G - Physics – 11 – B
Patent
G - Physics
11
B
310/54, 352/21.3
G11B 17/00 (2006.01) G11B 5/55 (2006.01) G11B 5/596 (2006.01) H02K 41/035 (2006.01) H02P 25/02 (2006.01)
Patent
CA 1085901
ABSTRACT OF THE DISCLOSURE An electromagnetic induction actuator for the trans- ducer arm of a magnetic disc file is described which provides faster operation without increase in input power as compared to present voice coil actuators. The actuator consists of a trans- former having a fixed primary winding on a magnetic core. An angularly movable coil is linked with the magnetic core forming a secondary winding of the transformer. A permanent magnet generates a static magnetic field which is coupled to the coil. One or more transducer arms capable of angular movement are 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 angular movement of the coil and attached arm.
290828
Gowling Lafleur Henderson Llp
International Business Machines Corporation
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