Head for wire dot printer

Details Head for wire dot printer Head for wire dot printer

1985-03-05

1986-12-02

Sewell, Paul T.

Typewriting machines

Typing by other than type-face or type-die

Character formation by impact

101 9305, 400694, 420 37, B41J 312, C22C 3818

Patent

active

046261168

ABSTRACT:
A wire dot printer head comprising a leaf spring welded to an armature and biased by a permanent magnet, and a magnetic coil adapted to erase the magnetic field of the permanent magnet so as to release the leaf spring and to drive a print wire. The leaf spring is made of an alloy which consists essentially of 13-14 wt % Cr, 0.37-0.43 wt % C, 0.25-0.5 wt % Si, 0.3-0.5 wt % Mn, 1.15-1.35 wt % Mo and the balance Fe. The alloy makes the width of the weld metal of the leaf spring wide and its depth of weld penetration deep and thus minimizes the generation of micro-cracking.

REFERENCES:
patent: 3772005 (1973-11-01), de Barbadillo
patent: 3826697 (1974-07-01), Carlen
patent: 4544406 (1985-10-01), Yamamoto

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