Patent · US Expired

Electromagnetic drive mechanism for the printing pin of a print head

US5312195A · kind A · utility

0Cited by

1References

9Claims

0Family size

Assignee

Siemens Nixdorf Informationssysteme AG · DE

Inventors

Dieter Grandke · Kaufungen, DE
Heinrich Hoffmann · Heringen, DE
Detlef Prahl · Laufenburg (Baden), DE
Ralf Reinkemeier · Rietberg, DE
Rolf Roeschlein · Paderborn, DE

Key dates

Filing date	Sep 26, 1991
Grant date	May 17, 1994
Priority date	—
Expiry date	Sep 26, 2011

Classification

Technology area (CPC H)Electricity
CPC primaryH01F7/14
WIPO fieldElectrical machinery, apparatus, energy
WIPO sectorElectrical engineering

Abstract

An electromagnetic driving device for driving a print needle of a printer employing an E-shaped magnetic yoke. In order to improve print speed, the armature and arms of the yoke are specifically dimensioned. The precise lengths and widths of the armature and yoke provide an inductive circuit that minimizes both magnetic losses and inductance.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.