Mounting structure and related method both for a multi-filament incandescent lamp

A method of forming an improved mounting stem structure for a multi-filament incandescent lamp comprising the steps of:

• (a) providing a three-pillar portion stem having inner and outer lead-in wires extending through each of the three pillar portions with one of said outer lead-in wire having a length greater than the other two;
• (b) placing a reverse bend in the central region of each of the shorter inner lead-in wires to be respectively connected to the minor and major filaments;
• (c) placing a slight bend in the central region of the longer inner lead-in wire to be connected to both the minor and the major filaments;
• (d) placing a reverse bend in the inner lead-in wire of step 13(c) at a location along the conductor so as to provide a sufficient distance between one of the inner lead-in wires of step 13(b) and said inner lead-in wire of step 13(c) for latter connection of a minor filament;
• (e) placing hooked-like curvatures into the inner lead-in wires of step 13(d) by positioning said inner lead-in wires against a die having an inner surface with a hooked-like shape and apply a force so that said inner lead-in wires take the shape of said inner surface;
• (f) placing the minor filament between the hooked-like curvatures of the inner lead-in wires of step 13(e) and applying a force to crimp said minor filament in place;
• (g) gripping the inner lead-in wire of step 13(d) and then wrapping the inner lead-in wire around a die to cause the inner lead-in wire to be rotated by bend which reverses the direction of the inner lead-in wire;
• (h) placing hooked-like curvature in the inner lead-in wire of step 13(g) and the other inner lead-in wire of a major filament in a manner given in step 13(e);
• (i) placing and crimping in place the major filament between said hooked-like curvatures of step 13(h) in a manner given in step 13(f);
• and
• (j) applying a rapid and quick force onto the inner lead-in wires respectively connected to the minor and major filament so that each of the inner lead-in wires has a punched curved surface with a depth selected to establish and maintain a preselected turns-per-inch characteristic for each of said minor and major filaments.