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Class Information
Number: 360/77.02
Name: Dynamic magnetic information storage or retrieval > Automatic control of a recorder mechanism > Controlling the head > Track centering > Rotary carrier
Description: Subject matter which controls a transducer centering position relative to a circular revolving medium.

Sub-classes under this class:

Class Number Class Name Patents
360/77.04 By memory storage of repeatable error or correction 625
360/77.03 By nonmagnetic sensing (e.g., optical, capacitive) 253
360/77.05 By servo signal component from carrier surface separate from information signal bearing surface 199
360/77.07 By tracking signal recorded on or immediately beneath surface 234
360/77.06 Reproduced data signal used for tracking 198

Patents under this class:
1 2 3 4 5 6 7 8 9 10 11 12 13 14

Patent Number Title Of Patent Date Issued
4326226 Constant bandwidth automatic gain control Apr. 20, 1982
4321636 Cateye-signal intercept detector for aligning a read-write head above a computer data storage disk Mar. 23, 1982
4318144 Flexible magnetic disk recording apparatus Mar. 2, 1982
4310914 Skipper-assisted active search Jan. 12, 1982
4310912 Servo system for recording and/or reproducing apparatus using a rotatable recording carrier Jan. 12, 1982
4291346 Optoelectronic system for determining the position of a magnetic head transducer on a flexible magnetic recording disc Sep. 22, 1981
4280024 Selectively damped video disc stylus assembly Jul. 21, 1981
4271442 Plane magnetic recording medium Jun. 2, 1981
4253126 Linear tracking arm assembly Feb. 24, 1981
4238809 Servo track configuration for magnetic disk apparatus Dec. 9, 1980
4223359 Flexible magnetic disk recording apparatus Sep. 16, 1980
4194226 Rigid magnetic disc memory apparatus including open loop stepper-motor-driven read/write head Mar. 18, 1980
4169276 Drive circuit for controlling a movable magnetic head Sep. 25, 1979
4164764 Magnetic head position reference system Aug. 14, 1979
4160268 Signal pickup device with tracking control and jitter compensation for a video disc Jul. 3, 1979
4149200 Transducer positioning system Apr. 10, 1979
RE29963 Servo system for reading from a disc-shaped record carrier containing signals coded in optical form Apr. 10, 1979
4131924 Flexure mounted magnetic head positioner for high-speed translation Dec. 26, 1978
4130844 Method and means for tracking magnetic tracks Dec. 19, 1978
4115823 Track following servosystem for data storage apparatus Sep. 19, 1978
4092683 Dual-mode demodulator for movement of a servo head May. 30, 1978
4092682 Cross coupled demodulator for generating a servo head position error signal May. 30, 1978
4087842 Recording track eccentricity compensation method and means May. 2, 1978
4085427 Transducer positioning system Apr. 18, 1978
4084201 Magnetic disc, especially a flexible magnetic disc, for track adjustment and amplitude control Apr. 11, 1978
4075667 Method and apparatus for aligning read/write heads in a disc recorder Feb. 21, 1978
4072990 Servo positioning system for data storage apparatus Feb. 7, 1978
4056831 Thermal compensation for disk pack systems Nov. 1, 1977
4053937 Calibration timing bands Oct. 11, 1977
4012777 Record carrier and device for playing back same Mar. 15, 1977
3994016 Head positioning servo system for disk drives Nov. 23, 1976
3969574 Tubular player arm for an optical recording and reproducing device with drive coil and tachogenerator coil on other end Jul. 13, 1976
3962724 Method of and device for testing movable magnetic heads for ability to trace a predetermined spiral magnetic track without deviating therefrom Jun. 8, 1976
3959820 System for increasing the number of data tracks in a magnetic recording system May. 25, 1976
3953889 Electronic head adjust system for removable magnetic discs Apr. 27, 1976

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