Patent ID: 7574960

Claim:
An ignition element, comprising: an electrode housing comprising a thread portion and at least one cavity; an electrode being disposed in the electrode housing, wherein the electrode comprises a first end disposed in each of said at least one cavity and a second end opposite the first end; at least one insulator disposed between the electrode and the electrode housing, wherein each of said at least one insulator comprises polyetheretherketone; a resistance element disposed between the first end of the electrode and a headstock; a pyrotechnic ignition charge being disposed in said each of said at least one cavity; at least one burst disk being in contact with the electrode housing and covering said at least one cavity for separating the pyrotechnic ignition charge from a primer charge, wherein the pyrotechnic ignition charge ruptures said at least one burst disk upon ignition and ignites the primer charge, wherein the resistance element is capable of generating a sufficient amount of heat to ignite the pyrotechnic ignition charge upon application of a current to the second end of the electrode, and wherein the primer charge comprises about 850 grams of black powder disposed in a single booster holder.