US2269156A - Lead-in seal - Google Patents

Lead-in seal Download PDF

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Publication number
US2269156A
US2269156A US331792A US33179240A US2269156A US 2269156 A US2269156 A US 2269156A US 331792 A US331792 A US 331792A US 33179240 A US33179240 A US 33179240A US 2269156 A US2269156 A US 2269156A
Authority
US
United States
Prior art keywords
wall
foil
vitreous
conducting
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 - Lifetime
Application number
US331792A
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English (en)
Inventor
August J Kling
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.)
General Electric Co
Original Assignee
General Electric 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
Application filed by General Electric Co filed Critical General Electric Co
Priority to US331792A priority Critical patent/US2269156A/en
Priority to DEA9168D priority patent/DE907808C/de
Priority to FR878135D priority patent/FR878135A/fr
Priority to NL103373A priority patent/NL66651C/xx
Application granted granted Critical
Publication of US2269156A publication Critical patent/US2269156A/en
Priority to BE444189D priority patent/BE444189A/xx
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
    • 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
    • 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
    • C03C27/02—Joining pieces of glass to pieces of other inorganic material; Joining glass to glass other than by fusing by fusing glass directly to metal

Definitions

  • This invention relates to seals having means to carry current through the walls of vitreous vessels, such for example, as cathode ray tubes, and has for an object to provide an improved type of seal for carrying current through the vitreous walls of a sealed vessel where a compact structure which imposes minimum strain on the wall is necessary.
  • Fig. 1 illustrates a portion of a tubular vitreous vessel I0, which may, for example, be made of glass or quartz, having a ribbon II of metal foil passing therethrough at one point.
  • the ends of the foil which suitably consists of platinum, are bent over to lie continguous with the wall of the vessel.
  • This foil must have a thickness considerably less than one mil and is preferably about fifteen-hundredths to twenty-hundredths of a mil thick.
  • the use of a conductor with such limited transverse dimensions is desirable to avoid any strain on the wall I0 through which the foil II is sealed.
  • the process by which this foil II is sealed through the wall III comprises first, melting a hole through the wall I0 sufliciently large to allow the foil II to pass therethrough and, second, rescaling the wall III, with or without additional vitreous material, around the foil I I to restore the original uniform shape of the wall. After the ribbon II has been sealed within the wall, the
  • a coating I2 of a conducting material is applied over the portion of the foil I I externally accessible and lying contiguous to the wall.
  • This coating I2 is adapted to provide mechanical protection for the foil while at the same time being capable of conducting current thereto.
  • Conducting coatings such as described above, are well known and may, for example, comprise a mixture of oil solvent, low melting point glass, and metal powder. After being painted in place, such paints are baked on and the solvent is burned away to leave a vitreous mass, which is nevertheless conducting since it is impregnated with metal.
  • Metals suitable for mixture in such paints are gold, silver, platinum, and the like.
  • Certain types of such conducting paints have no glass therein and include essential oils and chlorides of the metal desired. During firing, the oils burn away and a very hard, bright coating of the metal remains, which is burned into the vitreous material on which it is fired. Such lat ter coatings are much lighter than those containing glass.
  • the seal provides a mechanically rugged and reliable means for carrying current through the wall of a sealed vitreous vessel.
  • Fig. 3 a modification of the above-described seal is shown wherein, in addition to the single foil II, which is embedded partially within the wall I0, there is supplied an additional foil I3 of similar form.
  • the hole melted through the wall I0 must be sufiiciently big to accommodate both the ribbons II and I3, spaced apart a small distance.
  • vitreous material is added not only around and between the ribbons II and I3, but is also added on the exterior of the wall I0, so that the surface of the wall is caused locally to assume the shape of a knob I4.
  • the knob I4 is not, however, made sufficiently large to cover the projecting end portions I5 and I6 of the ribbons II and I3.
  • a coating I! of conducting material is applied over the knob I4 and Subsequently,
  • a conducting path extends from such a spring clip to the conducting coating to the projecting end portions l5 and I3, and thence through the ribbons I I and I3 to the interior of the glass tube III.
  • Fig. 4 there is illustrated a partially completed seal in which six portions of foil l8, I9, 20, 2
  • Fig. 5 illustrates a structure in which it is desirable to make a seal having substantial mechanical strength for mounting elements on the interior of a vitreous vessel.
  • a portion 24 of foil is welded or otherwise fastened to a small, relatively heavy piece of metal 25.
  • the foil 24 and piece of metal 25 are sealed through the glass wall I0 so that the foil projects on the exterior and the piece of metal 25 on the interior.
  • a coating of vitreous conducting paint 26 may be spread over the unembedded portion of the foil 24 to form the exterior connection.
  • the piece of metal 25 is embedded in the wall I 0 only enough to form an internal connection with considerable mechanical strength.
  • the foil 2'! at the exterior of the glass tube In may make connection with a coating of conducting material on a glass knob III, similar to the knob i4 and coating 11 illustrated in Fig. 3.
  • a flush seal may be utilized on both sidesof the tube ID in Fig. 5.
  • Fig. 6 illustrates a very convenient means of providing a seal for carrying current to a metal disk 32, which is sealed in the glass tube It so as to close the passage therethrough except for a small aperture 33 in the center of the disk 32.
  • a sea l of the form illustrated by Fig. 1 may prove useful if it be desired to provide a structure suitable for use in small space, since the ribbon foil H and the conducting coating J2 do not project substantially on the exterior of the tube Ill.
  • the interior pressed-down projecting end of the foil ii is covered with a 28 ample me- -coating 34 of conducting paint, which also ex- 7 tends for a small distance on the wall I0 and upon disk 32 to make a conductive connection thereto. Current may therefore fiow from the disk 32 through the coating 34 and ribbon foil II, and through the coating i2 to any desired connecting means.
  • means for conducting current therethrough comprising a refractory metal foil embedded in said wall, said foil having an externally accessible portion following the contour of said wall and lying contiguous thereto, a vitreous projection formed integrally with said wall and adjacent said externally accessible portion, said projection being shaped to facilitate making a mechanical connection thereto, and a coating of conducting material over said projection and said externally accessible portion providing mechanical protection for said foil, whereby there is a conducting path from said foil through the coating on said projection.
  • vitreous maten'aL- means for conducting current therethrough comprising a conductor embedded in said wall having an externally accessible portion following the contour of said wall and lying contiguous thereto, said conductor having a transverse dimension so small as not to impose appreciable strain on the vitreous material by its presence therein, a vitreous projection formed integrally with said wall and partially covering the externally accessible portion of said conductor, said projection being shaped to facilitate making a mechanical connection thereto, a coating of conducting material over said projection and said externally accessible portion providing mechanical protection for said conductor, said current conducting means providing a conducting path through said conductor and through said coating.
  • means for conducting current therethrough comprising a-metal foil embedded in said wall, said foil having an externally accessible portion following the contour of said wall and lying contiguous thereto, said foil being of limited thickness so as not to impose appreciable strain on the vitreous material by its presence therein, a vitreous projection formed integrally with said wall and partially covering said externally accessible portion, said projection having an enlarged end portion and a reduced shank portion shaped to facilitate making mechanical connection thereto, and a coating of conducting material over the uncovered part of said foil and over said projection to provide mechanical protection for said foil, said current conducting means providing a conducting path through said foil and said coating.
  • means for conducting current therethrough comprising a metal foil embedded in said wall, said metal foil having an externally accessible portion following the contour of the wall and lying contiguous thereto, said foil being of limited thickness so as not to impose appreciable strain on the vitreous material by its presence therein, a vitreous projection formed integrally with said wall and partially covering said externally accessible portion, said projection being shaped to facilitate making mechanical connection thereto, a coating of conducting material over said projection and said external-' sible end portion following the contour of the outer surface of said wall and lying contiguous thereto, said foil being of limited thickness so as not to impose appreciable strain on the vitreous material by its presence therein, a vitreous projection formed integrally with said wall and adjacent said externally accessible portion, said projection being shaped to facilitate making me chanical connection thereto, a coating of conducting material over said projection and over said adjacent externally accessible portion to provide mechanical protection therefor, an electrical device supported between said opposed walls and
  • means for conducting current therethrough comprising a conductor embedded therein, said conductor having an externally accessible portion following the contour of the adjacent surface of said body and lying contiguous thereto, a vitreous projection integral with said body adjacent said externally accessible portion, said projection being shaped to facilitate making a mechanical connection thereto, and a coating of conducting material over said projection and said externally accessible portion providing mechanical protection for said conductor, whereby a conducting path is formed from said conductor through said coating to the mechanical connection upon said projection.
  • means for conducting current therethrough comprising a conductor embedded therein, said conductor having an externally accessible portion following the contour of the adjacent surface of said body and lying contiguous thereto, and a vitreous projection integral with said body adjacent said externally accessible portion, said projection being of knob-like form, thereby to facilitate the mechanical attachment of a terminal clip to said body and to hold the terminal clip in a position adjacent said body and said conductor.
  • An electron discharge device comprising an envelope of insulating material, a hole in the wall of the envelope, metallic means contiguous with the side of said hole having portions following contiguously the external contour of the surfaces of said wall adjacent said hole, and a plug sealed gas-tight in said hole.
  • a lead-in connection through a wall of insulating material comprising a hole through the wall, a conductor through the hole contiguous with a side thereof and following contiguously' the external contour of the wall adjacent the hole, and a mass of sealing material fixed in gastight union with the sides of the hole.
  • a lead-in connection through a wall of insulating material comprising a hole through the wall, conducting means on the opposite exposed surfaces of the wall and on a side of said hole, a
  • such means being disposed in continuous conductive relation, and means hermetically sealing said hole.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Ceramic Engineering (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)
  • Vessels And Coating Films For Discharge Lamps (AREA)
US331792A 1940-04-26 1940-04-26 Lead-in seal Expired - Lifetime US2269156A (en)

Priority Applications (5)

Application Number Priority Date Filing Date Title
US331792A US2269156A (en) 1940-04-26 1940-04-26 Lead-in seal
DEA9168D DE907808C (de) 1940-04-26 1941-04-26 Stromdurchfuehrung durch Waende aus Glas oder Quarz
FR878135D FR878135A (fr) 1940-04-26 1941-09-12 Perfectionnements aux scellements de conducteurs d'amenée de courant
NL103373A NL66651C (enrdf_load_stackoverflow) 1940-04-26 1941-10-25
BE444189D BE444189A (enrdf_load_stackoverflow) 1940-04-26 1942-01-17

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US331792A US2269156A (en) 1940-04-26 1940-04-26 Lead-in seal

Publications (1)

Publication Number Publication Date
US2269156A true US2269156A (en) 1942-01-06

Family

ID=23295399

Family Applications (1)

Application Number Title Priority Date Filing Date
US331792A Expired - Lifetime US2269156A (en) 1940-04-26 1940-04-26 Lead-in seal

Country Status (5)

Country Link
US (1) US2269156A (enrdf_load_stackoverflow)
BE (1) BE444189A (enrdf_load_stackoverflow)
DE (1) DE907808C (enrdf_load_stackoverflow)
FR (1) FR878135A (enrdf_load_stackoverflow)
NL (1) NL66651C (enrdf_load_stackoverflow)

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2448808A (en) * 1945-05-02 1948-09-07 Du Mont Allen B Lab Inc Contact terminal for vacuum tubes
US2452582A (en) * 1943-12-22 1948-11-02 Standard Telephones Cables Ltd Lead connector for electronic discharge devices
US2562163A (en) * 1949-03-01 1951-07-31 Philips Lab Inc Electric discharge tube
DE1103662B (de) * 1957-11-15 1961-03-30 Max Birngrube K G Verschlussschnalle, insbesondere fuer Sicherheitsgurte
US3214631A (en) * 1962-08-06 1965-10-26 Tektronix Inc Tube having target with store and/or non-store sections
US3379822A (en) * 1964-07-18 1968-04-23 Philips Corp Electric conductor suitable for being sealed in the wall of an electric discharge tube
US3432803A (en) * 1968-02-15 1969-03-11 Philco Ford Corp High voltage connection for cathode ray tube

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2452582A (en) * 1943-12-22 1948-11-02 Standard Telephones Cables Ltd Lead connector for electronic discharge devices
US2448808A (en) * 1945-05-02 1948-09-07 Du Mont Allen B Lab Inc Contact terminal for vacuum tubes
US2562163A (en) * 1949-03-01 1951-07-31 Philips Lab Inc Electric discharge tube
DE1103662B (de) * 1957-11-15 1961-03-30 Max Birngrube K G Verschlussschnalle, insbesondere fuer Sicherheitsgurte
US3214631A (en) * 1962-08-06 1965-10-26 Tektronix Inc Tube having target with store and/or non-store sections
US3379822A (en) * 1964-07-18 1968-04-23 Philips Corp Electric conductor suitable for being sealed in the wall of an electric discharge tube
US3432803A (en) * 1968-02-15 1969-03-11 Philco Ford Corp High voltage connection for cathode ray tube

Also Published As

Publication number Publication date
FR878135A (fr) 1943-01-12
DE907808C (de) 1954-03-29
BE444189A (enrdf_load_stackoverflow) 1942-04-30
NL66651C (enrdf_load_stackoverflow) 1950-11-15

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