Abstract: A method for producing a spark plug including a spark plug electrode assembly having a center electrode and a ground electrode surrounding the center electrode. The spark plug electrode assembly is formed from a one-piece spark plug electrode base body made of spark plug electrode material, and the ground electrode and the center electrode are connected to one another by a connecting region, wherein the center electrode and an inner surface of the ground electrode are polygonal. The method includes: a) connecting the spark plug electrode assembly to a spark plug base body, and b) removing the connecting region between the ground electrode and the center electrode.

Abstract: A method for producing a spark plug including a spark plug electrode assembly having a center electrode and a ground electrode surrounding the center electrode. The spark plug electrode assembly is formed from a one-piece spark plug electrode base body made of spark plug electrode material, and the ground electrodeand the center electrode are connected to one another by a connecting region, wherein the center electrode and an inner surface of the ground electrode are polygonal. The method includes: a) connecting the spark plug electrode assembly to a spark plug base body, and b) removing the connecting region between the ground electrode and the center electrode.

Abstract: A method for manufacturing a spark plug electrode system including a ground electrode and a center electrode, which are connected to each other by a joining area, formed from a one-piece spark plug electrode base body made up of spark plug electrode material.

Abstract: The invention relates to a method for operating an internal combustion engine with fuel which is combusted using a spark plug. According to the invention, the aging of the spark plug, in particular the aging of an electric resistor of the spark plug, is monitored during the operation of the internal combustion engine, wherein electromagnetic radiation of the spark plug is detected for monitoring purposes. The invention additionally relates to a controller for carrying out the method.

Abstract: The invention relates to a method for operating an internal combustion engine with fuel which is combusted using a spark plug. According to the invention, the aging of the spark plug, in particular the aging of an electric resistor of the spark plug, is monitored during the operation of the internal combustion engine, wherein electromagnetic radiation of the spark plug is detected for monitoring purposes. The invention additionally relates to a controller for carrying out the method.

Abstract: A method for manufacturing a spark plug electrode system including a ground electrode and a center electrode, which are connected to each other by a joining area, formed from a one-piece spark plug electrode base body made up of spark plug electrode material.

Abstract: A security apparatus for enclosing the branch connections of a cable-TV aerial tap unit to prevent unauthorized used thereof including a box like structure mounted on the bottom of the tap unit to enclose the cables and connections thereof and providing a keyed hinged door to allow access to the interior of the box like structure to access the cables and the method of securing the same by providing either a slidable clip or a rotatable clip attached to the box like structure that has an opening that engages the shank of the existing bolt of the tap unit when the bolt is loosened while the bolt head bears against the slidable or rotatable clip to hold the box like structure in place so as to allow the tightening thereof to secure the apparatus in place.