US3883762A - Electrical discharge device comprising an insulator body having an electrically semi-conducting coating formed thereon - Google Patents

Electrical discharge device comprising an insulator body having an electrically semi-conducting coating formed thereon Download PDF

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Publication number
US3883762A
US3883762A US480199A US48019974A US3883762A US 3883762 A US3883762 A US 3883762A US 480199 A US480199 A US 480199A US 48019974 A US48019974 A US 48019974A US 3883762 A US3883762 A US 3883762A
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United States
Prior art keywords
oxide
weight
coating
conducting
electrically semi
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Expired - Lifetime
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US480199A
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English (en)
Inventor
Robert C Harris
Helmut P Meyer
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Honeywell International Inc
Unison Industries LLC
Original Assignee
Bendix Corp
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Publication date
Priority to US480199A priority Critical patent/US3883762A/en
Application filed by Bendix Corp filed Critical Bendix Corp
Priority to US05/530,922 priority patent/US3968303A/en
Priority to US05/530,921 priority patent/US3970591A/en
Priority to CA217,913A priority patent/CA1054785A/en
Priority to GB1988475A priority patent/GB1470482A/en
Publication of US3883762A publication Critical patent/US3883762A/en
Application granted granted Critical
Priority to FR7517704A priority patent/FR2274578A1/fr
Priority to JP50072617A priority patent/JPS5845148B2/ja
Priority to DE19752526836 priority patent/DE2526836A1/de
Priority to IT24376/75A priority patent/IT1044572B/it
Assigned to UNISON INDUSTRIES LIMITED PARTNERSHIP, A DE LIMITED PARTNERSHIP reassignment UNISON INDUSTRIES LIMITED PARTNERSHIP, A DE LIMITED PARTNERSHIP ASSIGNMENT OF ASSIGNORS INTEREST. Assignors: ALLIED-SIGNAL INC.
Assigned to ALLIED-SIGNAL INC., A DE CORP. reassignment ALLIED-SIGNAL INC., A DE CORP. MERGER (SEE DOCUMENT FOR DETAILS). Assignors: ALLIED CORPORATION, A DE CORP.
Assigned to ALLIED CORPORATION, A CORP. OF NY reassignment ALLIED CORPORATION, A CORP. OF NY MERGER (SEE DOCUMENT FOR DETAILS). EFFECTIVE DATE: 4-01-85, DELAWARE Assignors: BENDIX CORPORATION, THE, A DE CORP.
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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
    • H01T13/52—Sparking plugs characterised by a discharge along a surface
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
    • H05K1/00—Printed circuits
    • H05K1/02—Details
    • H05K1/09—Use of materials for the conductive, e.g. metallic pattern
    • H05K1/092—Dispersed materials, e.g. conductive pastes or inks

Definitions

  • shunted ceramic tips are of two varieties, a surface treated insulator and the homogenous type wherein the entire insulator is a semi-conductor.
  • An example of the former is described in US. Pat. No. 2,953,704, wherein an aluminum oxide ceramic insulator is coated with a sintered mixture of cuprous oxide and ferric oxide.
  • An example of the latter is described in US. Pat. No. 3,558,959, wherein a semi-conducting ceramic body is formed of bonded particles of silicon carbide.
  • insulators comprised essentially of beryllium oxide have been found to be superior to more commonly used aluminum oxide insulators, both with respect to improved thermal conductivity and resistance to thermal shock.
  • semi-conducting coatings developed for aluminum oxide based ceramics have proved unsatisfactory when applied to beryllium oxide ceramics.
  • FIG. I is a partially schematic view, in longitudinal cross section, of the lower tip portion of an igniter plug embodying the invention.
  • FIG. 2 is a view similar to FIG. 1, showing a differently configured lower tip portion of an igniter plug embodying the invention.
  • a low-voltage igniter plug 10 comprises a hollow, cylindrical body shell 11 which is generally made of a nickel-steel alloy.
  • the lower extremity of shell 11 is formed as a radially inwardly directed flange 12.
  • the inner edge surface 13 of flange 12 is cylindrical and coaxial with the shell 11, which surface 13 of flange l2 constitutes a ground electrode.
  • a central electrode 14 extends longitudinally within the shell 11 and is coaxial therewith, the firing tip 15 of the electrode 14 terminating in spaced relationship with the surface 13 thus forming an annular spark gap 16.
  • the flanged portion 12 When the plug 10 is installed in an engine, the flanged portion 12 is in direct communication with the combustion chamber of the engine and is grounded to the engine by contact between the shell 11 and the en gine block.
  • the upper end of central electrode l4 is seated in an annular insulating member 17 disposed within the shell 11 which insulates the central electrode 14 from the shell II.
  • the insulating member 17 may be formed of any suitable insulating material such as porcelain, borosilicate glass, aluminum oxide ceramic, beryllium oxide ceramic or the like.
  • Another insulating member 18, formed principally of beryllium oxide, is annularly disposed about the lower end of the central electrode 14, and extends from the lower end of insulating member 17 to the upper radially inwardly directed surface of the flange 12.
  • the lower periphery and the lower face of the insulating member 18 is coated with a semi-conducting layer 19, said layer 19 being in intimate contact with the lower end of the central electrode 14 and the upper surface of the radially inwardly directed flange 12, whereby current flow can occur across the semi-conducting coating 19 upon the application of low voltage, the current flow resulting in ionization of the spark gap 16, thus enabling a high energy, low voltage spark to discharge across the gap 16 and between the firing tip 15 of the central electrode 14 and the surface 13 of flange l2.
  • a low voltage igniter plug 20 comprises a hollow, cylindrical body shell 21.
  • the lower extremity of body shell 21 is formed as a radially inwardly directed flange 22, the inner edge surface 23 of which is cylindrical and coaxial with the shell 21 which surface 23 of flange 22 constitutes a ground electrode.
  • a central electrode 24 extends longitudinally within the shell 21 and coaxial therewith, the lower end of electrode 24 terminating in an annular, outwardly directed flange 25, said flange 25 having a lesser diameter than the diameter of radially inwardly directed flange 22 of shell 21, said flanges defining between them an annular spark gap 26.
  • central electrode 24 is seated in an annular insulating member 27 disposed within body shell 21, which insulates the central electrode 24 from the shell 21.
  • the insulating member 27 may be formed of any suitable insulating material, such as porcelain, borosilicate glass, aluminum oxide ceramic, beryllium oxide ceramic or the like.
  • Another insulating member 28 formed principally of beryllium oxide is annularly disposed about the lower end of the central electrode 24 and extends from the lower end of insulating member 27 to both the upper surface of flange 22 and the upper surface of flange 25, forming a bridge across the spark gap 26 formed between flange 25 and surface 23 of flange 22.
  • the lower face of the insulating member 28 is coated with a semi-conducting layer 29, said layer 29 being in intimate contact with the upper surfaces of flanges 22 and 25, whereby current flow can occur along the semiconducting coating 29 upon the application of low voltage, the current flow resulting in ionization of the spark gap 26, thus enabling a high energy, low voltage spark to discharge across the gap 26 and between flange 25 of central electrode 24 and surface 23 of flange 22.
  • the electrically semiconducting layer (designated at 19 in FIG. 1 and at 29 in FIG. 2) which shunts the electrodes of the spark gap is in the form of a film-like coating formed on the beryllium oxide ceramic insulator member.
  • the semiconducting layer is comprised of a fired mixture of lanthanum oxide (La O and copper oxide, preferably cuprous oxide (Cu O).
  • the said mixture may also contain iron oxide, preferably ferric oxide (Fe-
  • the firing of the mixture of oxides is carried out at such temperature and for such length of time that at least one of the oxides is sintered, i.e. heated to the point of incipient fusion.
  • the liquid vehicle in which the oxides are preferably applied to the beryllium oxide substrate is driven-off or volatilized and the resulting electrically semiconducting layer is compacted into a low resistance, smooth-surfaced coating layer which is firmly bonded to the surface of the beryllium oxide substrate.
  • an electrically semi-conducting layer shunting the electrodes of such plugs must have a relatively smooth and unblemished outer surface confronting the gap; a relatively low resistivity both initially and during the life of the plug under the varying temperatures and other service conditions encountered during use; and must be well-bonded to the ceramic refractory substrate.
  • the semi-conducting layer is smooth and substantially free from imperfections, it will not function uniformly over the area of the spark gap.
  • such layer is of relatively low resistivity, i.e. from about 10,000 to about 500,000 ohms, preferably from about 10,000 to about 100,000 ohms. it will not sufficiently strongly ionize the gap between the electrodes prior to spark discharge.
  • the layer is well-bonded to the ceramic substrate, it will flake or spall-off the substrate under prolonged, arduous service conditions.
  • an electrically semiconducting coating material possessed of the abovementioned desirable properties and suitable for coating predominantly beryllium oxide (i.e. from about to 99% by weight BeO) based ceramic insulator bodies comprises a sintered mixture of from 25% to by weight lanthanum oxide (La O from 5% to 75% by weight cuprous oxide (Cu O) and from 0% to 25% by weight ferric oxide (F6203).
  • a preferred semiconducting coating comprises a sintered mixture of from 65% to 90% by weight lanthanum oxide (La- 0 from 10% to 30% by weight cuprous oxide (Cu O) and from 0% to 5% by weight ferric oxide (Fe O).
  • the above ranges of weight percentages of the said oxides were determined by preparing about two hundred fifty mixtures of lanthanum, cuprous and ferric oxides of broadly varying compositions ranging from 0% to 100% by weight lanthanum oxide, from 0% to 100% by weight cuprous oxide and from 0% to 100% by weight ferric oxide and coating each composition on individual beryllium oxide discs as will be more fully described hereinafter.
  • the coated discs were fired at temperatures ranging from 2150F to 2450F and the resistance of the fired coatings was measured.
  • the resistance values were plotted on ternary diagrams and correlated with the respective metal oxide composition which yielded the respective resistance value.
  • Metal oxide compositions in the above ranges were, from analyses of the ternary diagrams, found to produce coatings having acceptable low resistance properties and, a fortiori, would be suitable in the preparation of electrically semi-conducting coatings particularly compatible with beryllium oxide ceramic substrates.
  • the coating is preferably prepared, generally speaking, by grinding the dry oxides to a fine powder and slurrying the same with a liquid media comprising water, a wetting agent and a glycol.
  • the oxide slurry is painted on the beryllium oxide substrate by brushing or spraying to a thickness of between about 0.005 to 0.010 inches (5 to 10 mils).
  • the coated substrate is then fired in a kiln or the like at a temperature of from about 2150F to 2450F until a smooth coated surface is observed, the liquid carrier, of course, being volatilized.
  • the beryllium oxide is somewhat porous, the coating will to some extent penetrate the pores, thus enhancing the adherence of the coating to the substrate.
  • composition of preferred embodiments of electrically semi-conducting coatings on beryllium oxide ceramic substrates in accordance with the invention and a preferred manner of forming electrically semiconducting coatings on beryllium oxide ceramic substrates are set forth in the following example, which example is intended solely for the purpose of illustration and is not to be construed as in anyways limiting the scope of the invention.
  • EXAMPLE 1 A series of one-gram samples of lanthanum oxide (La O Kerr-McGee, Code 528), cuprous oxide (Cu O, Fisher C-477, Lot 723251) and ferric oxide (Fe- 0 Columbia 347 Grade) having the weight percentages indicated in Table l are prepared, each constituent of each sample being weighed, on a Mettler H15 analytical balance, to the nearest milligram.
  • the dry oxides constituting each sample are ground together in a mortar and pestle and are placed in individual plastic vials. To each vial is added the following.
  • Glycerol 3 drops Tcrgitol No. 4 (trade name for a wetting agent manufactured by Union Carbide Corp.) 1 drops Distilled Water 12 drops Note: The drops" in which the volumes of glycerol. 'l'ergilnl No. 4 and JlLf are given are drops from a standard anal ticul hurctte
  • the dry oxides are thoroughly mixed with the liquid additives to form a uniform slurry or suspension of the oxides in the liquid carrier.
  • Each slurried sample is painted on a separate disc of beryllium oxide, each disc measuring approximately 0.5 inches in diameter by 0.070 inches thick and having a BeO content of about 99% by weight. To assure uniform application of each sample on each disc the following procedure is used.
  • Pressure sensitive masks or stencils are made by punching 0.25 inch diameter holes in masking tape, cutting off a section containing one hole and pressing the tape section onto a disc. positioning the hole in the center of the disc. Each sample is then painted, to a thickness of about 5 mils, over the hole in the tape section and when the mask is peeled away a 0.25 inch diameter sample is centered and coated on each disc.
  • the discs are then fired in an electrically heated resistance element-type kiln (Burrel, Model 90) to the temperatures indicated in Table l.
  • the samples are heated at about 200F per hour to a temperature of about 800F to evaporate the liquid carrier after which heating is continued at a rate of about 400F per hour until the desired temperature is attained, Orton pyrometric cones being used to indicate the heat output and uniformity of firing.
  • the discs are cooled and observed for smoothness and uniformity of coating.
  • the resistance of the sintered coating is measured 22C with at Simpson 260 Ohmeter, the resistance for each sample at the respective firing temperature is tabulated in Table l, in Ohms X l0*.
  • the semiconducting metal oxide coating compositions according to the invention each have satisfactory resistances when coated on a beryllium oxide insulator material. It will be observed that. generally speaking, the resistance of the coating increases with increasing firing temperature, and significantly increases at a firing temperature of 2450F, as
  • Samples No. and 31 are illustrative of the unsuitability of mixtures of lanthanum oxide and ferric oxide as coatings prepared from mixtures of these oxides are also electrically non-conducting.
  • Samples No. 23, 24 and 29 are indicative of the unsuitability of coatings respectively consisting entirely of lanthanum oxide.
  • cuprous oxide or ferric oxide satisfactory coatings bcing produced only when a mixture of lanthanum and cuprous oxides is employed or a mixture of these oxides plus ferric oxide, the presence of the latter believed to promote lower resistivity at higher lanthanum oxide ratios and appears to improve somewhat the adherence of the coating to the beryllium oxide substrate.
  • the coating composition itself, it is to be understood that the use of ferric oxide as a constitutent of the mixture is optional and is not critical to the formation of a satisfactory semi-conducting coating, the essential constitutents of the coating being lanthanum oxide and cuprous oxide.
  • the metal oxide coating of the invention is particularly intended for application to beryllium oxide ceramic substrates, it may also be applied to insulating bodies composed of, for example, aluminum oxides.
  • a shunt-type igniter plug comprising an outer metal shell, a ground electrode integral with said shell, a central electrode having a firing tip, said central electrode mounted in an insulator disposed within said shell, the firing tip of said central electrode being in opposed spaced relation to the ground electrode forming a spark gap therebetween, and improved electrically semi-conducting means adjacent said spark gap and in electrical contact with the opposed electrodes, said improved electrically semi-conducting means comprising a beryllium oxide ceramic body disposed about said central electrode, said ceramic body having formed thereon and bonded thereto an electrically semiconducting coating, said coating comprising a sintered mixture of lanthanum oxide and cuprous oxide, said coating being in electrical contact with said opposed electrodes and forming a bridge across said spark gap.
  • said electrically semi-conducting coating comprises a sintered mixture of lanthanum oxide, cuprous oxide and ferric oxide.
  • said electrically semi-conducting coating comprises a sintered mixture of from 25% to 90% by weight of lanthanum oxide, from 5% to by weight of cuprous oxide and from 0% to 25% by weight offerric oxide.
  • said electrically semi-conducting coating comprises a sintered mixture of from 65% to by weight of lanthanum oxide, from 10% to 30% by weight of cuprous oxide and from 0% to 5% by weight of ferric oxide.

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US480199A 1974-06-17 1974-06-17 Electrical discharge device comprising an insulator body having an electrically semi-conducting coating formed thereon Expired - Lifetime US3883762A (en)

Priority Applications (9)

Application Number Priority Date Filing Date Title
US480199A US3883762A (en) 1974-06-17 1974-06-17 Electrical discharge device comprising an insulator body having an electrically semi-conducting coating formed thereon
US05/530,922 US3968303A (en) 1974-06-17 1974-12-09 Electrical discharge device comprising an insulator body having an electrically semi-conducting coating formed thereon
US05/530,921 US3970591A (en) 1974-06-17 1974-12-09 Electrical discharge device comprising an insulator body having an electrically semi-conducting coating formed thereon
CA217,913A CA1054785A (en) 1974-06-17 1975-01-14 Electrical discharge device comprising an insulator body having an electrically semi-conducting coating formed thereon
GB1988475A GB1470482A (en) 1974-06-17 1975-05-12 Ceramic insulator having an electrically semi-conducting coating formed thereon
FR7517704A FR2274578A1 (fr) 1974-06-17 1975-06-06 Revetement electriquement semi-conducteur pour oxyde de beryllium
JP50072617A JPS5845148B2 (ja) 1974-06-17 1975-06-14 放電装置
IT24376/75A IT1044572B (it) 1974-06-17 1975-06-16 Dispositivo di scarica elettrica includente un isolatore rivestito di una composizione elettricamente conduttrice
DE19752526836 DE2526836A1 (de) 1974-06-17 1975-06-16 Elektrisch halbleitende belagsverbindung und ein funkenentladungsgeraet

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Application Number Priority Date Filing Date Title
US480199A US3883762A (en) 1974-06-17 1974-06-17 Electrical discharge device comprising an insulator body having an electrically semi-conducting coating formed thereon

Related Child Applications (2)

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US05/530,922 Division US3968303A (en) 1974-06-17 1974-12-09 Electrical discharge device comprising an insulator body having an electrically semi-conducting coating formed thereon
US05/530,921 Division US3970591A (en) 1974-06-17 1974-12-09 Electrical discharge device comprising an insulator body having an electrically semi-conducting coating formed thereon

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US3883762A true US3883762A (en) 1975-05-13

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US (1) US3883762A (enrdf_load_stackoverflow)
JP (1) JPS5845148B2 (enrdf_load_stackoverflow)
CA (1) CA1054785A (enrdf_load_stackoverflow)
DE (1) DE2526836A1 (enrdf_load_stackoverflow)
FR (1) FR2274578A1 (enrdf_load_stackoverflow)
GB (1) GB1470482A (enrdf_load_stackoverflow)
IT (1) IT1044572B (enrdf_load_stackoverflow)

Cited By (19)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4439707A (en) * 1980-07-23 1984-03-27 Nippon Soken, Inc. Spark plug with a wide discharge gap
US4713574A (en) * 1985-10-07 1987-12-15 The United States Of America As Represented By The Secretary Of The Air Force Igniter electrode life control
US4748947A (en) * 1987-06-22 1988-06-07 Ford Motor Company Ignition system and method for multi-fuel combustion engines
US4951173A (en) * 1987-12-18 1990-08-21 Ngk Spark Plug Co., Ltd. Creeping discharge type igniter plug
EP0407975A3 (en) * 1989-07-14 1992-05-27 Yazaki Corporation Gas-filled discharge tube and high tension cable device
US5187404A (en) * 1991-08-05 1993-02-16 Cooper Industries, Inc. Surface gap igniter
US6133146A (en) * 1996-05-09 2000-10-17 Scb Technologies, Inc. Semiconductor bridge device and method of making the same
US6265814B1 (en) * 1997-09-24 2001-07-24 Nippon Soken, Inc. Spark plug having a bypass electrode extending along a bypass path between center and ground electrode
US6583538B1 (en) * 1999-10-21 2003-06-24 Beru Ag Spark plug
US20090033194A1 (en) * 2005-01-26 2009-02-05 Renault S.A.S. Plasma-generating plug
US20100165539A1 (en) * 2008-12-26 2010-07-01 Ngk Spark Plug Co., Ltd. Ignition plug and ignition system
CN102884686A (zh) * 2010-04-16 2013-01-16 雷诺股份公司 配备有用于防止短路的装置的火花塞
CN103190045A (zh) * 2010-12-29 2013-07-03 费德罗-莫格尔点火公司 改进间隙控制的电晕点火器
CN103210556A (zh) * 2010-12-14 2013-07-17 费德罗-莫格尔点火公司 改进电晕控制的电晕点火器
US20150188292A1 (en) * 2013-12-26 2015-07-02 John Zink Company, Llc High energy ignition spark igniter
US9787064B2 (en) 2013-05-03 2017-10-10 Federal-Mogul Ignition Company Corona ignition with hermetic combustion seal
CN109538357A (zh) * 2018-11-19 2019-03-29 陕西航空电气有限责任公司 一种小型半导体电嘴结构及加工方法
US20190170066A1 (en) * 2017-12-05 2019-06-06 General Electric Company High temperature articles for turbine engines
US20190214796A1 (en) * 2018-01-04 2019-07-11 Tenneco Inc. Shaped collet for electrical stress grading in corona ignition systems

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4419601A (en) 1979-11-05 1983-12-06 Nissan Motor Company, Limited Spark plug for internal combustion engine
US4378385A (en) 1980-03-28 1983-03-29 United Kingdom Atomic Energy Authority Method of making oxygen ion conducting solid electrolyte device
JPH01225085A (ja) * 1988-03-03 1989-09-07 Ngk Spark Plug Co Ltd 沿面放電型スパークプラグ
JP7051381B2 (ja) * 2017-11-16 2022-04-11 日本特殊陶業株式会社 スパークプラグ

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2684665A (en) * 1949-06-09 1954-07-27 Bendix Aviat Corp Electrical apparatus

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5132181B2 (enrdf_load_stackoverflow) * 1971-10-14 1976-09-10

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2684665A (en) * 1949-06-09 1954-07-27 Bendix Aviat Corp Electrical apparatus

Cited By (27)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4439707A (en) * 1980-07-23 1984-03-27 Nippon Soken, Inc. Spark plug with a wide discharge gap
US4713574A (en) * 1985-10-07 1987-12-15 The United States Of America As Represented By The Secretary Of The Air Force Igniter electrode life control
US4748947A (en) * 1987-06-22 1988-06-07 Ford Motor Company Ignition system and method for multi-fuel combustion engines
US4951173A (en) * 1987-12-18 1990-08-21 Ngk Spark Plug Co., Ltd. Creeping discharge type igniter plug
EP0407975A3 (en) * 1989-07-14 1992-05-27 Yazaki Corporation Gas-filled discharge tube and high tension cable device
US5166574A (en) * 1989-07-14 1992-11-24 Yazaki Corporation High-tension cable device
US5187404A (en) * 1991-08-05 1993-02-16 Cooper Industries, Inc. Surface gap igniter
US6133146A (en) * 1996-05-09 2000-10-17 Scb Technologies, Inc. Semiconductor bridge device and method of making the same
US6265814B1 (en) * 1997-09-24 2001-07-24 Nippon Soken, Inc. Spark plug having a bypass electrode extending along a bypass path between center and ground electrode
US6583538B1 (en) * 1999-10-21 2003-06-24 Beru Ag Spark plug
US7843117B2 (en) * 2005-01-26 2010-11-30 Renault S.A.S. Plasma-generating plug
US20090033194A1 (en) * 2005-01-26 2009-02-05 Renault S.A.S. Plasma-generating plug
US20100165539A1 (en) * 2008-12-26 2010-07-01 Ngk Spark Plug Co., Ltd. Ignition plug and ignition system
US8243415B2 (en) * 2008-12-26 2012-08-14 Ngk Spark Plug Co., Ltd. Ignition plug and ignition system
CN102884686A (zh) * 2010-04-16 2013-01-16 雷诺股份公司 配备有用于防止短路的装置的火花塞
CN103210556A (zh) * 2010-12-14 2013-07-17 费德罗-莫格尔点火公司 改进电晕控制的电晕点火器
CN103210556B (zh) * 2010-12-14 2015-04-01 费德罗-莫格尔点火公司 改进电晕控制的电晕点火器
CN103190045A (zh) * 2010-12-29 2013-07-03 费德罗-莫格尔点火公司 改进间隙控制的电晕点火器
US9787064B2 (en) 2013-05-03 2017-10-10 Federal-Mogul Ignition Company Corona ignition with hermetic combustion seal
US9484717B2 (en) * 2013-12-26 2016-11-01 Chentronics, Llc High energy ignition spark igniter
US20150188292A1 (en) * 2013-12-26 2015-07-02 John Zink Company, Llc High energy ignition spark igniter
US20190170066A1 (en) * 2017-12-05 2019-06-06 General Electric Company High temperature articles for turbine engines
US10815896B2 (en) * 2017-12-05 2020-10-27 General Electric Company Igniter with protective alumina coating for turbine engines
US20190214796A1 (en) * 2018-01-04 2019-07-11 Tenneco Inc. Shaped collet for electrical stress grading in corona ignition systems
US10879677B2 (en) * 2018-01-04 2020-12-29 Tenneco Inc. Shaped collet for electrical stress grading in corona ignition systems
CN109538357A (zh) * 2018-11-19 2019-03-29 陕西航空电气有限责任公司 一种小型半导体电嘴结构及加工方法
CN109538357B (zh) * 2018-11-19 2021-01-01 陕西航空电气有限责任公司 一种小型半导体电嘴结构及加工方法

Also Published As

Publication number Publication date
IT1044572B (it) 1980-03-31
FR2274578A1 (fr) 1976-01-09
FR2274578B1 (enrdf_load_stackoverflow) 1977-07-08
JPS5845148B2 (ja) 1983-10-07
JPS5113032A (enrdf_load_stackoverflow) 1976-02-02
DE2526836A1 (de) 1976-01-02
GB1470482A (en) 1977-04-14
CA1054785A (en) 1979-05-22

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