Method for measuring deviation of joint position of member and method for producing spark plug

In a method for measuring deviation of a ground electrode from an optimal igniting position, a metallic shell is engaged with a female thread jig. Then the axis O of the metallic shell, a predetermined first measuring point P1 and a predetermined second measuring point P2 on a front end face of the...

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Bibliographische Detailangaben
1. Verfasser:	OZEKI ATSUSHI
Format:	Patent
Sprache:	eng
Schlagworte:	BASIC ELECTRIC ELEMENTS CORONA DEVICES ELECTRICITY GENERATING IONS TO BE INTRODUCED INTO NON-ENCLOSED GASES MEASURING MEASURING ANGLES MEASURING AREAS MEASURING IRREGULARITIES OF SURFACES OR CONTOURS MEASURING LENGTH, THICKNESS OR SIMILAR LINEARDIMENSIONS OVERVOLTAGE ARRESTERS USING SPARK GAPS PHYSICS SPARK GAPS SPARKING PLUGS TESTING
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Beschreibung
Zusammenfassung:	In a method for measuring deviation of a ground electrode from an optimal igniting position, a metallic shell is engaged with a female thread jig. Then the axis O of the metallic shell, a predetermined first measuring point P1 and a predetermined second measuring point P2 on a front end face of the ground electrode are detected. Then, a circumferential angle beta1 formed between a reference straight line "LS" connecting O to the optimal igniting position O1, and a first straight line L1 which connects O to P1 is measured, followed by a measurement of a circumferential angle beta2 formed between LS and a second straight line L2 connecting O to P2 Thereafter, the deviation of the ground electrode from O1 is measured as a circumferential angle "alpha" between "LS" and a third straight line L3 connecting the axis O to the center C of the front end face.