US2964881A - Method of making a conductive vitreous seal - Google Patents

Method of making a conductive vitreous seal Download PDF

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Publication number
US2964881A
US2964881A US618303A US61830356A US2964881A US 2964881 A US2964881 A US 2964881A US 618303 A US618303 A US 618303A US 61830356 A US61830356 A US 61830356A US 2964881 A US2964881 A US 2964881A
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US
United States
Prior art keywords
conductive
strips
strip
seal
metal
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
US618303A
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English (en)
Inventor
Johannes Cornelis Janssen
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.)
Koninklijke Philips NV
North American Philips Co Inc
Original Assignee
Philips Gloeilampenfabrieken NV
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 Philips Gloeilampenfabrieken NV filed Critical Philips Gloeilampenfabrieken NV
Application granted granted Critical
Publication of US2964881A publication Critical patent/US2964881A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • 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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B64—AIRCRAFT; AVIATION; COSMONAUTICS
    • B64C—AEROPLANES; HELICOPTERS
    • B64C25/00—Alighting gear
    • B64C25/02—Undercarriages
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B64—AIRCRAFT; AVIATION; COSMONAUTICS
    • B64C—AEROPLANES; HELICOPTERS
    • B64C25/00—Alighting gear
    • B64C25/32—Alighting gear characterised by elements which contact the ground or similar surface 
    • B64C25/34—Alighting gear characterised by elements which contact the ground or similar surface  wheeled type, e.g. multi-wheeled bogies
    • 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
    • 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
    • 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
    • H01J5/20—Seals between parts of vessels
    • 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
    • H01J5/32—Seals for leading-in conductors
    • H01J5/44—Annular seals disposed between the ends of the vessel
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J2893/00—Discharge tubes and lamps
    • H01J2893/0033—Vacuum connection techniques applicable to discharge tubes and lamps
    • H01J2893/0037—Solid sealing members other than lamp bases

Definitions

  • FIG.2A H62 7 JANSSEN Y AQEIZ United States Patent ice 2,964,881
  • This invention relates to a method of sealing together glass, ceramic, or metal parts, suchas parts making up the envelope of a cathode-ray tube. It relates in particular to a method for forming'such seals with conductive links across the seal area to connect together condudtive layers or surfaces of the partsithus joined. It is frequently desirable in manufacturing envelopes for cathode-ray tubes to form the envelope in several sections, one being a funnel-shaped section made of either metal or vglass and another being a more'or less concave glass faceplate sealed to the open end of the funnel.
  • the funnel section is made out of glass, to provide a conductive. coatingon its inner surface, and it is growing increasingly "common in the cathode-ray tube industry to provide a conductive layer across the inside surface 'of the glass faceplate and to connect this layer electrically to the conductive coating on the inside of the funnel or to the funnel itself, if that element bemade out of metal.
  • the primary object of the invention is to provide a sealing method using powered vitreous materiaL-such as glaze or enamel, which has a" relatively low meltingpoint to seal glass, 'metal,or ceramic'parts together and simultaneously to produce aconductive connection across the seal-so as to permit conductive surfaces on the two "elements thus joined to beconductive'ly -connected*togethe'r withoutthe necessity of additional connecting links.
  • powered vitreous materiaL- such as glaze or enamel
  • Fig. 1 shows a cathode-ray tube constructed according to the method of the invention, parts of the cathode-ray tube being shown broken away; 7
  • Figs. 2 and2a show fragments of the sections of the tube in Fig. 1 immediately prior to their being joined together;
  • Fig. 3 shows the sections of Fig. 2 joined together.
  • cathoderay tubes Although it will be obvious to those skilled in the art that it is equally applicable to the formation of other structures and that the example of cathode-ray tubes is chosen only to give a concrete descriptionand not to limit the scope.
  • one or more strips of metal paste is applied to each of the sections.
  • Each strip overlaps the conductive coatingof the section to which it is applied and extends from the conductive coating at least to the edge of the rim of the section.
  • a layer of powdered vitreous material, also called glaze is then laid on the rim of at least one of thesections in a layer which completely covers the entire circumference of that rim, including the part of the circumference to which the strip of metal 'paste was previously applied.
  • Fig. l shows a complete cathode-ray tube the sections of which'have been scaled together according to the invention.
  • Thetube comprises a glass faceplate 1 in the form of a-shallow dish the edge of which is sealed to a glass funnel 2 which in turn is sealed to a neck 3 that contains anclectron gun (not shown).
  • the innersurface of the faceplate 1- is covered with a layer 11 of fluorescent material which 'in turn iscovered with a layer 4'of conductive material such as aluminium.
  • the inner surface of the conical section 2 is covered with a conductive layer 5 such as graphite.
  • Fig. Zand 3 shows a cross section of a small fragment of the faceplate 1 and the cone 2.
  • Fig. 2 it will be seen that neither the conductive coating 4 on the faceplate' section 1 nor' order that there be a continuous conductive surface from the conical wall to'the innersurface of tlie faceplate. is applied to the cone section 2 extending from the conductive coating 5 up to the edge 13 of the rim 14 and across the rim and down on the outside to a contact member 7 which adheres firmly to the outer wall of the cone section 2and serves as a receptacle for a high voltage connection after the tube is completed.
  • a similar strip 8 is applied to the faceplate section 1 and extends from the conductive layer 4 down to and across the rim 15.
  • the strips 6 and S are formed of metallic paste such as silver paste or paste made up of a suspension of gold or platinum in a colloidal state in an appropriate suspension medium.
  • a layer of vitreous material or glaze 9 which consists of a suspension of' glaze power in a liquid such as water is then placed on the rim of one of the sections, in this case the cone section 2. This glaze, which'is the sealing material, extends completely around the circumference of the cone and is laid right on top of each of the strips 6 of metallic paste.
  • the conductive bridge not pass through the wall of the tube to the outside thereof but simply extend across the seal on the inside of the tube it is only necessary to cover the inner surfaces of faceplate 1- and cone 2 to the edge of their rims with the strips 8 and 6, respectively as shown in Fig. 2a, and not to extend the strips 6 and 8 across to the outside edges of the rims as is shown in Figs 2 and 3.
  • the conductive bridge will not extend through the outer surface of the tube and it will therefore be possible to cover the outer surface of the tube, even in the seal area, with the usual conductive coating which together with the conductive coating 4 and 5 forms a filter capacitor for the high voltage supply connected to the contact member 7.
  • a method of sealing the rims of two members together to form a unitary structure at least one of said members being composed of vitreous material and having a conductive surface portion on one side thereof,
  • the other member being conductive
  • said method comprising the steps of coating a portion of said side with a paste containing finely-divided metal in a suspension to form a strip overlapping and making contact with the conductive surface thereon and extending at least to an edge of the rim of said member; covering the entire rim of one of said members with a suspension of powdered vitreous material; pressing said rims together to compress said powdered vitreous material; and heating said strip and said vitreous material to seal said members together and simultaneously to decompose the paste and release metal particles therefrom which diffuse into the contiguous portion of said vitreous material between said conductive surface and the other member.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Ceramic Engineering (AREA)
  • Geochemistry & Mineralogy (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • General Chemical & Material Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Materials Engineering (AREA)
  • Organic Chemistry (AREA)
  • Mechanical Engineering (AREA)
  • Aviation & Aerospace Engineering (AREA)
  • Vessels, Lead-In Wires, Accessory Apparatuses For Cathode-Ray Tubes (AREA)
  • Glass Compositions (AREA)
  • Ceramic Products (AREA)
US618303A 1955-11-03 1956-10-25 Method of making a conductive vitreous seal Expired - Lifetime US2964881A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
NL201729A NL88285C (nl) 1955-11-03 1955-11-03 Werkwijze tot het door middel van glasachtig materiaal met een laag smeltpunt aan elkaar verbinden van delen van een vacuümvat, en vacuümvat vervaardigd volgens deze werkwijze

Publications (1)

Publication Number Publication Date
US2964881A true US2964881A (en) 1960-12-20

Family

ID=38526776

Family Applications (1)

Application Number Title Priority Date Filing Date
US618303A Expired - Lifetime US2964881A (en) 1955-11-03 1956-10-25 Method of making a conductive vitreous seal

Country Status (8)

Country Link
US (1) US2964881A (fr)
BE (1) BE552311A (fr)
CH (1) CH347270A (fr)
DE (1) DE1023569B (fr)
ES (1) ES232971A1 (fr)
FR (1) FR1161292A (fr)
GB (1) GB826761A (fr)
NL (1) NL88285C (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3119172A (en) * 1959-05-15 1964-01-28 Jerome J M Mazenko Method of making an electrical connection
US3281309A (en) * 1961-12-12 1966-10-25 Gen Electric Ceramic bonding

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2202367A (en) * 1987-03-18 1988-09-21 Philips Electronic Associated Channel plate electron multipliers

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US485478A (en) * 1892-11-01 Lard administratrix of said edward pollard
US2198769A (en) * 1938-07-12 1940-04-30 Fed Telegraph Co Metal to glass seal
US2321840A (en) * 1942-01-23 1943-06-15 Gen Motors Corp Spark plug and method of making same
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
US2670572A (en) * 1950-08-22 1954-03-02 Firth Vickers Stainless Steels Ltd Method of making glass-to-metal seals
US2768475A (en) * 1952-11-28 1956-10-30 Rca Corp Method of making glass-to-metal seal
US2808448A (en) * 1951-02-26 1957-10-01 Csf Glass to metal seal for high-frequency electronic tubes

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US485478A (en) * 1892-11-01 Lard administratrix of said edward pollard
US2198769A (en) * 1938-07-12 1940-04-30 Fed Telegraph Co Metal to glass seal
US2321840A (en) * 1942-01-23 1943-06-15 Gen Motors Corp Spark plug and method of making same
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
US2670572A (en) * 1950-08-22 1954-03-02 Firth Vickers Stainless Steels Ltd Method of making glass-to-metal seals
US2808448A (en) * 1951-02-26 1957-10-01 Csf Glass to metal seal for high-frequency electronic tubes
US2768475A (en) * 1952-11-28 1956-10-30 Rca Corp Method of making glass-to-metal seal

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3119172A (en) * 1959-05-15 1964-01-28 Jerome J M Mazenko Method of making an electrical connection
US3281309A (en) * 1961-12-12 1966-10-25 Gen Electric Ceramic bonding

Also Published As

Publication number Publication date
BE552311A (fr) 1959-12-31
NL88285C (nl) 1958-05-16
ES232971A1 (es) 1957-07-01
FR1161292A (fr) 1958-08-25
DE1023569B (de) 1958-01-30
GB826761A (en) 1960-01-20
CH347270A (de) 1960-06-30

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