Magnetic actuator mechanism

Details Magnetic actuator mechanism Magnetic actuator mechanism

1984-05-29

1986-02-04

Sewell, Paul T.

Typewriting machines

Typing by other than type-face or type-die

Character formation by impact

101 9305, 335274, B41J 312

Patent

active

045682070

ABSTRACT:
An improved magnetic actuator mechanism suitable for dot printing mechanisms for use in a wire matrix dot printer. The present magnetic actuator mechanism comprises an armature movable between a reset position and an actuated position, a permanent magnet for attracting the armature toward the reset position, and an electromagnet which, when energized, generates in the armature a magnetic flux opposite to and larger than the magnetic flux generated therein by the permanent magnet. The armature is thus moved to the actuated position by the turn of the magnetization direction in the armature when the electromagnet is energized. Therefore, in the present invention, the armature can have the magnetic fluxes in the opposite directions by the action of the permanent magnet and electromagnet combination so as to provide the armature of smaller cross sectional area or thickness with a higher magnetic force without causing the magnetic saturation thereof, which allows the use of an armature of less thickness or weight to assure high speed operation in response to a driving signal.

REFERENCES:
patent: 3217640 (1965-11-01), Bradshaw
patent: 4214836 (1980-07-01), Wang
patent: 4449836 (1984-05-01), Yamada

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