Matrix print head of hinged-clapper-armature construction

Details Matrix print head of hinged-clapper-armature construction Matrix print head of hinged-clapper-armature construction

1989-11-30

1991-04-23

Burr, Edgar S.

Typewriting machines

Typing by other than type-face or type-die

Character formation by impact

101 9305, B41J 2235

Patent

active

050095293

ABSTRACT:
A matrix pin print head of the hinged clapper armature construction includes several pin systems which, in each case, include a magnetic yoke limb pair (2), an electromagnetic coil (3), a hinged clapper armature (4), and a print pin (1). The multiple pin system further includes an electromagnetic coil support (13), which is produced by way of sintering or precision-casting, and which forms a single-piece component together with a base plate and the magnet yoke limb pairs (2). In a system with a low number of pins such as nine pins, the electromagnetic coil support (13) exhibits radially outwardly individual magnet yoke limbs (2a) and an armature guide, wherein the individual hinged clapper armatures (4) are precisely positioned and without cause for a loss of magnetic energy. In each case, the magnetic yoke limbs are directed toward a pin engagement point (8) or, respectively, to a pin attachment position (8b). The radial inner magnet yokes are formed to a closed, circular, or polygonal ring (17). Guide means (18), coordinated in each case to a course of pivot motions of the hinged clapper armatures (4), are coordinated to the hinged clapper armatures (4), where the guide means (18) cooperate with the receiving means (19) at the closed ring (17).

REFERENCES:
patent: 4273452 (1981-06-01), Honma
patent: 4537520 (1985-08-01), Ochiai et al.
patent: 4594010 (1986-06-01), Jachno
patent: 4626115 (1986-12-01), Norigoe

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