公开(公告)号：CA1064609A

公开(公告)日：1979-10-16

申请号：CA218274

申请日：1975-01-17

Applicant: IBM

Inventor： ARTER NELSON K ,  EICHHORN THOMAS F ,  KALTHOFF CLEMENT H

IPC: G11B15/087 ,  G05D13/62 ,  G11B5/008 ,  G11B5/09 ,  G11B5/588 ,  G11B15/467 ,  G11B15/60 ,  G11B15/61 ,  G11B20/00 ,  G11B20/12 ,  G11B23/30 ,  G11B23/36 ,  G11B27/00 ,  G11B27/10 ,  G11B27/13 ,  G11B27/30 ,  G11B27/32 ,  G11B27/36 ,  G11B5/78 ,  G11B21/04

Abstract: MAGNETIC RECORD MEMBER FOR USE WITH ROTATING HEAD MAGNETIC RECORDING APPARATUS An elongated magnetic tape has a pair of longitudinally extending servo track areas, one of which is closer to the longitudinal center of the tape than the other. The lateral space intermediate the servo areas receives data signals, while the space between said one servo area and one edge contains identification and address signals. The tape is particularly adapted for use with rotating head recorders having two gaps on the rotor, with an intergap distance slightly greater than the lateral extent of the servo areas. A recording or write gap precedes an immediately trailing reading or recovery gap. When the rotor gaps pass the one edge in the one servo area, the write gap senses the servo track; while the read gap senses the identification signals. The arrangement is such that prior to the time the write gap reaches the data recording area, the read gap has sensed the identification signals. In a similar manner, when the gaps are leaving the data signal area, the write gap is sensing the other servo area; while the read gap is still sensing data. The longitudinal extent of the servo areas indicates, respectively, beginning of tape (BOT) and end of tape (EOT). A leader portion includes a magnetic coating for facilitating calibrating magnetic recording apparatus to each particular article.

公开(公告)号：CA1096037A

公开(公告)日：1981-02-17

申请号：CA277576

申请日：1977-05-02

Applicant: IBM

Inventor： ARTER NELSON K ,  EICHHORN THOMAS F ,  JACKSON HOWARD C

IPC: H04N5/7826 ,  G05D3/12 ,  G05D13/62 ,  G11B5/588 ,  G11B15/087 ,  G11B15/467 ,  G11B15/60 ,  G11B20/20 ,  G11B21/10

Abstract: In a magnetic recording device skew between data tracks, recorded on a length of magnetic media, and a magnetic transducer is corrected dynamically by a close loop controlled servo system. When the magnetic transducer is not in transducing relationship with the magnetic media, an offset number is placed into a stop/lock counting means. The stop/lock counting means is one of the elements which is positioned in the close loop of the servo system. The stop/ lock counting means outputs a series of pulses as the offset number is decremented. The pulses are converted to analog voltages which, in turn, energize a motor which rotates a take-up spool (capstan) on which the media is wound passing said magnetic transducer. Due to the translation of said media, whenever the count in the stop/lock counting means is zero, the magnetic transducer is positioned in registry with the selected data track on the magnetic media. BO976007

公开(公告)号：CA1066406A

公开(公告)日：1979-11-13

申请号：CA296335

申请日：1978-02-06

Applicant: IBM

Inventor： ARTER NELSON K ,  EICHHORN THOMAS F ,  KALTHOFF CLEMENT H

IPC: G11B5/78 ,  G11B21/04 ,  G11B23/36

Abstract: MAGNETIC RECORD MEMBER FOR USE WITH ROTATING HEAD MAGNETIC RECORDING APPARATUS An elongated magnetic tape has a pair of longitudinally extending servo track areas, one of which is closer to the longitudinal center of the tape than the other. The lateral space intermediate the servo areas receives data signals, while the space between said one servo area and one edge contains identification and address signals. The tape is particularly adapted for use with rotating head recorders having two gaps on the rotor, with an intergap distance slightly greater than the lateral extent of the servo areas. A recording or write gap precedes an immediately trailing reading or recovery gap. When the rotor gaps pass the one edge in the one servo area, the write gap senses the servo track; while the read gap senses the identification signals. The arrangement is such that prior to the time the write gap reaches the data recording area, the read gap has sensed the identification signals. In a similar manner, when the gaps are leaving the data signal area, the write gap is sensing the other servo area; while the read gap is still sensing data. The longitudinal extent of the servo areas indicates, respectively, beginning of tape (BOT) and end of tape (EOT). A leader portion includes a magnetic coating for facilitating calibrating magnetic recording apparatus to each particular article.