Antonelli, Terry & Wands
Magnetic shield for rotary actuator in a magnetic disc device
 A rotary actuator for a magnetic disc device for swinging a head arm to position a magnetic head mounted at an end of the head arm to a desired track of a magnetic disc is disclosed. Magnetic shield plates are provided to a magnetic circuit assembly which forms a voice coil motor together with a moving coil mounted at a rear end of a head carriage which supports the head arm in order to prevent leakage magnetic fluxes created in the vicinity of a permanent magnet of the magnetic circuit assembly from reaching the magnetic head. 
Hitachi, Ltd. Hitachi Electronics Engineering Co., Ltd.
G H G
G11B H02K G11B
inventional inventional inventional
Junichi Hatsuo
Hibino Takahashi