GB198345A - Improvements in sparking plugs - Google Patents

Improvements in sparking plugs

Info

Publication number
GB198345A
GB198345A GB9618/23A GB961823A GB198345A GB 198345 A GB198345 A GB 198345A GB 9618/23 A GB9618/23 A GB 9618/23A GB 961823 A GB961823 A GB 961823A GB 198345 A GB198345 A GB 198345A
Authority
GB
United Kingdom
Prior art keywords
insulator
electrode
sparking
ceramic material
metallic
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
GB9618/23A
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 AG
Robert Bosch GmbH
Original Assignee
Robert Bosch AG
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 AG, Robert Bosch GmbH filed Critical Robert Bosch AG
Publication of GB198345A publication Critical patent/GB198345A/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
    • H01T21/00—Apparatus or processes specially adapted for the manufacture or maintenance of spark gaps or sparking plugs
    • H01T21/02—Apparatus or processes specially adapted for the manufacture or maintenance of spark gaps or sparking plugs of sparking plugs

Landscapes

  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Spark Plugs (AREA)

Abstract

198,345. Bosch Akt.-Ges., R. May 23, 1922, [Convention date]. Sparking - plugs. - In a sparking plug having an insulator b of ceramic material, the central electrode c is formed throughsulator b of ceramic substance, for instance " silit," which consists of carbon, silicon, and nitrogen. The conductivity may be improved by adding powdered carbon, graphite, metallic componnds, or other conducting substances. The electrode preferably has the same co-efficient of expansion as the insulator, in order to prevent leakages. In one form, the electrode and the insulator are both fixed before being assembled. In modifications one or both are unfired or only lightly fired before assembling, and both are then fired together; an intermediate adhesive layer of fireproof material may be employed. In a further form, a short central electrode of vitreous or ceramic material, in the lower end of the insulator, is connected to a metallic terminal post.
GB9618/23A 1922-05-23 1923-04-09 Improvements in sparking plugs Expired GB198345A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE198345X 1922-05-23

Publications (1)

Publication Number Publication Date
GB198345A true GB198345A (en) 1924-03-20

Family

ID=5756933

Family Applications (1)

Application Number Title Priority Date Filing Date
GB9618/23A Expired GB198345A (en) 1922-05-23 1923-04-09 Improvements in sparking plugs

Country Status (1)

Country Link
GB (1) GB198345A (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS58186137A (en) * 1982-04-06 1983-10-31 ロ−ベルト・ボツシユ・ゲゼルシヤフト・ミツト・ベシユレンクテル・ハフツング Method of mounting central electrode in insulator of ignition plug without gap for internal combustion engine
US4539503A (en) * 1981-11-07 1985-09-03 Robert Bosch Gmbh Rapid-heating, high-temperature-stable spark plug for internal combustion engines
GB2291124A (en) * 1994-06-30 1996-01-17 Bosch Gmbh Robert I.c.engine spark plug
US5821676A (en) * 1994-09-12 1998-10-13 General Motors Corporation Spark plug with grooved, tapered center electrode

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4539503A (en) * 1981-11-07 1985-09-03 Robert Bosch Gmbh Rapid-heating, high-temperature-stable spark plug for internal combustion engines
JPS58186137A (en) * 1982-04-06 1983-10-31 ロ−ベルト・ボツシユ・ゲゼルシヤフト・ミツト・ベシユレンクテル・ハフツング Method of mounting central electrode in insulator of ignition plug without gap for internal combustion engine
GB2291124A (en) * 1994-06-30 1996-01-17 Bosch Gmbh Robert I.c.engine spark plug
GB2291124B (en) * 1994-06-30 1998-02-18 Bosch Gmbh Robert Spark plug for internal combustion engines
US5821676A (en) * 1994-09-12 1998-10-13 General Motors Corporation Spark plug with grooved, tapered center electrode

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