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    21.
    发明专利
    未知

    公开(公告)号：BR8605304A

    公开(公告)日：1987-07-28

    申请号：BR8605304

    申请日：1986-10-29

    Applicant: IBM

    Inventor： CASTLE FRANK ERIC ,  HATCHETT COLIN PETER ,  HATCHETT MICHAEL ROBERT ,  HEATH JOHN STEWART

    IPC: G11B17/038 ,  G11B21/02 ,  G11B25/04 ,  G11B33/14 ,  G11B17/08

    Abstract: A disk file comprises a disk stack subassembly (10) and a head positioning actuator (50) each mounted on opposite sides of a central box frame (81). The disk stack subassembly (10) has a non-rotating central spindle (11) and an in-hub electric motor (30) whose stator (32) is mounted on the spindle (11). The rotor (31) of the motor (30) is mounted internally of a hub (15) supported for rotation about the spindle by two bearings (16, 17) at opposite ends of the spindle (11). A stack of disks (18) is mounted externally on the hub (15). The box frame (81) is open to one side and the opposite ends of the stationary spindle (11) are located and fixed in the frame (81) so that the disk stack subassembly (10) spans the open side. Because of the symmetry and rigidity of the design, susceptibility to thermal or vibration induced misregistration is reduced. Finally a cover (90) completes the enclosure.

    PRINT HEAD ASSEMBLY FOR NON-IMPACT PRINTING
    22.
    发明专利
    PRINT HEAD ASSEMBLY FOR NON-IMPACT PRINTING 未知

    公开(公告)号：DE3273442D1

    公开(公告)日：1986-10-30

    申请号：DE3273442

    申请日：1982-06-30

    Applicant: IBM

    Inventor： HEATH JOHN STEWART

    IPC: B41J2/32 ,  B41J1/00 ,  B41J2/335 ,  B41J2/35 ,  B41J3/20

    Abstract: A print head assembly with interchangeable pluggable printed circuit print heads has means for automatically positioning a head during insertion with the aim of ensuring registration of printed circuit electrodes on the head with correspondingly positioned conductors on a body portion. The print heads are supplied as a variety of types all of which are interchangeable as a simple push-fit in the body portion. A clamp ensures that ohmic contact is established and maintained between the registering electrodes and conductors. Each head is also provided with a pattern of electrodes which serve to identify the head type. The pattern bridges selected additional conductors on the body portion and provides a decodable pattern of signals in response to an interrogate signal unique to heads of that type. One of these electrodes on the head shorts a control conductor on the body portion to one or other of two adjacent guard conductors, if lateral misregistration of the head within the recess exceeds a predetermined amount.

    PRINT MECHANISM FOR USE IN PRINTING APPARATUS AND PRINTING APPARATUS INCLUDING SUCH MECHANISMS
    25.
    发明专利
    PRINT MECHANISM FOR USE IN PRINTING APPARATUS AND PRINTING APPARATUS INCLUDING SUCH MECHANISMS 未知

    公开(公告)号：DE2962274D1

    公开(公告)日：1982-04-15

    申请号：DE2962274

    申请日：1979-06-01

    Applicant: IBM

    Inventor： HEATH JOHN STEWART

    IPC: H01F7/14 ,  B41J2/25 ,  B41J2/29 ,  B41J3/12

    Abstract: A mechanism for a matrix printer has a robust single turn closed loop transformer secondary winding (3) as the moving part for driving a print stylus (9) into and out of a print position. Each secondary winding (3) threads a transformer core (1) on which is wound a multiturn primary winding (2). A stack of such secondary windings (3), arranged with print styli (9) in a closely spaced print row across the stack are supported in a static magnetic field produced by a magnetic assembly (10). Energisation of a primary winding (2) induces a large current flow in its secondary winding (3) which reacts with the field to drive the associated print stylus (9) into the print position. In one embodiment, the stack of secondary windings (3) are all mounted on a single pivot (6) and each swings about the pivot (6) as a whole upon energisation of its associated primary winding (2). In another embodiment each secondary loop of the stack is formed so as to be elastically deformable whereby a portion of the loop carrying the stylus is deflected into the print position upon energisation of its associated primary winding.

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