Sparkplug with precision gap

A sparkplug for the internal combustion engine comprising:

• a) a core electrode having a horizontal firing end a horizontal terminal end and a center line, wherein
• i) the horizontal firing end is connected to the horizontal terminal end vertically by an outside diameter,
• ii) the outside diameter is parallel with the center line and is a predetermined size,
• b) an insulator that wraps around the core electrode horizontal terminal end tightly surrounding a portion of the core electrode outside diameter and protruding vertically in the direction towards the horizontal firing end of the core electrode and terminating prior to the horizontal end, whereby leaving a portion of the electrode cores diameter not surrounded by the insulator,
• c) an electrode donut that is flat with a thickness that is no less than 0.030″ and no more than 0.065″ having an outside diameter firing surface, an inside diameter locating hole and a flat top, wherein
• i) the inside diameter locating hole is no less than 0.002″ larger and no more than 0.005″ larger than the outside diameter of the core electrode and wraps around the core electrode outside diameter surrounding the portion that is not surrounded by the insulator, whereby being located between the horizontal firing end of the core electrode and the insulator and is permanently bonded to the core electrode by means of welding,
• d) a primary shell that wraps around the insulator surrounding the horizontal terminal end of the electrode core having a barrel portion that protrudes vertically in the direction towards the horizontal firing end of the core electrode and terminates prior to the electrode donut leaving a portion of the insulator not surrounded by the primary shell, wherein
• i) the barrel portion has a diameter that is a locating surface and is exactly concentric to the firing surface of the electrode donut whereby being the means for exact horizontal central location,
• ii) the portion of the primary shell that does not protrude creates a horizontal surface that is a mating surface and is perpendicular to the center line of the core electrode whereby being the means for vertical location,
• e) a ground sleeve with a horizontal firing end, a horizontal shoulder end and a cylindrical surface, wherein
• i) the cylindrical surface has an inside diameter that is a base dimension with a variable numeric value used in multiple formulas whereby being the means to determine the size of;
• a. the diameter of the electrode donut,
• b. the diameter of the barrel portion of the primary shell,
• ii) a portion of the cylindrical surface presses vertically on to the barrel portion locating surface of the primary shell terminating at the shoulder portion mating surface of the primary shell whereby the horizontal firing end is disposed contiguous with the flat top of the electrode donut,
• iii) a portion of the cylindrical surface surrounds the firing surface of the electrode donut at the horizontal firing end of the core electrode and terminates vertically prior to the firing surface of the electrode donut creating a horizontal gap that extends vertically in the direction towards the horizontal shoulder end whereby being a spark potential area,
• iv) the spark potential area is no more than 0.0005″ larger and no more than 0.0005″ smaller than the predetermined size, whereby having no physical bias,
• v) the ground sleeve is partially wrapped with mounting threads, and has an attachment surrounding the shoulder portion of the primary shell and is made permanent by means of welding or flange.