Patent ID: 8853924
Filing Date: 2014-10-07
Classification: H01T

Abstract:
1. A spark ignition device, comprising: a generally annular ceramic insulator extending along a longitudinal axis of said spark ignition device; a metal shell surrounding at least a portion of said ceramic insulator, said metal shell extending along said longitudinal axis between a proximal end and a distal end, said distal end presenting a planar surface; a center electrode received at least in part in said ceramic insulator and extending coaxially along said longitudinal central axis; and a ground electrode having an attachment end fixed by a weld joint to said distal end of said shell and a free end extending from said distal end to provide a spark gap between said center electrode and said ground electrode, said weld joint including a resistance weld joint and a laser weld joint, and said attachment end of said ground electrode being flush with said planar surface of said distal end of said metal shell.