The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Apr. 23, 1991
Filed:
Nov. 30, 1989
Bernd Gugel, Ulm-Einsingen, DE;
Clemens Kaufmann, Ulm, DE;
Herbert Kitzberger, Oberstotzingen, DE;
Kurt Rohrer, Niederstotzingen, DE;
Mannesmann Aktiengesellschaft, Dusseldorf, DE;
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).