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    HIGH DENSITY DISC DRIVE WITH MAGNETIC CLUTCH AND A REMOVABLE CARTRIDGE
    41.
    发明专利
    HIGH DENSITY DISC DRIVE WITH MAGNETIC CLUTCH AND A REMOVABLE CARTRIDGE 未知

    公开(公告)号：AU4667789A

    公开(公告)日：1990-06-12

    申请号：AU4667789

    申请日：1989-10-03

    Applicant: SYQUEST TECHNOLOGY

    Inventor： IFTIKAR SYED H ,  MANDISH JOHN J

    IPC: G11B17/03 ,  G11B17/04 ,  G11B19/20 ,  G11B21/00 ,  G11B23/03 ,  G11B23/50 ,  G11B25/04 ,  G11B33/12 ,  G11B5/016

    Abstract: A disc drive (20) including a spindle motor assembly (42) having a magnetic clutch plate (46) and an actuator (47) receives a hermetically sealed cartridge (22) containing a plurality of discs (72, 74) with associated heads (80, 81) mounted in the cartridge (22). Associated with an arm assembly (84) which supports heads (80, 81) is a component (50) for use with the actuator (47). With the cartridge (22) inserted in the drive (20), the actuator (47) operates to cause the heads (80, 81) to traverse relative to the disc (72, 74) as the spindle motor assembly (42) uses a magnetic field to engage a magnetic plate (77) associated with cartridge (22) in order to spin the disc (72, 74). Data transfer connectors (52, 54) are associated with both the drive (20) and the cartridge (22) in order to allow for the transfer of data between the cartridge (22) and the drive (20).

    HIGH DENSITY DISK DRIVE WITH MAGNETIC CLUTCH AND A REMOVABLE CARTRIDGE
    42.
    发明专利
    HIGH DENSITY DISK DRIVE WITH MAGNETIC CLUTCH AND A REMOVABLE CARTRIDGE 未知

    公开(公告)号：CA2000477A1

    公开(公告)日：1990-05-14

    申请号：CA2000477

    申请日：1989-10-11

    Applicant: SYQUEST TECHNOLOGY

    Inventor： IFTIKAR SYED H ,  MANDISH JOHN J

    IPC: G11B17/03 ,  G11B17/04 ,  G11B19/20 ,  G11B21/00 ,  G11B23/03 ,  G11B23/50 ,  G11B25/04 ,  G11B33/12 ,  G11B17/028

    Abstract: HIGH DENSITY DISC DRIVE WITH MAGNETIC CLUTCH AND A REMOVABLE CARTRIDGE A disc drive 20 including a spindle motor assembly 42 having a magnetic clutch plate 46 and an actuator 47 receives a hermetically sealed cartridge 22 containing a plurality of discs 72, 74 with associated heads 80, 81 mounted in the cartridge 22. Associated with an arm assembly 84 which supports heads 80, 81 is a component 50 for use with the actuator 47. With the cartridge 22 inserted in the drive 20, the actuator 47 operates to a cause the heads 80, 81 to traverse relative to the discs 72, 74 as the spindle motor assembly 42 uses a magnetic field to engage a magnetic plate 77 associated with cartridge 22 in order to spin the discs 72, 74. Data transfer connectors 52, 54 axe associated with both the drive 20 and the cartridge 22 in order to allow for the transfer of data between the cartridge 22 and the drive 20. WP1/SRM/SYQU/6400-6415.1 (PCT Appln. 9/14/89)

    46.
    发明专利
    未知

    公开(公告)号：FR2733078A1

    公开(公告)日：1996-10-18

    申请号：FR9602951

    申请日：1996-03-08

    Applicant: SYQUEST TECHNOLOGY

    Inventor： SUN KAI CHIH KAI ,  HERBST JAMES A ,  KIADEH MANSUR B ,  CHANG CHIH HSIUNG

    IPC: G11B5/012 ,  G11B5/02 ,  G11B5/024 ,  G11B5/48 ,  G11B5/55 ,  G11B5/596 ,  G11B19/00 ,  G11B19/02 ,  G11B19/12 ,  G11B23/03 ,  G11B25/04 ,  G11B20/00

    Abstract: A higher-capacity disk drive system and a higher-capacity removable disk cartridge adapted for downward compatibility with older, lower-capacity disk drive systems, wherein a unique control information format is stored on higher-capacity removable disk cartridges to distinguish them from older, lower-capacity removable disk cartridges and thereby to facilitate cartridge capacity recognition by the higher-capacity disk drive system. Upon recognizing the capacity of an inserted removable disk cartridge, the higher-capacity disk drive system can read and write data to the removable disk cartridge such that data which it stores on a lower-capacity removable disk cartridge may be read by lower-capacity disk drive systems.

    47.
    发明专利
    未知

    公开(公告)号：FR2729496A1

    公开(公告)日：1996-07-19

    申请号：FR9600429

    申请日：1996-01-16

    Applicant: SYQUEST TECHNOLOGY

    Inventor： DROUIN DAVID M

    IPC: G11B21/08 ,  G11B5/012 ,  G11B15/467 ,  G11B19/02 ,  G11B27/11 ,  G11B27/34 ,  G11B27/36 ,  G11B33/10

    Abstract: A disk drive employing a voice coil actuator to position a read/write head over a magnetic disk retracts the read/write head from the magnetic disk surface and passes an audio frequency alternating current through the voice coil to produce a corresponding movement in the read/write head support structure which generates an audible tone indicating the disk drive status. The alternating current waveform has a positive phase and a negative phase, with the read/write head moving toward the disk in response to one phase of the current and the read/write head moving away from the disk in response to the other phase. Audible tones of different frequencies are produced by varying the frequency of the alternating current waveform. In this fashion the disk drive generates a predetermined sequence of tones separated by silent pauses which identifies a particular disk drive status condition.

    49.
    发明专利
    未知

    公开(公告)号：DE19527520A1

    公开(公告)日：1996-02-01

    申请号：DE19527520

    申请日：1995-07-27

    Applicant: SYQUEST TECHNOLOGY

    Inventor： SUN KAI CHIH-KAI ,  THORSEN JACK DUANE ,  POLLOCK DUNCAN LEE ,  LOW YEE CHEOK ,  CHOO YIN YEOW ,  LIM KIAN KOK

    IPC: G11B21/22 ,  G11B5/54 ,  G11B21/12

    Abstract: A single mechanism is used to launch and retract the read-write heads from the medium of a disk drive. The mechanism includes a retraction lever 91, a retraction lever lock 118, a mechanical biasing member 76, a disk 37, and a voice coil motor 16. During launch of the read-write heads, the mechanical basing member 76 balances the emf generated by the voice coil motor 16. After launch, the voice coil motor is used to rotate a retraction lever 91 and increase the potential energy in the mechanical biasing member 76. The retraction lever lock 118 then is used to store this built-up potential energy. If the drive later experiences a loss of power, the mechanism automatically retracts the read-write heads from the media. During retraction of the read-write heads, the stored mechanical energy is applied to the retraction lever 91, which then automatically retracts the read-write heads. In the preferred embodiment, the disk is contained within a cartridge.

    Method and apparatus for launching and retracting read-write heads from the medium of a disk drive
    50.
    发明专利
    Method and apparatus for launching and retracting read-write heads from the medium of a disk drive 未知

    公开(公告)号：GB9514828D0

    公开(公告)日：1995-09-20

    申请号：GB9514828

    申请日：1995-07-19

    Applicant: SYQUEST TECHNOLOGY

    IPC: G11B21/22 ,  G11B5/54 ,  G11B21/12

    Abstract: PROBLEM TO BE SOLVED: To minimize clash between a read/write head and a recordign medium, and thereby to improve the reliability of a disk drive by employing one mechanism for launching/retraction of the read/write head. SOLUTION: The mechanism includes a retract lever 81, a retract lever lock 118, a mechanical biasing member (spring 76 or the like), and a voice coil motor 16. After launching, the voice coil motor 16 is used to rotate the retract lever 91 to increase the potential energy of the biasing member. Then the retract lever lock 118 is used to store the built-up potential energy. On the occurrence of a power failure of the disk drive, the mechanism retracts the read/write heads 55, 58 automatically from the medium. The stored mechanical energy during the retract motion of the read/write heads 55, 58 acts on the retract lever 91 to allow the read/write heads 55, 58 automatically to be retracted from the medium.

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