Bistable magnetic head advancing/retracting device for rotating

Details Bistable magnetic head advancing/retracting device for rotating Bistable magnetic head advancing/retracting device for rotating

1991-08-15

1993-02-23

Smith, Jerry

Dynamic magnetic information storage or retrieval

Automatic control of a recorder mechanism

Controlling the head

360105, G11B 554

Patent

active

051895706

ABSTRACT:
A magnetic head advancing apparatus which advances a magnetic head to be brought into contact with a magnetic recording medium (head loading) in response to a latch-type solenoid when a power supply switch is closed. The magnetic head is separated from the magnetic recording medium (head unloading) in response to a latch-type solenoid when the power supply switch is opened, when the power supply voltage drops below a predetermined level, or when the power supply (a battery) is ejected from the apparatus. This makes it possible to prevent local permanent deformation of a magnetic disk caused by prolonged abutting contact between the magnetic head and the magnetic disk.

REFERENCES:
patent: 4012791 (1977-03-01), Bleiman
patent: 4120010 (1978-10-01), Mitsuya et al.
patent: 4689698 (1987-08-01), Ishikawa et al.
patent: 4786995 (1988-11-01), Stupeck et al.
patent: 4835642 (1989-05-01), Furukawa et al.
patent: 4841397 (1989-06-01), Maeda

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