| 摘要 |
A printing head for forming dot matrix characters which includes a wire stylus assembly having a plurality of guide bearings spaced to reduce the wear of the tip bearing, and to minimize buckling and resonances. Each stylus is driven by an electromagnetic actuator having a hinged armature, with the stylus drive point at the center of percussion of the armature with respect to the hinge line. Damping is effected at the same point. The armatures are shaped to drive the styli directly in line with the stylus wires without introducing a moment. Individual adjustments for magnetic gap are provided. A retainer device for holding all of the armatures in place during assembly is also provided.
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