Electromagnetic actuator

Details Electromagnetic actuator Electromagnetic actuator

1977-10-11

1979-03-20

Wolff, John H.

Dynamic magnetic information storage or retrieval

Record transport with head stationary during transducing

Drum record

335223, 310 36, G11B 1700

Patent

active

041457250

ABSTRACT:
An actuator comprising a transformer having a fixed primary winding on a magnetic core and a pivotally movable coil linked with the magnetic core and forming a secondary winding of the transformer. A permanent magnet generates a static magnetic field in which the coil is disposed. A transducer arm capable of pivotal movement is attached to the coil. When a current pulse is applied to the primary winding, a current is induced in the coil which reacts with the static magnetic field to cause pivotal movement of the coil and attached arm.

REFERENCES:
patent: 3849800 (1974-11-01), Cuzner et al.
I.B.M./T.D.B. vol. 16, No. 10, Mar. 1974, by D. Cuzner et al., "Recording and/or Reproducing Head Ass'y.", p. 3385

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