GB545069A - Improved spark plug - Google Patents

Improved spark plug

Info

Publication number
GB545069A
GB545069A GB7917/41A GB791741A GB545069A GB 545069 A GB545069 A GB 545069A GB 7917/41 A GB7917/41 A GB 7917/41A GB 791741 A GB791741 A GB 791741A GB 545069 A GB545069 A GB 545069A
Authority
GB
United Kingdom
Prior art keywords
electrode
glass
pellets
per cent
insulator
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
GB7917/41A
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.)
Motors Liquidation Co
Original Assignee
Motors Liquidation Co
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 Motors Liquidation Co filed Critical Motors Liquidation Co
Publication of GB545069A publication Critical patent/GB545069A/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
    • H01T13/34—Sparking plugs characterised by features of the electrodes or insulation characterised by the mounting of electrodes in insulation, e.g. by embedding

Landscapes

  • Spark Plugs (AREA)

Abstract

545,069. Sparking plugs. GENERAL MOTORS CORPORATION. June 24, 1941, No. 7917. Convention date, July 3, 1940. Addition to 494,701. [Class 7 (iv)] [Also in Groups XXIII and XXXVI] The central electrode 26 of a spark plug is sealed in the bore of the insulator 10 by means of a fused mixture of glass and metal, the portion 21 of the seal being made of glass of greater plasticity than that of which the portion 17 is made. In assembling, separate pellets of the two kinds of mixtures are placed between the head 16 of the lower part of the electrode and the threaded lower end of the upper part of the electrode, and after the parts have been heated to soften the pellets they are forced into position as shown. The lower part of the electrode fits the bore closely and the upper part loosely. The pellets are preferably made of boro-silicate glass together with copper, iron, cobalt, nickel, tungsten or molybdenum, with or without a binder which is driven off during sealing, specific examples of suitable proportions of each of these metals being given. The borosilicate glass may consist of 50 per cent. of B 2 O 3 , 20 per cent of PbO, and 30 per cent. of SiO 2 . The invention may be applied also to the one-piece electrodes shown in Figs. 3 and 4 of the parent Specification and the insulator may be secured within the shell 41 by similar sealing means 40.
GB7917/41A 1940-07-03 1941-06-24 Improved spark plug Expired GB545069A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US545069XA 1940-07-03 1940-07-03

Publications (1)

Publication Number Publication Date
GB545069A true GB545069A (en) 1942-05-08

Family

ID=21991565

Family Applications (1)

Application Number Title Priority Date Filing Date
GB7917/41A Expired GB545069A (en) 1940-07-03 1941-06-24 Improved spark plug

Country Status (1)

Country Link
GB (1) GB545069A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0548922A2 (en) * 1991-12-24 1993-06-30 BERU Ruprecht GmbH & Co. KG Electric conductive element and method of making the same

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0548922A2 (en) * 1991-12-24 1993-06-30 BERU Ruprecht GmbH & Co. KG Electric conductive element and method of making the same
EP0548922A3 (en) * 1991-12-24 1994-01-19 Beru Werk Ruprecht Gmbh Co A

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