Magnetic disc recording and reproducing device

Details Magnetic disc recording and reproducing device Magnetic disc recording and reproducing device

1987-11-18

1989-03-14

Tupper, Robert S.

Dynamic magnetic information storage or retrieval

Record transport with head stationary during transducing

Drum record

G11B 554, G11B 2122

Patent

active

048129330

ABSTRACT:
A magnetic disc recording and reproducing device of the type having floating type magnetic head adapted to be displaced by a drive motor, said device comprising a magnetic head automatic returning means including a pinion mounted on a shaft of the drive motor for rotation in correspondence with the displacement of the head, a magnetic head returning member disposed rotatably and adapted to disengage from the pinion at the end of a "return to zero" motion of the drive motor and engage with the pinion when the drive motor is stopped, a spring for biasing the magnetic head returning member in the direction of tending to engage with the pinion, and a lock mechanism for holding the magnetic head returning member in the condition of disengagement from the pinion at and after the end of the "return to zero" motion and for permitting the magnetic head returning member to rotate when the drive motor is stopped.

REFERENCES:
patent: 4139874 (1979-02-01), Shiraishi
patent: 4686595 (1987-08-01), Bryer
patent: 4706142 (1987-11-01), Hattori et al.
patent: 4742410 (1988-05-01), Smith
patent: 4751595 (1988-06-01), Kishi et al.

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