US2174913A - Joint for ceramic materials - Google Patents

Joint for ceramic materials Download PDF

Info

Publication number
US2174913A
US2174913A US264778A US26477839A US2174913A US 2174913 A US2174913 A US 2174913A US 264778 A US264778 A US 264778A US 26477839 A US26477839 A US 26477839A US 2174913 A US2174913 A US 2174913A
Authority
US
United States
Prior art keywords
insulator
joint
foil
plug
sleeve
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
US264778A
Inventor
Carington Charles Molyneux
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.)
K L G SPARKING PLUGS Ltd
Original Assignee
K L G SPARKING PLUGS Ltd
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 K L G SPARKING PLUGS Ltd filed Critical K L G SPARKING PLUGS Ltd
Application granted granted Critical
Publication of US2174913A publication Critical patent/US2174913A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01T—SPARK GAPS; OVERVOLTAGE ARRESTERS USING SPARK GAPS; SPARKING PLUGS; CORONA DEVICES; GENERATING IONS TO BE INTRODUCED INTO NON-ENCLOSED GASES
    • H01T13/00—Sparking plugs
    • H01T13/20—Sparking plugs characterised by features of the electrodes or insulation
    • H01T13/34—Sparking plugs characterised by features of the electrodes or insulation characterised by the mounting of electrodes in insulation, e.g. by embedding
    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B37/00—Joining burned ceramic articles with other burned ceramic articles or other articles by heating
    • C04B37/02—Joining burned ceramic articles with other burned ceramic articles or other articles by heating with metallic articles
    • C04B37/023—Joining burned ceramic articles with other burned ceramic articles or other articles by heating with metallic articles characterised by the interlayer used
    • C04B37/026—Joining burned ceramic articles with other burned ceramic articles or other articles by heating with metallic articles characterised by the interlayer used consisting of metals or metal salts
    • 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
    • H01J5/22—Vacuum-tight joints between parts of vessel
    • H01J5/26—Vacuum-tight joints between parts of vessel between insulating and conductive parts of vessel
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01T—SPARK GAPS; OVERVOLTAGE ARRESTERS USING SPARK GAPS; SPARKING PLUGS; CORONA DEVICES; GENERATING IONS TO BE INTRODUCED INTO NON-ENCLOSED GASES
    • H01T13/00—Sparking plugs
    • H01T13/20—Sparking plugs characterised by features of the electrodes or insulation
    • H01T13/38—Selection of materials for insulation
    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
    • C04B2235/60—Aspects relating to the preparation, properties or mechanical treatment of green bodies or pre-forms
    • C04B2235/604—Pressing at temperatures other than sintering temperatures
    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B2237/00—Aspects relating to ceramic laminates or to joining of ceramic articles with other articles by heating
    • C04B2237/02—Aspects relating to interlayers, e.g. used to join ceramic articles with other articles by heating
    • C04B2237/12—Metallic interlayers
    • C04B2237/121—Metallic interlayers based on aluminium
    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B2237/00—Aspects relating to ceramic laminates or to joining of ceramic articles with other articles by heating
    • C04B2237/30—Composition of layers of ceramic laminates or of ceramic or metallic articles to be joined by heating, e.g. Si substrates
    • C04B2237/32—Ceramic
    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B2237/00—Aspects relating to ceramic laminates or to joining of ceramic articles with other articles by heating
    • C04B2237/30—Composition of layers of ceramic laminates or of ceramic or metallic articles to be joined by heating, e.g. Si substrates
    • C04B2237/40—Metallic
    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B2237/00—Aspects relating to ceramic laminates or to joining of ceramic articles with other articles by heating
    • C04B2237/50—Processing aspects relating to ceramic laminates or to the joining of ceramic articles with other articles by heating
    • C04B2237/52—Pre-treatment of the joining surfaces, e.g. cleaning, machining
    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B2237/00—Aspects relating to ceramic laminates or to joining of ceramic articles with other articles by heating
    • C04B2237/50—Processing aspects relating to ceramic laminates or to the joining of ceramic articles with other articles by heating
    • C04B2237/62—Forming laminates or joined articles comprising holes, channels or other types of openings
    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B2237/00—Aspects relating to ceramic laminates or to joining of ceramic articles with other articles by heating
    • C04B2237/50—Processing aspects relating to ceramic laminates or to the joining of ceramic articles with other articles by heating
    • C04B2237/64—Forming laminates or joined articles comprising grooves or cuts
    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B2237/00—Aspects relating to ceramic laminates or to joining of ceramic articles with other articles by heating
    • C04B2237/50—Processing aspects relating to ceramic laminates or to the joining of ceramic articles with other articles by heating
    • C04B2237/70—Forming laminates or joined articles comprising layers of a specific, unusual thickness
    • C04B2237/704—Forming laminates or joined articles comprising layers of a specific, unusual thickness of one or more of the ceramic layers or articles
    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B2237/00—Aspects relating to ceramic laminates or to joining of ceramic articles with other articles by heating
    • C04B2237/50—Processing aspects relating to ceramic laminates or to the joining of ceramic articles with other articles by heating
    • C04B2237/70—Forming laminates or joined articles comprising layers of a specific, unusual thickness
    • C04B2237/708—Forming laminates or joined articles comprising layers of a specific, unusual thickness of one or more of the interlayers
    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B2237/00—Aspects relating to ceramic laminates or to joining of ceramic articles with other articles by heating
    • C04B2237/50—Processing aspects relating to ceramic laminates or to the joining of ceramic articles with other articles by heating
    • C04B2237/72—Forming laminates or joined articles comprising at least two interlayers directly next to each other
    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B2237/00—Aspects relating to ceramic laminates or to joining of ceramic articles with other articles by heating
    • C04B2237/50—Processing aspects relating to ceramic laminates or to the joining of ceramic articles with other articles by heating
    • C04B2237/76—Forming laminates or joined articles comprising at least one member in the form other than a sheet or disc, e.g. two tubes or a tube and a sheet or disc
    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B2237/00—Aspects relating to ceramic laminates or to joining of ceramic articles with other articles by heating
    • C04B2237/50—Processing aspects relating to ceramic laminates or to the joining of ceramic articles with other articles by heating
    • C04B2237/76—Forming laminates or joined articles comprising at least one member in the form other than a sheet or disc, e.g. two tubes or a tube and a sheet or disc
    • C04B2237/765—Forming laminates or joined articles comprising at least one member in the form other than a sheet or disc, e.g. two tubes or a tube and a sheet or disc at least one member being a tube
    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B2237/00—Aspects relating to ceramic laminates or to joining of ceramic articles with other articles by heating
    • C04B2237/50—Processing aspects relating to ceramic laminates or to the joining of ceramic articles with other articles by heating
    • C04B2237/78—Side-way connecting, e.g. connecting two plates through their sides
    • 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
    • H01J2893/0041—Direct connection between insulating and metal elements, in particular via glass material
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S277/00—Seal for a joint or juncture
    • Y10S277/935—Seal made of a particular material
    • Y10S277/939—Containing metal
    • Y10S277/941—Aluminum or copper

Definitions

  • This invention relates to joints for ceramic materials such as are used for the insulators of sparking-plugs.
  • the object of the invention is to provide a gastight joint between a metal part and a ceramic part; this has hitherto presented great difficulty owing to the difiiculty of obtaining a smooth or accurately-dimensioned ceramic surface.
  • the joint between a metal part and a ceramic part comprises two or more intervening layers of soft metal foil.
  • the foil is preferably extremely thin, that is to say, less than 35 of an inch thick. Where the invention is applied to a sparkingplug, the foil must be of metal which will not melt at the working temperature of the plug. Pure aluminium is found to be a suitable material, although other infusible metals could be used.
  • the insulator'of a sparking-plug comprises a metal collar or sleeve fitted to it in a gas-tight manner by the use of a joint as above described.
  • the detachable joint between the insulator and the body of the plug may thus be formed between the metal sleeve or collar and the body.
  • Figure 1 is a sectional elevation of an assem- 80 bled sparking-plug according to the invention
  • Figure 2 is a diagram explaining the manner in which the gas-tight joint is made between the insulator and the surrounding sleeve.
  • the sparking-plug comprises a tubular insulator ll! of the ceramic material sold under the registered trade-mark Corundite.”
  • the central electrode is assembled in the insulator and forms a firing point II at 1 one end and an electrical contact I! at the other.
  • the insulator is surrounded by a metal sleeve l3 which engages a recess in the body ll of the plug, the insulator being held in place by means of a gland nut l5 or extension tube which engages a metal washer l8 pressing down on to a suitable shoulder l'l formed on the insulator.
  • the plug is assembled in the following manner.
  • the insulator l0 which is formed with a tapering portion l8, as shown in Figure 2, is closely wrapped with about five layers of aluminium foil of about of a thousandth of an inch in thickness.
  • the foil l9 may be first cut to the required annular shape or, alternatively, the tapering portion' I! of the insulator may be first wrapped and 56 then the wrapped foil cut to the desired length.
  • a metal sleeve l3 having an internal taper corresponding to that of the portion I8 is then forced on to the foil-covered portion of the insulator under considerable pressure, such as a force of 200 lbs., or, in some circumstances, con- 5 sideraby more.
  • the wall thickness of the sleeve is preferably so small that the sleeve expands resiliently during the forcing operation whereby the foil is tightly gripped between the sleeve and the ceramic insulator.
  • a perfectly gas-tight joint is obtained between the sleeve and the insulator.
  • the joint between the sleeve and the surrounding body It is easily made gas-tight by accurately machining the co- 1 operating surfaces.
  • the gas-tight joint between the insulator and the foil and between the foil and the sleeve is maintained by the pressure of the nut IS on the shoulder ll of the insulator.
  • the drawing shows an insulator having a tapering portion [8 to which the foil is applied, the invention is also applicable to an insulator having a parallel surface.
  • a collar or sleeve may be drawn on to the foil-covered portion or may be swaged down to form the neces- 25 sary joint.
  • the invention also consists in providing a gastight joint between the electric contact I2 and the top end of the insulator In. This is achieved by threading a stack of washers 20 of thin aluminium foil, as hereinbefore described, on to the electric contact before this is screw-threaded into the insulator.
  • a joint between a metal part and a ceramic part comprising two or more intervening layers of soft metal foil.
  • a joint between ametal part and a ceramic 50 part comprising two or more intervening layers, each less than 35 of an inch thick, of soft metal foil.
  • a sparking-plug comprising a joint between the insulator and a surrounding metal part which joint comprises two or more intervening layers of soft metal foil.
  • a sparking-plug comprising an insulator, a part surrounding the insulator, and two or more intervening layers, each less than 2 of an inch thick, of soft metal foil.
  • a sparking-plug comprising an insulator, a surrounding metal part, and a plurality of intervening layers of aluminium foil.
  • a sparking-plug comprising a ceramic insulator, a surrounding metal part, and a plurality of intervening layers of soft metal foil 01 about A of a thousandth of an inch in thickness.
  • a sparking-plug comprising a tapering ceramic insulator and a surrounding complementary metal part, wherein the insulator and the metal part are separated by five layers of aluminium foil of about of a thousandth of an inch thick.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Ceramic Engineering (AREA)
  • Materials Engineering (AREA)
  • Structural Engineering (AREA)
  • Organic Chemistry (AREA)
  • Spark Plugs (AREA)

Description

' Oct. 3, 1939.
(1:..M. CARINGTON JOINT. FOR CERAMIC MATERIALS Filed March 29, 1959 d/iim,mv
Patented Oct. 3, 1939 PATENT OFFICE JOINT FOR CERAMIC MATERIALS Charles Moiyneux Carington, London, England, assignor to K. L. G. Sparking Plugs Limited,
London, England, a British company Application March 29, 1939, Serial No. 264,778 In Great Britain May 12, 1938 '1 Claims.
This invention relates to joints for ceramic materials such as are used for the insulators of sparking-plugs.
The object of the invention is to provide a gastight joint between a metal part and a ceramic part; this has hitherto presented great difficulty owing to the difiiculty of obtaining a smooth or accurately-dimensioned ceramic surface.
According to one feature of the invention, a
joint between a metal part and a ceramic part comprises two or more intervening layers of soft metal foil. The foil is preferably extremely thin, that is to say, less than 35 of an inch thick. Where the invention is applied to a sparkingplug, the foil must be of metal which will not melt at the working temperature of the plug. Pure aluminium is found to be a suitable material, although other infusible metals could be used.
According to another feature of the invention,
the insulator'of a sparking-plug comprises a metal collar or sleeve fitted to it in a gas-tight manner by the use of a joint as above described. The detachable joint between the insulator and the body of the plug may thus be formed between the metal sleeve or collar and the body.
A specific embodiment ofthe invention will now be described,by way of example, with reference to the accompanying drawing, in which:--
Figure 1 is a sectional elevation of an assem- 80 bled sparking-plug according to the invention,
and
Figure 2 is a diagram explaining the manner in which the gas-tight joint is made between the insulator and the surrounding sleeve.
36 As shown in Figure 1, the sparking-plug comprises a tubular insulator ll! of the ceramic material sold under the registered trade-mark Corundite." The central electrode is assembled in the insulator and forms a firing point II at 1 one end and an electrical contact I! at the other. The insulator is surrounded by a metal sleeve l3 which engages a recess in the body ll of the plug, the insulator being held in place by means of a gland nut l5 or extension tube which engages a metal washer l8 pressing down on to a suitable shoulder l'l formed on the insulator.
The plug is assembled in the following manner. The insulator l0, which is formed with a tapering portion l8, as shown in Figure 2, is closely wrapped with about five layers of aluminium foil of about of a thousandth of an inch in thickness. The foil l9 may be first cut to the required annular shape or, alternatively, the tapering portion' I! of the insulator may be first wrapped and 56 then the wrapped foil cut to the desired length.
A metal sleeve l3 having an internal taper corresponding to that of the portion I8 is then forced on to the foil-covered portion of the insulator under considerable pressure, such as a force of 200 lbs., or, in some circumstances, con- 5 sideraby more. The wall thickness of the sleeve is preferably so small that the sleeve expands resiliently during the forcing operation whereby the foil is tightly gripped between the sleeve and the ceramic insulator. In this manner 10 a perfectly gas-tight joint is obtained between the sleeve and the insulator. The joint between the sleeve and the surrounding body It is easily made gas-tight by accurately machining the co- 1 operating surfaces. The gas-tight joint between the insulator and the foil and between the foil and the sleeve is maintained by the pressure of the nut IS on the shoulder ll of the insulator.
Although the drawing shows an insulator having a tapering portion [8 to which the foil is applied, the invention is also applicable to an insulator having a parallel surface. A collar or sleeve may be drawn on to the foil-covered portion or may be swaged down to form the neces- 25 sary joint.
The invention also consists in providing a gastight joint between the electric contact I2 and the top end of the insulator In. This is achieved by threading a stack of washers 20 of thin aluminium foil, as hereinbefore described, on to the electric contact before this is screw-threaded into the insulator.
It is found that comparatively soft metal such as aluminium, when in the state of very thin foil, 35 penetrates the surface of hard ceramic materials and enables a gas-tight joint to be formed more efllciently than by any known process.
Although aluminium foil has been described, other infusible' metals could be used. The thick- 40 ness of ti of a thousandth of an inch is that which is preferred for the sparking-plug illustrated in the drawing. Somewhat thicker foil, up to $5 of an inch, may be used in some circumstances.
I claim:
1. A joint between a metal part and a ceramic part comprising two or more intervening layers of soft metal foil.
2. A joint between ametal part and a ceramic 50 part comprising two or more intervening layers, each less than 35 of an inch thick, of soft metal foil.
3. A sparking-plug comprising a joint between the insulator and a surrounding metal part which joint comprises two or more intervening layers of soft metal foil.
4. A sparking-plug comprising an insulator, a part surrounding the insulator, and two or more intervening layers, each less than 2 of an inch thick, of soft metal foil.
5. A sparking-plug comprising an insulator, a surrounding metal part, and a plurality of intervening layers of aluminium foil.
6. A sparking-plug comprising a ceramic insulator, a surrounding metal part, and a plurality of intervening layers of soft metal foil 01 about A of a thousandth of an inch in thickness.
7. A sparking-plug comprising a tapering ceramic insulator and a surrounding complementary metal part, wherein the insulator and the metal part are separated by five layers of aluminium foil of about of a thousandth of an inch thick.
I 10 CHARLES MOLYN'EUX CARINGTON.
US264778A 1938-05-12 1939-03-29 Joint for ceramic materials Expired - Lifetime US2174913A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB14235/38A GB514661A (en) 1938-05-12 1938-05-12 Improvements in joints for ceramic materials

Publications (1)

Publication Number Publication Date
US2174913A true US2174913A (en) 1939-10-03

Family

ID=10037474

Family Applications (1)

Application Number Title Priority Date Filing Date
US264778A Expired - Lifetime US2174913A (en) 1938-05-12 1939-03-29 Joint for ceramic materials

Country Status (4)

Country Link
US (1) US2174913A (en)
DE (1) DE759329C (en)
FR (1) FR852280A (en)
GB (1) GB514661A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2489410A (en) * 1946-11-25 1949-11-29 Lewis F Hahn Shielded spark plug
US2701839A (en) * 1949-02-05 1955-02-08 Sherbinin William N De Bottle or vase attached lamp support

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2489410A (en) * 1946-11-25 1949-11-29 Lewis F Hahn Shielded spark plug
US2701839A (en) * 1949-02-05 1955-02-08 Sherbinin William N De Bottle or vase attached lamp support

Also Published As

Publication number Publication date
DE759329C (en) 1951-08-02
GB514661A (en) 1939-11-14
FR852280A (en) 1940-01-27

Similar Documents

Publication Publication Date Title
US2339488A (en) Connector
US1294466A (en) Combined metal and glass structure and method of making same.
US2005897A (en) Electrode for a vapor electric device and method of constructing the same
US2305150A (en) Electrical terminal
US2174913A (en) Joint for ceramic materials
US2272210A (en) Method of sealing dissimilar materials
US2297785A (en) Terminal for electrical conductors
US2212556A (en) Method of manufacturing electric discharge tubes
US2349432A (en) Sparking plug
US2393355A (en) Method of forming solderless electrical conductor connections
US2549504A (en) Method of sealing glass to metal
US2355443A (en) Method of sealing spark plug electrodes in ceramic insulators
US1126975A (en) Art of manufacturing spark-plugs.
US2377481A (en) Method of gapping spark plugs
US2501826A (en) Spark plug
US2597978A (en) Spark plug
US3104277A (en) Fluid-tight lead-out device for an electric conductor
US2416643A (en) Spark plug
US1213881A (en) Sheathed wire and terminal therefor.
US2015482A (en) Method of effecting metal-refractory joint and joints resulting therefrom
US3009013A (en) Electrical insulator with compression ring seal
US2342788A (en) Wire connecting sleeve
US2103759A (en) Spark plug and method of making the same
US3049792A (en) Method of making insulated terminals of the receptacle type
US1793803A (en) Spark plug