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Class Information
Number: 360/78.11
Name: Dynamic magnetic information storage or retrieval > Automatic control of a recorder mechanism > Controlling the head > Track changing > For rotary carrier (e.g., disc) > Including nonmagnetic position sensing
Description: Subject matter having track changing structure responsive to a signal produced in response to a property of the record carrier other than a magnetic property, or by a nonmagnetic auxiliary element.
Patents under this class:
| Patent Number |
Title Of Patent |
Date Issued |
| 7515377 |
Storage apparatus and control method for detecting vibration produced during seeking |
Apr. 7, 2009 |
| 7495857 |
Servo writing a disk drive by writing spiral tracks using a mechanical position sensor |
Feb. 24, 2009 |
| 7468858 |
Information recording apparatus |
Dec. 23, 2008 |
| 7215504 |
Disk drive using an optical sensor to detect a position of an actuator arm |
May. 8, 2007 |
| 7012777 |
Disk drive with capacitance sensing of disk vibration and feedforward control for removal of read/write head track misregistration |
Mar. 14, 2006 |
| 6977791 |
Media servowriting system |
Dec. 20, 2005 |
| 6950270 |
Adaptive index reference position qualification |
Sep. 27, 2005 |
| 6947243 |
Method and system for time-shift based rotational vibration sensing in disk drives |
Sep. 20, 2005 |
| 6924958 |
Read/write transducer for hard disk drives with optical position measuring system, and manufacturing process thereof |
Aug. 2, 2005 |
| 6920010 |
Magnetic recording apparatus |
Jul. 19, 2005 |
| 6898046 |
Method and system for rotational velocity-based algorithm for vibration compensation in disk drives |
May. 24, 2005 |
| 6856484 |
Magnetic servo of a recording head |
Feb. 15, 2005 |
| 6829118 |
Optical rotational position information detecting apparatus |
Dec. 7, 2004 |
| 6829115 |
Method and apparatus for measuring half frequency whirl in a spindle motor |
Dec. 7, 2004 |
| 6747832 |
Disk apparatus and head position control method |
Jun. 8, 2004 |
| 6735036 |
Control of data sensor fly height |
May. 11, 2004 |
| 6721113 |
Method of recognizing master disk positioning mark |
Apr. 13, 2004 |
| 6683744 |
Magnetic disk evaluation apparatus and method |
Jan. 27, 2004 |
| 6631047 |
Interference device, position detecting device, positioning device and information recording apparatus using the same |
Oct. 7, 2003 |
| 6580581 |
Recovery of lateral position of a servo system with respect to longitudinal servo bands of a magnetic tape |
Jun. 17, 2003 |
| 6549360 |
Magnetic recording medium with laser-formed servo-marks |
Apr. 15, 2003 |
| 6535347 |
Head controlling device in a disk apparatus |
Mar. 18, 2003 |
| 6504667 |
Magnetic disk unit and method of manufacture thereof |
Jan. 7, 2003 |
| 6476995 |
Method and apparatus for reducing track misregistration from servo track writing |
Nov. 5, 2002 |
| 6421195 |
Magnetic disk media with patterned sections |
Jul. 16, 2002 |
| 6414807 |
Method and apparatus for optically sensing accurate clock patterns |
Jul. 2, 2002 |
| 6407877 |
Recording/reproducing method and apparatus in which head driver is unlocked when medium is loaded and when track position information formulation based on optical signal input has been complet |
Jun. 18, 2002 |
| 6324026 |
Readable indelible mark on storage media |
Nov. 27, 2001 |
| 6307702 |
Method of writing servo tracks on magnetic disc and device for the same |
Oct. 23, 2001 |
| 6304409 |
Active damping of actuator bearing translational mode |
Oct. 16, 2001 |
| 6304404 |
Recording medium driving apparatus and tracking method |
Oct. 16, 2001 |
| 6239938 |
Multi-actuator optics drive system for laser servowriting |
May. 29, 2001 |
| 6225799 |
Method and apparatus for testing magnetic heads and hard disks |
May. 1, 2001 |
| 6191911 |
Positioning apparatus for hard disk servowriter |
Feb. 20, 2001 |
| 6128155 |
High density magnetic recording apparatus including a hologram type magnetic head positioning system |
Oct. 3, 2000 |
| 6122132 |
Disk drive head position encoder |
Sep. 19, 2000 |
| 6057976 |
Apparatus for detecting rotational displacement information of a rotating object |
May. 2, 2000 |
| 6055122 |
Magnetic recording apparatus having a reduced thickness |
Apr. 25, 2000 |
| 6034838 |
Magnetic recording/reproducing device with an improved carriage location detector |
Mar. 7, 2000 |
| 6018440 |
Flexible disk drive having a position detection unit for detecting a current position of a magnetic head |
Jan. 25, 2000 |
| 5936788 |
Method and apparatus for ramp load and unload |
Aug. 10, 1999 |
| 5872676 |
Method and apparatus for positioning a dual element magnetoresistive head using thermal signals |
Feb. 16, 1999 |
| 5831786 |
Disk drive having position sensor for ramp load and unload, and method for its use |
Nov. 3, 1998 |
| 5774295 |
Servo track writing technique |
Jun. 30, 1998 |
| 5739972 |
Method and apparatus for positioning a magnetoresistive head using thermal response to servo information on the record medium |
Apr. 14, 1998 |
| 5677805 |
Apparatus for determining the dynamic position and orientation of a transducing head relative to a storage medium |
Oct. 14, 1997 |
| 5666236 |
Velocity control for a disk drive actuator |
Sep. 9, 1997 |
| 5610777 |
Method and apparatus for writing servo tracks of a magnetic disk unit which uses a probe to control the positioning of the head |
Mar. 11, 1997 |
| 5587852 |
Disk head driving device using linear activator with multipolar magnets |
Dec. 24, 1996 |
| 5568337 |
Head positioning using a disk drive mounted to a rotating table |
Oct. 22, 1996 |
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