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公开(公告)号：DE2963544D1
公开(公告)日：1982-10-07
申请号：DE2963544
申请日：1979-09-19
Applicant: IBM
Abstract: A magnetic disk file machine has a pair of opposed transducers, one transducer 150 of which is movable to engage a magnetic disk rotatably disposed in a magnetic diskette assembly in the machine against the other, a pressure plate opposed to a platen portion for holding the disk in a proper data transferring plane, and a manually operable knob 242 mechanically connected with the movable transducer and with the pressure plate for moving these parts between original positions, which are widely separated from the opposed parts to allow positioning of a magnetic diskette in the machine, and intermediate positions in which the spacing is less. The machine includes a solenoid mechanically connected with the movable transducer and with the pressure plate for moving these parts from their intermediate positions to final positions in which the movable transducer engages the disk and in which the pressure plate grips the diskette and holds the disk in a proper data transferring plane. The mechanical connections from the knob to the pressure plate and to the movable transducer include an oscillatable shaft 240 connected with the knob and having an eccentric portion 241 effective for moving these parts between original and intermediate positions. The solenoid is positioned on the other side of the machine to the oscillatable shaft, and a flexible cable 270 connected the solenoid with mechanism on the shaft side of the machine for moving the pressure plate and movable transducer between intermediate and final positions.
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公开(公告)号：DE2964491D1
公开(公告)日：1983-02-17
申请号：DE2964491
申请日：1979-09-19
Applicant: IBM
Inventor： CARLSON JOHN ARTHUR , RUSCH KENNETH DAVID , SIPPEL DAVID LESTER
IPC: G11B17/028 , A01D34/76 , G11B17/04 , G11B5/016 , G11B17/02
Abstract: Apparatus for loading a collet with respect to a rotatable drive hub of a magnetic disk drive machine for gripping a magnetic disk between the collet and drive hub including a leaf spring supported at opposite ends with respect to a machine frame and carrying the collet at an intermediate place between the ends. One of the ends of the spring is pivotally mounted on the frame, and a manually rotatable lever applies a force onto the leaf spring between its pivotal mounting and the collet so as to move the collet to engage the disk between the collet and drive hub against the resilience of the leaf spring. The leaf spring is relatively wide in its portion between its pivotal mounting and the collet and is relatively narrow between the collet and its other end so that the narrow portion of the spring bends the wide portion of the spring as the collet is moved toward the hub whereby the collet uniformly grips the disk with respect to the hub and whereby the longitudinal center of the collet remains nearly coincident with the longitudinal center of the hub as the collet completes its disk engaging movement with respect to the hub to avoid side thrust on the disk.
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