GB719628A - Improvements in or relating to sparking plug assemblies - Google Patents

Improvements in or relating to sparking plug assemblies

Info

Publication number
GB719628A
GB719628A GB2347651A GB2347651A GB719628A GB 719628 A GB719628 A GB 719628A GB 2347651 A GB2347651 A GB 2347651A GB 2347651 A GB2347651 A GB 2347651A GB 719628 A GB719628 A GB 719628A
Authority
GB
United Kingdom
Prior art keywords
oxides
block
sintered
pressed
per cent
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
GB2347651A
Inventor
John Martin Herbert
John Walter Dickens
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.)
Plessey Co Ltd
Original Assignee
Plessey Co 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 Plessey Co Ltd filed Critical Plessey Co Ltd
Priority to GB2347651A priority Critical patent/GB719628A/en
Publication of GB719628A publication Critical patent/GB719628A/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
    • H01T13/52—Sparking plugs characterised by a discharge along a surface

Landscapes

  • Spark Plugs (AREA)
  • Compositions Of Oxide Ceramics (AREA)

Abstract

A sparking plug assembly comprises a block of ceramic composition consisting substantially wholly of a fired and compacted mixture of zinc oxide with not more than 20 per cent. of one or more oxides of the metals of Groups Ib, IVb, Vb, VIIa or VIII of the Periodic Table, the block having electrodes secured thereto with a gap on the block between the electrodes. Oxides specified are manganese, iron, cobalt, nickel, copper, tin, antimony, lead and bismuth. The oxides are mixed together with an organic dispersant, e.g. an aqueous solution of gum arabic, dried, screened, pressed to shape and sintered, or preferably-to reduce shrinkage on sintering -are, after being shaped prefired at 50 DEG -150 DEG C. below sintering temperature, ground, mixed with an organic binder, e.g. butyl methacrylate, pressed to shape and sintered. Specification 700,756 is referred to. The Provisional Specification refers to the addition of up to 70 per cent. of the oxide other than that of zinc.
GB2347651A 1951-10-09 1951-10-09 Improvements in or relating to sparking plug assemblies Expired GB719628A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB2347651A GB719628A (en) 1951-10-09 1951-10-09 Improvements in or relating to sparking plug assemblies

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB2347651A GB719628A (en) 1951-10-09 1951-10-09 Improvements in or relating to sparking plug assemblies

Publications (1)

Publication Number Publication Date
GB719628A true GB719628A (en) 1954-12-08

Family

ID=10196231

Family Applications (1)

Application Number Title Priority Date Filing Date
GB2347651A Expired GB719628A (en) 1951-10-09 1951-10-09 Improvements in or relating to sparking plug assemblies

Country Status (1)

Country Link
GB (1) GB719628A (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2926275A (en) * 1960-02-23 Pgras
DE1139064B (en) * 1955-08-01 1962-10-31 Renault Insulating compound for spark plugs for internal combustion engines that work with low voltage through capacitance discharge
DE1206210B (en) * 1957-04-29 1965-12-02 Renault Low voltage sliding spark plug for internal combustion engines
WO1987007778A1 (en) * 1986-06-12 1987-12-17 Robert Bosch Gmbh Spark plug with surface discharge section

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2926275A (en) * 1960-02-23 Pgras
DE1139064B (en) * 1955-08-01 1962-10-31 Renault Insulating compound for spark plugs for internal combustion engines that work with low voltage through capacitance discharge
DE1206210B (en) * 1957-04-29 1965-12-02 Renault Low voltage sliding spark plug for internal combustion engines
WO1987007778A1 (en) * 1986-06-12 1987-12-17 Robert Bosch Gmbh Spark plug with surface discharge section

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