Method for manufacturing a center electrode for a spark plug

Patent · Tue Nov 10 00:00:00 EST 1987

OSTI ID:5850374

Myers, M G; Barrett, W A

A method of manufacturing an electrode for a spark plug is described comprising the steps of: cutting a piece of inconel wire from a source to define a cylindrical blank member having a first end and a second end; extruding the cylindrical blank to define a central opening that extends from the second end toward the first end; welding a strip of platinum to the first end; chamfering the first end to remove any platinum and weld flash that may have been produced during the welding; forming an extruded tip that extends from the first end such that platinum extends along the chamfered surface to completely cover the weld; inserting a copper member into the central opening; and further extruding the cylindrical blank and copper member to define a finished length for the electrode, establishing a mechanical bond between the copper member and cylindrical blank such that an electrical conductive path is produced between the tip through the blank member into the copper member.

• Assignee: Allied Corp., Morristown, NJ
• Patent Number(s): US 4705486
• OSTI ID: 5850374
• Resource Relation: Patent File Date: Filed date 24 Nov 1986
• Country of Publication: United States
• Language: English

Related Subjects

33 ADVANCED PROPULSION SYSTEMS
36 MATERIALS SCIENCE
SPARK IGNITION ENGINES
ELECTRODES
COPPER
ELECTRIC DISCHARGES
EXTRUSION
FILAMENTS
PLATINUM
WELDING
WIRES
ELEMENTS
ENGINES
FABRICATION
HEAT ENGINES
INTERNAL COMBUSTION ENGINES
JOINING
MATERIALS WORKING
METALS
PLATINUM METALS
TRANSITION ELEMENTS
330101* - Internal Combustion Engines- Spark-Ignition
360101 - Metals & Alloys- Preparation & Fabrication