公开(公告)号：DE3577489D1

公开(公告)日：1990-06-07

申请号：DE3577489

申请日：1985-02-22

Applicant: IBM

Inventor： COLLINS DAVID WHINERY ,  JOHNSON JOEL SWENUM ,  SCHMIDT LAURENCE JOSEPH ,  SIVERLING MICHAEL MC HUGH ,  WENTINK WILLIAM STEWART

IPC: G11B21/02 ,  G01B11/00 ,  G11B5/455 ,  G11B5/48 ,  G11B5/56 ,  G11B33/10

Abstract: An optical tool (9) is disclosed which permits a sequence of aligned transducer gaps to be positioned parallel to the axis of a disk file. The tool is surfaced with transparent material (16, 17, 18), has a thickness the same as the disk or disks of a disk stack being simulated and presents an etched alignment grid (17) at the interface surface between transducer and tool. The virtually common plane of the transducer gap and etched grid substantially eliminates parallax and the unfilled etched grid permits the gap to be seen, whether aligned with the transparent unetched surface or the translucent etched surface portion. The use of inclined mirrored surfaces (16) underlying the grid permits alignment to be effected using a bright field microscope and observing from a direction rotated 90 degrees from a line perpendicular to the grid to enable alignment of transducer gaps confronting one another at opposite sides of the disk.

公开(公告)号：CH597668A5

公开(公告)日：1978-04-14

申请号：CH50576

申请日：1976-01-16

Applicant: IBM

Inventor： CASTRODALE DANIEL OWEN ,  STEELE STEVEN GARY ,  WENTINK WILLIAM STEWART ,  WHEELER STEPHEN EDWARD

IPC: G11B21/12 ,  G11B5/54 ,  G11B5/55 ,  G11B5/58

Abstract: Magnetic disk recording apparatus including a pair of magnetic transducers contacting the opposite sides of a magnetic disk and each carried by a swingable arm. The arms are interconnected together so that the swinging movement of one of the arms is transmitted to the other arm to cause an opposite swinging movement of the other arm for simultaneously moving the transducers away from the magnetic disk. An electromagnet actuates one of the arms so as to thereby also move the other arm.

公开(公告)号：DE2614908A1

公开(公告)日：1976-10-28

申请号：DE2614908

申请日：1976-04-07

Applicant: IBM

Inventor： CASTRODALE DANIEL OWEN ,  PENDY JUN WILLIAM JOHN ,  WENTINK WILLIAM STEWART

IPC: G11B5/49 ,  G11B5/55 ,  G11B17/32 ,  G11B17/34 ,  G11B21/20 ,  G11B5/54 ,  G11B5/016 ,  G11B21/02

公开(公告)号：DE2602446A1

公开(公告)日：1976-08-05

申请号：DE2602446

申请日：1976-01-23

Applicant: IBM

Inventor： CASTRODALE DANIEL OWEN ,  STEELE STEVEN GARY ,  WENTINK WILLIAM STEWART ,  WHEELER STEPHEN EDWARD

IPC: G11B21/12 ,  G11B5/54 ,  G11B5/55 ,  G11B21/02 ,  G11B5/016

Abstract: Magnetic disk recording apparatus including a pair of magnetic transducers contacting the opposite sides of a magnetic disk and each carried by a swingable arm. The arms are interconnected together so that the swinging movement of one of the arms is transmitted to the other arm to cause an opposite swinging movement of the other arm for simultaneously moving the transducers away from the magnetic disk. An electromagnet actuates one of the arms so as to thereby also move the other arm.