GB547119A - Improvements relating to sparking plugs for internal combustion engines - Google Patents
Improvements relating to sparking plugs for internal combustion enginesInfo
- Publication number
- GB547119A GB547119A GB892941A GB892941A GB547119A GB 547119 A GB547119 A GB 547119A GB 892941 A GB892941 A GB 892941A GB 892941 A GB892941 A GB 892941A GB 547119 A GB547119 A GB 547119A
- Authority
- GB
- United Kingdom
- Prior art keywords
- core
- bore
- pressure
- sparking
- heated
- 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
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)
- Spark Plugs (AREA)
Abstract
547,119. Sparking-plugs. LODGE PLUGS, Ltd., HOPPS, B., and SMITHELLS, C. J. July 15, 1941, No. 8929. [Class 7 (iv)] A ceramic insulator a has a central bore b and a metal core e within the bore and in intimate contact for a substantial part of its length with the surface of the bore, this contact being effected by expansion of the core under pressure. preferably while softened by heat at a temperature below its melting point. In one form, Fig. 1, the insulator is fitted with a sparking tip c of platinum or platinum alloy, having a shoulder d, and powdered copper e is rammed into the bore b and the assembly is heated to 950‹C. in a reducing atmosphere while the core is subjected to pressure. In a modification, Fig. 3, a silver rod e is bored to receive the inner end of the sparking tip c and a bead f of conductive sealing material, such as a mixture of glass and graphite or copper, is superposed; the assembly is heated to about 900‹C and a pressure of about 2 tons per square inch applied by a plunger. The sparking tip may be secured to one end of the silver rod e before the latter is inserted in the insulator. In a further form, Fig. 7, the silver core e is tubular and a nickel electrode c has a head g abutting on the upper end of the core ; expansion of the heated core is effected by endwise pressure. In the forms shown in Figs. 1 and 7, a seal such as f, Fig. 3, may be employed. Specification 534,248 is referred to in the Provisional Specification.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB892941A GB547119A (en) | 1941-07-15 | 1941-07-15 | Improvements relating to sparking plugs for internal combustion engines |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB892941A GB547119A (en) | 1941-07-15 | 1941-07-15 | Improvements relating to sparking plugs for internal combustion engines |
Publications (1)
Publication Number | Publication Date |
---|---|
GB547119A true GB547119A (en) | 1942-08-13 |
Family
ID=9862044
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB892941A Expired GB547119A (en) | 1941-07-15 | 1941-07-15 | Improvements relating to sparking plugs for internal combustion engines |
Country Status (1)
Country | Link |
---|---|
GB (1) | GB547119A (en) |
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2603200A (en) * | 1952-07-15 | Smrki plug construction | ||
US2604087A (en) * | 1948-09-22 | 1952-07-22 | Simmonds Aerocessories Inc | Spark plug |
DE951060C (en) * | 1952-03-13 | 1956-10-18 | Bosch Gmbh Robert | Spark plug for internal combustion engines |
DE1208120B (en) * | 1964-06-06 | 1965-12-30 | Bosch Gmbh Robert | Spark plug with platinum spark pin |
US4539503A (en) * | 1981-11-07 | 1985-09-03 | Robert Bosch Gmbh | Rapid-heating, high-temperature-stable spark plug for internal combustion engines |
-
1941
- 1941-07-15 GB GB892941A patent/GB547119A/en not_active Expired
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2603200A (en) * | 1952-07-15 | Smrki plug construction | ||
US2604087A (en) * | 1948-09-22 | 1952-07-22 | Simmonds Aerocessories Inc | Spark plug |
DE951060C (en) * | 1952-03-13 | 1956-10-18 | Bosch Gmbh Robert | Spark plug for internal combustion engines |
DE1208120B (en) * | 1964-06-06 | 1965-12-30 | Bosch Gmbh Robert | Spark plug with platinum spark pin |
US4539503A (en) * | 1981-11-07 | 1985-09-03 | Robert Bosch Gmbh | Rapid-heating, high-temperature-stable spark plug for internal combustion engines |
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