GB1497641A - Spark plug for an internal combustion engine - Google Patents

Spark plug for an internal combustion engine

Info

Publication number
GB1497641A
GB1497641A GB1871776A GB1871776A GB1497641A GB 1497641 A GB1497641 A GB 1497641A GB 1871776 A GB1871776 A GB 1871776A GB 1871776 A GB1871776 A GB 1871776A GB 1497641 A GB1497641 A GB 1497641A
Authority
GB
United Kingdom
Prior art keywords
degrees
nickel
electrode
combustion engine
internal combustion
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
Application number
GB1871776A
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.)
Robert Bosch GmbH
Original Assignee
Robert Bosch GmbH
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 Robert Bosch GmbH filed Critical Robert Bosch GmbH
Publication of GB1497641A publication Critical patent/GB1497641A/en
Expired legal-status Critical Current

Links

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
    • H01T13/39—Selection of materials for electrodes

Landscapes

  • Spark Plugs (AREA)

Abstract

1497641 Spark-plugs ROBERT BOSCH GmbH 7 May 1976 [9 May 1975] 18717/76 Heading F1B A spark-plug for an I.C. engine includes a central electrode 15 and an earth electrode 12, the ignition portion 20 of the central electrode extending out of the insulator 19 and being of frusto-conical form tapering to an end surface 21 parallel to the earth electrode and having a platinum coating 22 of a thickness in the range from 10 to 100 Ám, preferably 40 to 50 Ám. The vertex angle of frusto-conical portion 20 is in the range 20 to 70 degrees, preferably 45 degrees. The end portion of earth electrode 12 may be tapered with an angle of 20 to 70 degrees, preferably 30 degrees. The central electrode may be of nickel, a nickel alloy, or have a nickel sheath on a core of copper or composite fibrous material, e.g. nickel-containing fibres in a matrix.
GB1871776A 1975-05-09 1976-05-07 Spark plug for an internal combustion engine Expired GB1497641A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19752520622 DE2520622A1 (en) 1975-05-09 1975-05-09 SPARK PLUG FOR COMBUSTION MACHINERY

Publications (1)

Publication Number Publication Date
GB1497641A true GB1497641A (en) 1978-01-12

Family

ID=5946127

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1871776A Expired GB1497641A (en) 1975-05-09 1976-05-07 Spark plug for an internal combustion engine

Country Status (8)

Country Link
JP (1) JPS51140034A (en)
BE (1) BE841619A (en)
BR (1) BR7602866A (en)
DE (1) DE2520622A1 (en)
ES (1) ES447673A1 (en)
FR (1) FR2310643A1 (en)
GB (1) GB1497641A (en)
IT (1) IT1078812B (en)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3132814A1 (en) * 1980-08-21 1982-04-15 Nippondenso Co., Ltd., Kariya, Aichi Spark plug for internal combustion engines
GB2219626B (en) * 1988-06-10 1992-11-18 Magneti Marelli Spa Partial surface discharge spark plug for an internal combustion engine and method for manufacturing the earth electrodes of such a spark plug
USRE34778E (en) * 1981-04-30 1994-11-08 Nippondenso Co., Ltd. Spark plug and method of manufacturing the same
US7109646B2 (en) 2002-12-10 2006-09-19 Denso Corporation Spark plug having center electrode with columnar portion and conical portion
EP1693157A3 (en) * 2005-02-18 2010-02-24 Hitachi Koki Co., Ltd. Combustion-type power tool having ignition proof arrangement
US8841826B2 (en) 2010-02-18 2014-09-23 Ngk Spark Plug Co., Ltd. Spark plug

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5717590A (en) * 1980-07-08 1982-01-29 Toyoda Chuo Kenkyusho Kk Ignition plug
JPS592152B2 (en) * 1981-05-07 1984-01-17 株式会社デンソー Method for manufacturing spark plugs for internal combustion engines
JPS6072182A (en) * 1983-09-28 1985-04-24 株式会社デンソー Ignition plug for internal combustion engine
US4725254A (en) * 1986-11-24 1988-02-16 Allied Corporation Method for manufacturing a center electrode for a spark plug
BE1009076A5 (en) * 1993-03-02 1996-11-05 Bogaert Bernard Van Den Mass improved electrode candle.
DE10129040A1 (en) * 2001-06-15 2003-01-02 Bosch Gmbh Robert spark plug

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3132814A1 (en) * 1980-08-21 1982-04-15 Nippondenso Co., Ltd., Kariya, Aichi Spark plug for internal combustion engines
USRE34778E (en) * 1981-04-30 1994-11-08 Nippondenso Co., Ltd. Spark plug and method of manufacturing the same
USRE35429E (en) * 1981-04-30 1997-01-21 Nippendenso Co., Ltd. Spark plug and the method of manufacturing the same
GB2219626B (en) * 1988-06-10 1992-11-18 Magneti Marelli Spa Partial surface discharge spark plug for an internal combustion engine and method for manufacturing the earth electrodes of such a spark plug
US7109646B2 (en) 2002-12-10 2006-09-19 Denso Corporation Spark plug having center electrode with columnar portion and conical portion
EP1693157A3 (en) * 2005-02-18 2010-02-24 Hitachi Koki Co., Ltd. Combustion-type power tool having ignition proof arrangement
US8841826B2 (en) 2010-02-18 2014-09-23 Ngk Spark Plug Co., Ltd. Spark plug

Also Published As

Publication number Publication date
BR7602866A (en) 1977-11-16
FR2310643A1 (en) 1976-12-03
IT1078812B (en) 1985-05-08
BE841619A (en) 1976-09-01
ES447673A1 (en) 1977-06-16
FR2310643B3 (en) 1979-01-19
DE2520622A1 (en) 1976-11-18
JPS51140034A (en) 1976-12-02

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Legal Events

Date Code Title Description
PS Patent sealed
PCNP Patent ceased through non-payment of renewal fee