The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Feb. 04, 2014
Filed:
Mar. 15, 2010
Atsushi Ozeki, Seto, JP;
Atsushi Ozeki, Seto, JP;
NGK Spark Plug Co., Ltd., Nagoya, JP;
Abstract
A method for measuring a deviation from a joint target position of a member to which a measuring object is joined, in particular, measuring the deviation of an electrode position of a spark plug. The deviation of a ground electrode from an optimal igniting position Ois measured while a metallic shell is engaged with a female thread jig. A distance 'ε' between an axis A of the ground electrode and a reference straight line LS is calculated. The distance 'ε' is a vertical length from the axis A to the reference straight line LS. An angle “α” between a first straight line Land the reference straight line LS is calculated using the distance “ε” and a predetermined distance “β” between the axis A of the ground electrode and an axis O of the metallic shell.