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In electromagnetic clapper-type armature systems, armature 1 is attrac by electromagnet 2 so that the upper part of the armature actuates the print hammer via a push rod (not shown).
English (United States)
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Clapper Type Armature System for Impact Printers
In electromagnetic clapper-type armature systems, armature 1 is attrac by
electromagnet 2 so that the upper part of the armature actuates the print hammer
via a push rod (not shown).
After the coil energization has been switched off, the armature moves back to
stop 3. For enhancing the print capacity, the armature, rather than being cuboid-
shaped, is T-shaped (Fig. 2) or U-shaped (Fig. 3) or has a rectangular hollow
profile (Fig. 4). Figs. 2 to 4 are cross-sectional views of the armature along line
A-A in Fig. 1.
Such shapes lead to a concentration of the magnetic flux on the armature
surface, faster demagnetization and thus to shorter switch-off times.