UST866031I4 - Johns process for forming passages in threaded members - Google Patents
Johns process for forming passages in threaded members Download PDFInfo
- Publication number
- UST866031I4 UST866031I4 US866031DH UST866031I4 US T866031 I4 UST866031 I4 US T866031I4 US 866031D H US866031D H US 866031DH US T866031 I4 UST866031 I4 US T866031I4
- Authority
- US
- United States
- Prior art keywords
- johns
- threaded members
- forming passages
- passages
- threaded
- 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.)
- Pending
Links
- 238000000034 method Methods 0.000 title description 4
- 229910052751 metal Inorganic materials 0.000 description 4
- 239000002184 metal Substances 0.000 description 4
- 238000005096 rolling process Methods 0.000 description 2
- 229910052782 aluminium Inorganic materials 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
Images
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
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T82/00—Turning
- Y10T82/30—Miscellaneous
Definitions
- the side electrode then can be located in the passage without interference from such deformed metal and the spark plug can be installed in an engine head made of soft metal such as aluminum without the risk of burrs or other irregularities destroying the corresponding threads in the head.
- a counterbore 0.1285 inch in diameter and 0.030 inch deep for a passage 0.069 inch in diameter adequately absorbs metal deformed during thread rolling. The same procedure can be used wherever an accurate passage is desired in the threaded portion of a member.
Landscapes
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Spark Plugs (AREA)
Description
DEFENSIVE PUBLICATION UNITED STATES PATENT OFFICE Published at the request of the applicant or owner in accordance with the Notice of Apr. 11, 1968, 849 0.G. 1221. Identification is by serial number of the application and the heading indicates the number of pages of specification, including claims, and of sheets of drawing contained in the application as originally filed. The file of this application is available to the public for inspection; reproduction may be purchased for 30 cents per sheet.
Applications published under the Defensive Publication Program have not been examined as to the merits of alleged invention. The Patent Oflice makes no assertion as to the novelty of the disclosed subject matter.
PUBLISHED SEPTEMBER 30, 1969 737,915 PROCESS FOR FORMING PASSAGES IN THREADED MEMBERS Robert C. Johns, Fostoria, Ohio, assignor to Ford Motor Company, Dearborn, Mich., a corporation of Delaware Filed June 18, 1968. Published Sept. 30, 1969 Int. Cl. H01t 13/00 US. 'Cl. 29--25.12 1 Sheet Drawing. 4 Pages Specification Shells of spark plugs intended to have staked side electrodes are drilled before threads are formed thereon and the passages are counterbored on the surface to be threaded. During thread rolling, metal is deformed into the counterbore but does not interfere with the size of the hole or produce burrs on the threads. The side electrode then can be located in the passage without interference from such deformed metal and the spark plug can be installed in an engine head made of soft metal such as aluminum without the risk of burrs or other irregularities destroying the corresponding threads in the head. In a typical spark plug having rolled 14 mm. threads, a counterbore 0.1285 inch in diameter and 0.030 inch deep for a passage 0.069 inch in diameter adequately absorbs metal deformed during thread rolling. The same procedure can be used wherever an accurate passage is desired in the threaded portion of a member.
DEF. PUB.
PROCESS FOR FORMING PASSAGES IN THREADED MEMBERS R. C. JOHNS Sept. 30, 1969 Filed June 18, 1968 F/Gl ROBERT C. JOHNS INVENTUR. 7,45%
ATTORNEYS
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US73791568A | 1968-06-18 | 1968-06-18 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| UST866031I4 true UST866031I4 (en) | 1969-09-30 |
Family
ID=24965795
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| US866031D Pending UST866031I4 (en) | 1968-06-18 | 1968-06-18 | Johns process for forming passages in threaded members |
Country Status (1)
| Country | Link |
|---|---|
| US (1) | UST866031I4 (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US10177539B2 (en) * | 2015-01-28 | 2019-01-08 | Federal-Mogul Ignition Company | Method and tooling for making an insulator for a condition sensing spark plug |
| EP3493340B1 (en) | 2017-11-30 | 2021-01-20 | Robert Bosch GmbH | Ignition plug with extended housing and grounding electrode on the inside of the housing |
| WO2024132510A1 (en) | 2022-12-20 | 2024-06-27 | Robert Bosch Gmbh | Electrode with decentralized ignition surface, spark plug comprising such an electrode, and method for producing such a spark plug |
-
1968
- 1968-06-18 US US866031D patent/UST866031I4/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US10177539B2 (en) * | 2015-01-28 | 2019-01-08 | Federal-Mogul Ignition Company | Method and tooling for making an insulator for a condition sensing spark plug |
| EP3493340B1 (en) | 2017-11-30 | 2021-01-20 | Robert Bosch GmbH | Ignition plug with extended housing and grounding electrode on the inside of the housing |
| WO2024132510A1 (en) | 2022-12-20 | 2024-06-27 | Robert Bosch Gmbh | Electrode with decentralized ignition surface, spark plug comprising such an electrode, and method for producing such a spark plug |
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