US1386883A - Spark-plug - Google Patents

Spark-plug Download PDF

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Publication number
US1386883A
US1386883A US339830A US33983019A US1386883A US 1386883 A US1386883 A US 1386883A US 339830 A US339830 A US 339830A US 33983019 A US33983019 A US 33983019A US 1386883 A US1386883 A US 1386883A
Authority
US
United States
Prior art keywords
porcelain
shell
unglazed
glazed
spark
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 - Lifetime
Application number
US339830A
Other languages
English (en)
Inventor
Taine G Mcdougal
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.)
CHAMPION IGNITION CO
Original Assignee
CHAMPION IGNITION 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 CHAMPION IGNITION CO filed Critical CHAMPION IGNITION CO
Priority to US339830A priority Critical patent/US1386883A/en
Priority to FR522849A priority patent/FR522849A/fr
Application granted granted Critical
Publication of US1386883A publication Critical patent/US1386883A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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
    • H01T13/36—Sparking plugs characterised by features of the electrodes or insulation characterised by the joint between insulation and body, e.g. using cement
    • 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
    • H01T13/38—Selection of materials for insulation

Definitions

  • unglazed belt or belts may be formed in different ways, and while the position and extent of the unglaze'd area is subject to variation, I prefer to simply guard a single wide belt extending over the zone or zones of contact of the porcelain with the shell or retaining elements in such manner as to protect it from the glazespray ,in the glazing operation. By proceeding in this manner, the objects sought are accomplished with substantially no increase in expense.
  • Figure 1 is a central vertical section showing one well known typeof plugto which the invention is applicable. It will be understood that the particular plug selected is merely by way of example; in other words,
  • the invention may be applied equally well to the other types of plugs iii common use.
  • Fig. 2 is an elevation of the porcelain and central electrode which appears in Fig. 1.
  • the metal shell 1, in the construction shown, is provided with a shoulder 2, on which the central rib 3 of the porcelain bears,
  • Metalhcreta nmg means, which in this instance in the form of a pressed or spun flange 5 and an interposed sealing washer 6,
  • I protect the surface of the rib and the adjoining surface ofthe upper and lower end portions of the porcelain so that when the glazing liquid is sprayed thereon an unglazed belt, wide enough to extend from some distance below the shoulder 2 to some distance above the flange 5, is retained, thereby eliminating contact between the metal shell or retaining elements and the glaze.
  • the actual construction may of course be varied but the unglazed gap or gaps should be interposed between the shell and both the upper and the lower end of the electrode.
  • shell structure in a sense such as to include both a one-piece shell such as shown. and a shell built up from two or more members or elements.
  • a spark plug including ashell struca glazed porcelain, retaining means carried by said shell structure for engaging the porcelain, an electrode passing through the porcelain and projecting at each end thereof, there being an unglazed portion between the retaining means and each end of said porcelain to more completely break electrical connection between the shell and both ends of the electrode.
  • a spark plug including a shell structure, a glazed porcelain, an electrode passing through the porcelain and projecting at each endthereof, the end portions of the porcelain being glazed throughout the greater part of their length, and the intermediate portion of the porcelain being unglazed over a wide belt wherein it contacts with the shell structure and "retaining means car: ied by said shell structure for engaging onlyof said porcelain.
  • a porcelain insulator for spark plugs having an aperture to receive an electrode, said insulator having its end portions glazed and having an unglazed portion between its ends, said unglazed portion being adapted to be engaged by retaining means and to prevent the contact of the latter with said glazed portions.
  • a porcelain insulator provided with means for receiving an electrical conductor and having glazed and unglazed portions thereon, and a support for said insulator engaging said unglazed portion only.

Landscapes

  • Spark Plugs (AREA)
US339830A 1919-11-22 1919-11-22 Spark-plug Expired - Lifetime US1386883A (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
US339830A US1386883A (en) 1919-11-22 1919-11-22 Spark-plug
FR522849A FR522849A (fr) 1919-11-22 1920-08-25 Bougies d'allumage

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US339830A US1386883A (en) 1919-11-22 1919-11-22 Spark-plug

Publications (1)

Publication Number Publication Date
US1386883A true US1386883A (en) 1921-08-09

Family

ID=23330793

Family Applications (1)

Application Number Title Priority Date Filing Date
US339830A Expired - Lifetime US1386883A (en) 1919-11-22 1919-11-22 Spark-plug

Country Status (2)

Country Link
US (1) US1386883A (fr)
FR (1) FR522849A (fr)

Also Published As

Publication number Publication date
FR522849A (fr) 1921-08-06

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