Magnetic circuit for matrix print head

Details Magnetic circuit for matrix print head Magnetic circuit for matrix print head

1986-01-27

1987-09-22

Sewell, Paul T.

Typewriting machines

Typing by other than type-face or type-die

Character formation by impact

101 9305, B41J 312

Patent

active

046951741

ABSTRACT:
A matrix print head includes a magnetic yoke plate, magnetic pole defining cores annularly arranged on the yoke plate, electromagnetic coils mounted on the cores, a permanent magnet plate arranged in magnetic conductive relationship to the yoke plate; the yoke plate, the cores, coils, and permanent magnet plate establishing an electromagnetic assembly, there being additionally an armature assembly including an armature plate and a plurality of deflectable radially extending armature arms, the armature assembly being arranged in relation to the electromagnetic assembly such that the armature arms cooperate with the electromagnetic cores, there being print elements such as styli connected to the armature arms; the improvement disclosed is comprised of the following features, the armature plate and the armature arms are physically separated from each other but resiliently interconnected to establish a single uncritical parasitic air gap; and the magnetic yoke and armature plates are radially, inwardly recessed vis-a-vis the permanent magnet plate. A radially inwardly and outwardly recessed intermediate plate is interposed between the permanent magnet and the armature ring.

REFERENCES:
patent: 4136978 (1979-01-01), Bellinger
patent: 4244658 (1981-01-01), Mori
patent: 4348120 (1982-09-01), Isobe
patent: 4433926 (1984-02-01), Isobe
patent: 4498791 (1985-02-01), Gilbert

Affiliated with

Also associated with

Rating

Magnetic circuit for matrix print head does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Magnetic circuit for matrix print head, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Magnetic circuit for matrix print head will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-2055556