reaches from the button 13 to include all wave-like formations adjacent to the button.
  • a composition of the metallic film 14 which has been found to produce a very satisfactory conductive medium consists of tin oxide and 5% antimony oxide.
  • the composition of the metallic film 14 may be varied widely using other metallic oxides such as tin and indium, tin and iron, etc., but the above mentioned composition which is normally used in the production of iridescent films has excellent properties for this purpose. However, such film may be solely of a tin oxide or other conductive oxide.
  • the coating 15 usually consists of a graphite solution commonly referred to as aquadag, although the internal surfaces may also be aluminized to similarly provide an inner conductive coating.
  • the coating 15 on the uneven wavy surface surrounding the button 13 varies in thickness, being thinner at the peaks of the waves where it is more likely to crack and break electrical contact. Because of this irregularity and the nature of the normal aquadag coating, there is a tendency for the conductivity of the coating in this faulty area to vary or be of irregular electrical resistance. In my invention the tendency of the conductive coating 15 to break contact is eliminated.
  • the metallic film 14 makes positive contact with the internal surface of the button 13 as well as the surrounding glass and is of uniform thickness to provide a radial pattern of nearly equal conductivity.
  • the film 14 furnishes an internal metallic surface of increased size to contact the conductive coating 15 over a greater area.
  • the properties of the composition of the conductive coating 15 are not as narrowly limited by the use of the metallic film 14.
  • the deleterious cracking effect of the coating 15 is minimized by improved contact with the anode button 13.
  • the conductive coating 15 may consist of graphite, an aluminum film or other materials normally used as the coating which will adhere to both the glass and metal surfaces. Any of the coatings which will adhere to the metallic anode button 13 will likewise adhere to the metallic film 14.
  • a superior contact is obtained by using the intermediate metallic film 14 to conduct electrical charges from the large surface of the coating 15 to a much smaller terminal, the anode button 13.
  • An electrical contact device in a hollow glass body which comprises a hollow metal button sealed into the wall of said glass body for exposure at opposite sides of said wall, a conductive coating over the major internal surface of said hollow glass body adapted to provide an electrical potential, a thin metallic film overlying the inner surface of said button and any surrounding localized surface irregularities in the internal glass surface, said film being interposed between said conductive coating and said button and between said conductive coating and the internal glass surface.
  • FIG. 4 including a thin metallic film 2.
  • An electrical contact device in a hollow glass body which comprises a hollow metal button sealed into the wall of said glass body with its planular surfaces exposed on opposite sides of said wall, a conductive coating over the major internal surfaces of said hollow glass body adapted to provide an electrical potential, a thin metallic film extending radially from said button over a localized circular area of the internal glass surface, said film composed of tin and antimony forming an interface between said localized area of the internal glass surface with said button as its center and said internal conductive coating of the glass body.
  • An electrical contact device in a hollow glass body which has portions of its internal surface coated with a conductive coating, which device comprises a hollow metallic button extending through and sealed into a wall of said glass body with its planular surfaces exposed parallel to the surfaces of the glass wall and having a thin metallic film composed of at least one metallic oxide extending radially from said button over the adjacent internal surfaces of the glass body, said film located between said internal conductive coating and the circular uneven surface of the glass surrounding said metallic button.
  • An electrical contact device in the wall of a hollow glass body which device comprises a hollow metallic button having a frusto-conical shape with its apex pointing inward, said button sealed into the glass wall with major portions of its planular surfaces exposed to provide contacting surfaces, a thin metallic film composed of tin and antimony oxides contacting said button on its exposed internal surface and extending over the irregular glass surface surrounding said button and a further conductive coating over the major portion of the internal surfaces of the glass body and the localized circular pattern of said metallic film.
  • An electrical contact device in accordance with composed of approximately percent tin oxide and 5 percent antimony oxide.
  • An electrical contact device in accordance with claim 4 including a conductive coating of aluminum.
  • a conductive element sealed in and extending through a wall of said tube, a metallic oxide film extending fromsaid conductive element beyond an irregular surface area surrounding said button.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Ceramic Engineering (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • General Chemical & Material Sciences (AREA)
  • Geochemistry & Mineralogy (AREA)
  • Materials Engineering (AREA)
  • Organic Chemistry (AREA)
  • Vessels, Lead-In Wires, Accessory Apparatuses For Cathode-Ray Tubes (AREA)
US509169A 1955-05-18 1955-05-18 Conductive medium for anode button in a cathode ray tube Expired - Lifetime US2820166A (en)

Priority Applications (5)

Application Number Priority Date Filing Date Title
NL101817D NL101817C (enrdf_load_stackoverflow) 1955-05-18
US509169A US2820166A (en) 1955-05-18 1955-05-18 Conductive medium for anode button in a cathode ray tube
DEO4882A DE1031433B (de) 1955-05-18 1956-05-17 Kathodenstrahlroehre mit einem Glaskonus
FR1150194D FR1150194A (fr) 1955-05-18 1956-05-18 Milieu conducteur pour borne d'anode d'un tube à rayons cathodiques
GB15490/56A GB792489A (en) 1955-05-18 1956-05-18 Improvements in or relating to electrical contact devices

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US509169A US2820166A (en) 1955-05-18 1955-05-18 Conductive medium for anode button in a cathode ray tube

Publications (1)

Publication Number Publication Date
US2820166A true US2820166A (en) 1958-01-14

Family

ID=24025586

Family Applications (1)

Application Number Title Priority Date Filing Date
US509169A Expired - Lifetime US2820166A (en) 1955-05-18 1955-05-18 Conductive medium for anode button in a cathode ray tube

Country Status (5)

Country Link
US (1) US2820166A (enrdf_load_stackoverflow)
DE (1) DE1031433B (enrdf_load_stackoverflow)
FR (1) FR1150194A (enrdf_load_stackoverflow)
GB (1) GB792489A (enrdf_load_stackoverflow)
NL (1) NL101817C (enrdf_load_stackoverflow)

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2928968A (en) * 1959-02-27 1960-03-15 Paramount Pictures Corp Cathode-ray tube switching grid support system
US3543072A (en) * 1969-04-16 1970-11-24 Sylvania Electric Prod Color cathode ray tube with metallic contactor ribbon bonded on inside wall of tube between the high voltage terminal and the shadow mask frame
US3582978A (en) * 1969-08-28 1971-06-01 Tektronix Inc Rivet-shaped electrical lead-through contact
US3663862A (en) * 1970-04-30 1972-05-16 Rca Corp Method of rebuilding an evacuated electron tube
US3969647A (en) * 1973-11-28 1976-07-13 Gte Sylvania Incorporated Cathode ray tube electrical connective traversal incorporating internal shielding and contact means
US4119885A (en) * 1975-01-12 1978-10-10 U.S. Philips Corporation Cathode ray tube
FR2440611A1 (fr) * 1978-10-30 1980-05-30 Rca Corp Tube a rayons cathodiques et son procede de fabrication
US4638213A (en) * 1980-10-08 1987-01-20 Rca Corporation CRT with internal contact stripe or patch and method of making said stripe or patch
US5099171A (en) * 1988-08-08 1992-03-24 Nippon Electric Glass Co., Ltd. Cathode-ray tube panel having thin conductive film
FR2689313A1 (fr) * 1992-03-27 1993-10-01 Nokia Technology Gmbh Contact de raccordement d'anode pour tubes image.

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4198588A (en) 1977-08-01 1980-04-15 Tokyo Shibaura Denki Kabushiki Kaisha Anode button for a cathode ray tube
JP2557912B2 (ja) * 1987-11-07 1996-11-27 三菱電機株式会社 受像管
FR2975317B1 (fr) 2011-05-18 2013-05-31 Snecma Procede de fabrication par soudage diffusion d'une piece monobloc pour une turbomachine

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1859979A (en) * 1926-07-08 1932-05-24 Electro Metallurg De Montriche Electric furnace electrode
US2047030A (en) * 1932-11-23 1936-07-07 Rca Corp Cathode ray device
US2093699A (en) * 1932-03-08 1937-09-21 Farnsworth Television Inc Cathode ray tube
US2151992A (en) * 1934-11-30 1939-03-28 Firm Of Fernseh Ag Wall coating for braun tubes
US2508001A (en) * 1947-12-30 1950-05-16 Rca Corp High-voltage cathode-ray tube corona ring
US2562163A (en) * 1949-03-01 1951-07-31 Philips Lab Inc Electric discharge tube

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
BE519895A (enrdf_load_stackoverflow) * 1952-05-14

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1859979A (en) * 1926-07-08 1932-05-24 Electro Metallurg De Montriche Electric furnace electrode
US2093699A (en) * 1932-03-08 1937-09-21 Farnsworth Television Inc Cathode ray tube
US2047030A (en) * 1932-11-23 1936-07-07 Rca Corp Cathode ray device
US2151992A (en) * 1934-11-30 1939-03-28 Firm Of Fernseh Ag Wall coating for braun tubes
US2508001A (en) * 1947-12-30 1950-05-16 Rca Corp High-voltage cathode-ray tube corona ring
US2562163A (en) * 1949-03-01 1951-07-31 Philips Lab Inc Electric discharge tube

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2928968A (en) * 1959-02-27 1960-03-15 Paramount Pictures Corp Cathode-ray tube switching grid support system
US3543072A (en) * 1969-04-16 1970-11-24 Sylvania Electric Prod Color cathode ray tube with metallic contactor ribbon bonded on inside wall of tube between the high voltage terminal and the shadow mask frame
US3582978A (en) * 1969-08-28 1971-06-01 Tektronix Inc Rivet-shaped electrical lead-through contact
US3663862A (en) * 1970-04-30 1972-05-16 Rca Corp Method of rebuilding an evacuated electron tube
US3969647A (en) * 1973-11-28 1976-07-13 Gte Sylvania Incorporated Cathode ray tube electrical connective traversal incorporating internal shielding and contact means
US4119885A (en) * 1975-01-12 1978-10-10 U.S. Philips Corporation Cathode ray tube
FR2440611A1 (fr) * 1978-10-30 1980-05-30 Rca Corp Tube a rayons cathodiques et son procede de fabrication
US4232248A (en) * 1978-10-30 1980-11-04 Rca Corporation Internal metal stripe on conductive layer
US4638213A (en) * 1980-10-08 1987-01-20 Rca Corporation CRT with internal contact stripe or patch and method of making said stripe or patch
US5099171A (en) * 1988-08-08 1992-03-24 Nippon Electric Glass Co., Ltd. Cathode-ray tube panel having thin conductive film
FR2689313A1 (fr) * 1992-03-27 1993-10-01 Nokia Technology Gmbh Contact de raccordement d'anode pour tubes image.

Also Published As

Publication number Publication date
GB792489A (en) 1958-03-26
FR1150194A (fr) 1958-01-08
NL101817C (enrdf_load_stackoverflow)
DE1031433B (de) 1958-06-04

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