Matrix print wire solenoid

Details Matrix print wire solenoid Matrix print wire solenoid

1977-10-27

1979-01-30

Broome, Harold

Electricity: magnetically operated switches, magnets, and electr

Magnets and electromagnets

Combined with diverse-type art device

335255, 335258, 400124, H01F 716

Patent

active

041375130

ABSTRACT:
A matrix print wire solenoid has a small diameter print wire which wire is propelled against printing paper and inking ribbon by the linear motion of the solenoid plunger, to which the print wire is attached, in an improved impact printer having a plurality of solenoids positioned in a row for use in dot matrix printing. The solenoid features a low cost construction, a reduction in size, and increased operating speed, and has pole pieces which are separated by an inner gap and which pieces are aligned with a coil bobbin which provides a guide surface for the armature plunger. The space between the plunger and a forward bushing or spacer is occupied by a coil spring which has one end seated over a portion of the armature and the other end seated against the face of the bushing. The coil bobbin defines an air gap between one pole piece and the armature.

REFERENCES:
patent: 4014425 (1977-03-01), Henricus
patent: 4016965 (1977-04-01), Wirth

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