GB817935A - Improvements in or relating to a process for the manufacture of low tension sparkingplugs - Google Patents

Improvements in or relating to a process for the manufacture of low tension sparkingplugs

Info

Publication number
GB817935A
GB817935A GB23749/56A GB2374956A GB817935A GB 817935 A GB817935 A GB 817935A GB 23749/56 A GB23749/56 A GB 23749/56A GB 2374956 A GB2374956 A GB 2374956A GB 817935 A GB817935 A GB 817935A
Authority
GB
United Kingdom
Prior art keywords
per cent
cement
electrodes
mounting
heating
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
GB23749/56A
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.)
Renault SAS
Regie Nationale des Usines Renault
Original Assignee
Renault SAS
Regie Nationale des Usines Renault
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 Renault SAS, Regie Nationale des Usines Renault filed Critical Renault SAS
Publication of GB817935A publication Critical patent/GB817935A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
    • H01B3/00—Insulators or insulating bodies characterised by the insulating materials; Selection of materials for their insulating or dielectric properties
    • H01B3/02—Insulators or insulating bodies characterised by the insulating materials; Selection of materials for their insulating or dielectric properties mainly consisting of inorganic substances
    • H01B3/08—Insulators or insulating bodies characterised by the insulating materials; Selection of materials for their insulating or dielectric properties mainly consisting of inorganic substances quartz; glass; glass wool; slag wool; vitreous enamels
    • H01B3/087—Chemical composition of glass

Landscapes

  • Chemical & Material Sciences (AREA)
  • Inorganic Chemistry (AREA)
  • Developing Agents For Electrophotography (AREA)
  • Powder Metallurgy (AREA)
  • Spark Plugs (AREA)
  • Glass Compositions (AREA)

Abstract

817,935. Moulding sparking plugs. REGIE NATIONALE DES USINES RENAULT. Aug. 1, 1956 [Aug. 1, 1955], No. 23749/56. Class 87(2). [Also in Groups XXIII and XXVII] A cartridge for a low tension sparking plug is made by placing the electrodes 1, 2 on a mounting, filling the space between the electrodes with an insulation compound 3 in granular or powder form, the compound having the following composition by weight : PbO 50-90 per cent., B2O3 5-30 per cent., SiO2 0-20 per cent., ZiO2 0-10 per cent., Al2O3 0-20 per cent., ZnO 0-10 per cent., alkaline oxides 0-2 per cent. and heating the assembly to a temperature between 500‹C. and 900‹C. in a non-reducing atmosphere which contains not more than 2 per cent. oxygen. A number of specific compositions are quoted in the Specification. The mounting is of steel and comprises members 5, 6. A steel plate 7 may obturate the bore in the electrode 1 or the bore may be stopped by filling it with silver, copper or an alloy having a base of these metals. The cement or powder is introduced at 8 and can be packed by vibration. A current of argon is introduced into the furnace chamber and the heating carried out. The cement is prepared by heating, for example by electric induction to 850‹C. It is poured, cooled and then crushed. Crystal glass may be used in preparing the cement. Alternatively the cement may be prepared by melting together all the constituents other than alumina grinding the mass obtained and mixing it with calcined alumina in powdered form. In a modified method of manufacture after positioning the electrodes in the mounting they can be rendered fast with one another by forcing into the spark gap a small mica cylinder constituted by a roll of thin foil. Specification 802,011 [Group XXVII] is referred to.
GB23749/56A 1955-08-01 1956-08-01 Improvements in or relating to a process for the manufacture of low tension sparkingplugs Expired GB817935A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR817935X 1955-08-01

Publications (1)

Publication Number Publication Date
GB817935A true GB817935A (en) 1959-08-06

Family

ID=9268610

Family Applications (1)

Application Number Title Priority Date Filing Date
GB23749/56A Expired GB817935A (en) 1955-08-01 1956-08-01 Improvements in or relating to a process for the manufacture of low tension sparkingplugs

Country Status (2)

Country Link
DE (1) DE1139064B (en)
GB (1) GB817935A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2144906A (en) * 1983-07-01 1985-03-13 Philips Nv Piezo-electric sensor and method of manufacture

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE151482C (en) *
DE339325C (en) * 1918-05-29 1921-07-21 Charles Emile Gerbaud Process for the production of spark plugs for internal combustion engines
DE342241C (en) * 1920-05-28 1921-10-15 Gen Ceramics Company Process for the manufacture of spark plug insulators
US1455853A (en) * 1921-10-27 1923-05-22 Pyle D Franklin Apparatus for making spark plugs
DE477467C (en) * 1928-07-29 1929-06-07 Luigi Bruzzone Process for the production of spark plugs for internal combustion engines
US2135297A (en) * 1937-09-25 1938-11-01 Heriberto A Vila Spark plug
US2286515A (en) * 1940-09-11 1942-06-16 Spark King Corp Spark plug and method of making the same
DE883216C (en) * 1949-06-27 1953-07-16 Smitsvonk Nv Insulating layer for low voltage spark plug
GB719628A (en) * 1951-10-09 1954-12-08 Plessey Co Ltd Improvements in or relating to sparking plug assemblies

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2144906A (en) * 1983-07-01 1985-03-13 Philips Nv Piezo-electric sensor and method of manufacture

Also Published As

Publication number Publication date
DE1139064B (en) 1962-10-31

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