Magnetic head pivotal support with compact drive means

US4196456A · kind A · utility

Assignee

• BASF SE

Inventors

• Klaus Manzke · Wassertrüdingen, DE
• Peter Hammerschmitt · Eslarn, DE
• Karl Uhl

Key dates

• Filing date: May 17, 1978
• Grant date: Apr 1, 1980
• Expiry date: May 17, 1998

Classification

• Technology area (CPC G): Physics
• CPC primary: G11B5/54
• WIPO field: Audio-visual technology
• WIPO sector: Electrical engineering

Abstract

A positioning device for objects of low mass, particularly magnetic heads in memory processing units having at least one pivotable head support and at least one pivotable support for at least one coil, which coil support is located in the air gap of a magnet assembly, the magnet assembly comprising pairs of flat permanent magnets whose air gaps are arranged next to each other and whose poles are so arranged that poles of unlike polarity are opposite each other, and the coil(s) being of elongate shape, the longitudinal conductors of which coil(s) are always located inside the said air gaps and the transverse conductors are always located outside said air gaps. The device of the invention can be used for all positioning operations requiring a very high degree of accuracy, in particular to position write/read devices of every kind and measuring and testing probes in control engineering and the laboratory.