GB1238225A - - Google Patents
Info
- Publication number
- GB1238225A GB1238225A GB1238225DA GB1238225A GB 1238225 A GB1238225 A GB 1238225A GB 1238225D A GB1238225D A GB 1238225DA GB 1238225 A GB1238225 A GB 1238225A
- Authority
- GB
- United Kingdom
- Prior art keywords
- per cent
- glass
- inert filler
- resistor composition
- charable
- 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
- H01T13/00—Sparking plugs
- H01T13/40—Sparking plugs structurally combined with other devices
- H01T13/41—Sparking plugs structurally combined with other devices with interference suppressing or shielding means
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Combustion & Propulsion (AREA)
- Spark Plugs (AREA)
- Non-Adjustable Resistors (AREA)
- Glass Compositions (AREA)
- Thermistors And Varistors (AREA)
Abstract
1,238,225. Resistor composition. GENERAL MOTORS CORP. 5 Dec., 1968 [21 Dec., 1967], No. 57750/68. Heading C1M. [Also in Divisions F1 and H1] A spark plug resistor composition 32 comprises glass of softening temperature 1500- 1750‹ F., an inert filler and zinc, antimony or tellurium powder. A preferred composition is: Glass: 20-75 wt. per cent. Inert Filler: 15-79À3 wt. per cent. Semiconductor material: 0-60 wt per cent. Carbon Black: 0À1-4À0 wt per cent. Inorganic Binder (e.g. Bentonite): 0-3 wt. per cent. Water soluble charable carbon containing material: 0À1-4 wt. per cent. Zinc, Antimony (Tellurium): 2-15 (0À5-5) wt. per cent. The inert filler may be kyanite, borolon, ZrO 2 , mullite or chromium oxide. The water-soluble charable carbon containing material may be dextrin, sucrose, methyl cellulose, corn flour, polyvinyl alcohol or glycerine. The glass is preferably barium borate glass (examples given). The semi-conductor may be TiO 2 -ZrO 2 ; Ta 2 O 5 -ThO 2 ; Ta 2 O 5 -CeO 2 ; Ta 2 O 5 -Di 2 O 4 ; or the oxides of Ti, Sn, Ta, V, Mo and W. The spark plug 10 may be made by positioning centre electrode 24 (e.g. of Ni) in the centre bore 18 of insulator 16 (e.g. of Al 2 O 3 ) and ramming down the granulated resistor composition 32 above it. A conductive glass seal 36 (e.g. of Cu and Zn and a borosilicate glass) is added on top and terminal screw 30 positioned within the assembly, which is then heated to, e.g. 1550-1750‹ F. to soften the glass and melt the metal, which metal 34 coats the electrode 24. Screw 30 is then tightened. The formed assembly is then assembled inside metal shell 12 to form the plug.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US69248567A | 1967-12-21 | 1967-12-21 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB1238225A true GB1238225A (en) | 1971-07-07 |
Family
ID=24780770
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB1238225D Expired GB1238225A (en) | 1967-12-21 | 1968-12-05 |
Country Status (4)
| Country | Link |
|---|---|
| US (1) | US3577355A (en) |
| DE (1) | DE1814548C3 (en) |
| FR (1) | FR1598487A (en) |
| GB (1) | GB1238225A (en) |
Families Citing this family (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE2245403C2 (en) * | 1972-09-15 | 1984-04-05 | Robert Bosch Gmbh, 7000 Stuttgart | Electrically conductive sealant for spark plugs and methods of manufacturing the same |
| JPS5232080B2 (en) * | 1972-11-08 | 1977-08-19 | ||
| JPS5211758B2 (en) * | 1972-11-17 | 1977-04-01 | ||
| US4112330A (en) * | 1977-05-20 | 1978-09-05 | General Motors Corporation | Metallized glass seal resistor compositions and resistor spark plugs |
| US4146677A (en) * | 1977-08-18 | 1979-03-27 | Trw Inc. | Resistor material, resistor made therefrom and method of making the same |
| US4172922A (en) * | 1977-08-18 | 1979-10-30 | Trw, Inc. | Resistor material, resistor made therefrom and method of making the same |
| US4289538A (en) * | 1978-09-13 | 1981-09-15 | Corning Glass Works | Sealing glass-ceramic articles |
| JPS5613687A (en) * | 1979-07-13 | 1981-02-10 | Hitachi Ltd | Resistance glass sealed ignition plug |
| DE3546922C2 (en) * | 1984-01-18 | 1997-09-04 | Ngk Spark Plug Co | Spark plug resistance compsns. |
| US4601848A (en) * | 1984-01-18 | 1986-07-22 | Ngk Spark Plug Co., Ltd. | Resistor compositions for producing a resistor in resistor-incorporated spark plugs |
| DE3905315A1 (en) * | 1989-02-21 | 1990-08-23 | Beru Werk Ruprecht Gmbh Co A | Electroconductive glass composition |
| JP3500555B2 (en) * | 1996-03-29 | 2004-02-23 | 日本特殊陶業株式会社 | Spark plug for internal combustion engine |
-
1967
- 1967-12-21 US US692485A patent/US3577355A/en not_active Expired - Lifetime
-
1968
- 1968-12-05 GB GB1238225D patent/GB1238225A/en not_active Expired
- 1968-12-10 DE DE1814548A patent/DE1814548C3/en not_active Expired
- 1968-12-18 FR FR1598487D patent/FR1598487A/fr not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| FR1598487A (en) | 1970-07-06 |
| DE1814548A1 (en) | 1969-10-02 |
| DE1814548C3 (en) | 1974-08-22 |
| US3577355A (en) | 1971-05-04 |
| DE1814548B2 (en) | 1974-01-31 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PS | Patent sealed [section 19, patents act 1949] | ||
| PCNP | Patent ceased through non-payment of renewal fee |