Ballistic print wire actuator using a telescopic armature

Details Ballistic print wire actuator using a telescopic armature Ballistic print wire actuator using a telescopic armature

1982-12-20

1984-11-06

Sewell, Paul T.

Typewriting machines

Typing by other than type-face or type-die

Character formation by impact

101 9305, 335261, B41J 312

Patent

active

044809344

ABSTRACT:
A print wire actuator using a telescopic armature pair is presented. The actuator is disposed to propel a print wire through a predetermined distance from a rest position toward a recording medium. The armature pair moves by electromagnetic force over a first portion of the predetermined distance at which point one piece of the armature reaches a mechanical stop. The second piece of the armature continues to move, both ballistically and magnetically, over the remaining portion of the predetermined distance.

REFERENCES:
patent: 3961298 (1976-06-01), Jaffe et al.
patent: 4211496 (1980-07-01), Naylor
patent: 4230411 (1980-10-01), Grottrup
IBM Tech. Disc. Bulletin, by L. R. Siegl, vol. 23, No. 8, _Jan. 1981, pp. 3545-3546.

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