FR2412186A1 - Spark plug electrode mfr. - by melting metal core to metal sheath - Google Patents

Spark plug electrode mfr. - by melting metal core to metal sheath

Info

Publication number
FR2412186A1
FR2412186A1 FR7738285A FR7738285A FR2412186A1 FR 2412186 A1 FR2412186 A1 FR 2412186A1 FR 7738285 A FR7738285 A FR 7738285A FR 7738285 A FR7738285 A FR 7738285A FR 2412186 A1 FR2412186 A1 FR 2412186A1
Authority
FR
France
Prior art keywords
sheath
core
metal
spark plug
plug electrode
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.)
Withdrawn
Application number
FR7738285A
Other languages
French (fr)
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.)
UK Atomic Energy Authority
Original Assignee
UK Atomic Energy Authority
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 UK Atomic Energy Authority filed Critical UK Atomic Energy Authority
Priority to FR7738285A priority Critical patent/FR2412186A1/en
Publication of FR2412186A1 publication Critical patent/FR2412186A1/en
Withdrawn legal-status Critical Current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)
  • Laser Beam Processing (AREA)

Abstract

A spark plug electrode is made by locating a core of thermally conductive metal co-axially in the box of a tubular outer metal sheath. The sheath is worked down on the core. The core is removed from a region at one end of the sheath and the sheath is melted where core is removed to cause it to seal over the end of the core. The electrode runs cooler and has longer life. The use of additional brazing materials and fillers are avoided. The core may be of Cu, Al or alloys based on these. The outer sheath is of Ni, Ni-based alloy, Mo, stainless steel, refractory metal or metal alloy. The sheath may be worked by swaging or drawing the core and sheath through a die. The melting may be carried out in air or partial vacuum with high energy beam or laser.
FR7738285A 1977-12-19 1977-12-19 Spark plug electrode mfr. - by melting metal core to metal sheath Withdrawn FR2412186A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
FR7738285A FR2412186A1 (en) 1977-12-19 1977-12-19 Spark plug electrode mfr. - by melting metal core to metal sheath

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR7738285A FR2412186A1 (en) 1977-12-19 1977-12-19 Spark plug electrode mfr. - by melting metal core to metal sheath

Publications (1)

Publication Number Publication Date
FR2412186A1 true FR2412186A1 (en) 1979-07-13

Family

ID=9199028

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7738285A Withdrawn FR2412186A1 (en) 1977-12-19 1977-12-19 Spark plug electrode mfr. - by melting metal core to metal sheath

Country Status (1)

Country Link
FR (1) FR2412186A1 (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0044764A1 (en) * 1980-07-17 1982-01-27 Bendix Autolite Corporation Method for manufacturing a center electrode for use in a spark plug
WO1989001717A1 (en) * 1987-08-18 1989-02-23 Robert Bosch Gmbh Process for manufacturing a spark plug for internal combustion engines

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3548472A (en) * 1967-11-15 1970-12-22 Hitachi Ltd Ignition plug and method for manufacturing a center electrode for the same
US3818555A (en) * 1972-04-04 1974-06-25 Nippon Denso Co Method of manufacturing central electrode for spark plug

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3548472A (en) * 1967-11-15 1970-12-22 Hitachi Ltd Ignition plug and method for manufacturing a center electrode for the same
US3818555A (en) * 1972-04-04 1974-06-25 Nippon Denso Co Method of manufacturing central electrode for spark plug

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0044764A1 (en) * 1980-07-17 1982-01-27 Bendix Autolite Corporation Method for manufacturing a center electrode for use in a spark plug
WO1989001717A1 (en) * 1987-08-18 1989-02-23 Robert Bosch Gmbh Process for manufacturing a spark plug for internal combustion engines

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Legal Events

Date Code Title Description
ST Notification of lapse