| 摘要 |
For use in a welded resistor grid assembly moving a plurality of generally parallel, relatively think plate-like metal elements disposed between a pair of spaced-apart insulating support members having a plurality of slotted openings in their opposing sidewalls, a metal element having a substantially rectangular plate-like body of predetermined width, a coplanar flat segment of the same width at one end of the body, a laterally offset flat segment of the same width at the opposite end of the body, the upraised side of the later segment having a flat surface adapted to be joined by a seam weld to the flat surface of the other side of the coplanar segment of another duplicate element after two such elements are placed side by side with opposite orientation so that the offset flat segment of one adjoins the coplanar flat segment of the other, and a border segment of the same width contiguous and generally coplanar with a first one of the flat segments, the border segment being adapted to enter a slotted opening in the sidewall of one of the support members of the assembly. The border segment is characterized by a plurality of protrusions, one of which forms a physical stop against which the distal end of the second flat segment of another duplicate element can abut. A triad of additional protuberances, each adapted to enter a correspondingly dimenstioned area of the slotted opening, is arranged to center the border segment in the slotted opening when a plurality of duplicate elements are welded and installed in the register grid assembly.
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