公开(公告)号：US3900782A

公开(公告)日：1975-08-19

申请号：US48969274

申请日：1974-07-18

Applicant: BASF AG

Inventor： HAMMERSCHMITT PETER

IPC: G11B21/10 ,  G11B5/596 ,  G05D23/275

CPC classification number: G11B5/59627

Abstract: An improved means for compensating for temperature variations in a magnetic disc drive system in which a magnetic disc is rotated on a spindle and a magnetic head is movable radially across the surface of the disc by means of a head support displaceable on a base plate, the head and head support being positioned by a positioning means. A first temperature value is detected near the magnetic head and disc and a second temperature value is detected near the base plate and the positioning means. The differential between the first and second temperature values is obtained in the form of a first voltage signal and the differential between a constant reference temperature and the first temperature value is obtained in the form of a second voltage signal. The two voltage signals are summed to provide a correcting signal to the positioning means.

公开(公告)号：JPS51128509A

公开(公告)日：1976-11-09

申请号：JP7278475

申请日：1975-06-17

Applicant: BASF AG

Inventor： HAMMERSCHMITT PETER

IPC: G11B21/10 ,  G11B5/596

公开(公告)号：DE58907173D1

公开(公告)日：1994-04-14

申请号：DE58907173

申请日：1989-10-19

Applicant: BASF AG

Inventor： HACK JOACHIM ,  GRAU WERNER DR ,  SICKMUELLER WERNER ,  MANNSPERGER HEINRICH DR ,  JAKUSCH HELMUT DR ,  SCHOMANN KLAUS DIETER DR ,  HAMMERSCHMITT PETER ,  BROSIUS SIBYLLE DR ,  FEUERHERD KARL-HEINZ DR ,  ALBERT BERNHARD DR ,  SCHMITT MICHAEL DR ,  ACKER MICHAEL DR

IPC: G11B5/41 ,  G11B5/54 ,  G11B7/005 ,  G11B11/105 ,  G11B19/04 ,  G11B19/06 ,  G11B33/14

公开(公告)号：AU3634478A

公开(公告)日：1979-11-29

申请号：AU3634478

申请日：1978-05-22

Applicant: BASF AG

Inventor： MANZKE KLAUS ,  HAMMERSCHMITT PETER ,  UHL KARL

IPC: G11B5/48 ,  G11B5/12 ,  G11B5/30

公开(公告)号：DE3933212A1

公开(公告)日：1991-04-11

申请号：DE3933212

申请日：1989-10-05

Applicant: BASF AG

Inventor： SCHOMANN KLAUS DIETER DR ,  HAMMERSCHMITT PETER ,  BROSIUS SIBYLLE DR ,  FEUERHERD KARL-HEINZ DR ,  ALBERT BERNHARD DR ,  SCHMITT MICHAEL DR ,  ACKER MICHAEL DR

IPC: G11B5/41 ,  G11B5/54 ,  G11B7/00 ,  G11B7/004 ,  G11B7/005 ,  G11B7/085 ,  G11B11/105 ,  G11B19/04 ,  G11B19/06 ,  G11B33/14

Abstract: Moving laser beams from useful tracks to alternative positions in devices in which information is stored optically or magneto-optically. This results in higher signal-to-noise ratios.

公开(公告)号：AT39304T

公开(公告)日：1988-12-15

申请号：AT84105477

申请日：1984-05-14

Applicant: BASF AG

Inventor： MANZKE KLAUS ,  HAMMERSCHMITT PETER ,  SCHNEIDER RICHARD DR

IPC: G11B21/02 ,  G11B5/55 ,  H01F7/14

公开(公告)号：DE2520634A1

公开(公告)日：1976-01-29

申请号：DE2520634

申请日：1975-05-09

Applicant: BASF AG

Inventor： HAMMERSCHMITT PETER

IPC: G11B21/10 ,  G11B5/596 ,  G11B5/55

公开(公告)号：DE3475667D1

公开(公告)日：1989-01-19

申请号：DE3475667

申请日：1984-05-14

Applicant: BASF AG

Inventor： MANZKE KLAUS ,  HAMMERSCHMITT PETER ,  SCHNEIDER RICHARD DR

IPC: G11B21/02 ,  G11B5/55 ,  H01F7/14