Dynamic magnetic information storage or retrieval – Automatic control of a recorder mechanism – Controlling the head
Patent
1996-10-08
1998-10-20
Hindi, Nabil
Dynamic magnetic information storage or retrieval
Automatic control of a recorder mechanism
Controlling the head
360105, G11B 586
Patent
active
058255761
ABSTRACT:
An information storage unit comprises a frame (1), a magnetic information disc (9, 10), particularly a magnetic hard disc, which is rotatable about an axis of rotation (910). A magnetic head (52-55) is arranged on a pivotable support (56-59), and a lifting device lifts the magnetic head from the information disc. The lifting device comprises an electromagnetic actuator (62-65) having a first actuator part which is stationary relative to the frame and a second actuator part arranged on a movable portion (56b-59b) of the support. When the actuator is energized these actuator parts cooperate with one another via an air gap to generate a lifting force. Such an energization is effected particularly when a scanning operation is started and stopped, in order to preclude damaging of the information disc. Energization requires a comparatively small amount of energy and the measure has a favorable effect on the required starting torque.
REFERENCES:
patent: 5079652 (1992-01-01), Ishida et al.
patent: 5241438 (1993-08-01), Matsushima
patent: 5296985 (1994-03-01), Mochizuki et al.
patent: 5663846 (1997-09-01), Masuoka et al.
Hindi Nabil
U. S. Philips Corporation
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