Apparatus for repositioning a transducer in the absence of elect

Details Apparatus for repositioning a transducer in the absence of elect Apparatus for repositioning a transducer in the absence of elect

1985-10-17

1987-08-11

Wolff, John H.

Dynamic magnetic information storage or retrieval

Record transport with head stationary during transducing

Drum record

360105, 360107, 360 97, 369244, G11B 555, G11B 2108, G11B 554, G11B 2122

Patent

active

046865950

ABSTRACT:
A disk drive system includes a mechanism for positioning a movable transducer member in the absence of electrical power to the drive system. The mechanism includes a ferromagnetic lever arm pivotably positioned to engage a movable transducer member and, by such engagement, to move the transducer to a predetermined location. An electromagnet attracts the lever arm to a position clear of the movable transducer member in the presence of electrical power to the drive system, and a spring moves the lever arm into engagement with the movable transducer member when the electromagnet is not energized.

REFERENCES:
patent: 4131921 (1978-12-01), Gruczelak
patent: 4139874 (1979-02-01), Shiraishi
patent: 4218714 (1980-08-01), Isozaki et al.
patent: 4331989 (1982-05-01), Viskochil
patent: 4359762 (1982-11-01), Stollorz
patent: 4484241 (1984-11-01), Brende et al.
patent: 4538193 (1985-08-01), Dimmick et al.
patent: 4562500 (1985-12-01), Bygdnes
patent: 4574372 (1986-03-01), d'Alayer de Costemore d'Arc
patent: 4594627 (1986-06-01), Viskochil et al.
IBM Technical Disclosure Bulletin, vol. 19, No. 4, Sep. 76, Hearn, "Actuator Retraction Device", p. 1440.
IBM Technical Disclosure Bulletin, vol. 26, No. 3B, Aug. 83, Brende et al., "Magnetic Home Latch Assembly", pp. 1693-1694.

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