Magnetic head pivotal support with compact drive means

Details Magnetic head pivotal support with compact drive means Magnetic head pivotal support with compact drive means

1978-05-17

1980-04-01

Wolff, John H.

Dynamic magnetic information storage or retrieval

Record transport with head stationary during transducing

Drum record

G11B 2102

Patent

active

041964560

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.

REFERENCES:
patent: 3849800 (1974-11-01), Cuzner et al.
patent: 4150407 (1979-04-01), Dijkstra
I.B.M./T.D.B. vol. 17, No. 10, Mar. 1975, pp. 3016-3017, "Disk File Actuator" by Lissner et al.
I.B.M./T.D.B. vol. 16, No. 10, Mar. 1974, p. 3385, "Recording and/or Reproducing Head Assembly" by Cuzner et al.
I.B.M./T.D.B. vol. 19, No. 4, Sep. 1976, p. 1440, "Actuator Retaction Device" by Hearn.
IBM Journal of Research & Development vol. 20, No. 4, pp. 389-397, Jul. 1976, Design for Swinging Arm Actuator*** by Health.

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