Dynamic information storage or retrieval – Simultaneous diverse types of storage or retrieval
Patent
1982-04-07
1987-01-27
Cardillo, Raymond F.
Dynamic information storage or retrieval
Simultaneous diverse types of storage or retrieval
360 75, 360 77, 360110, 369 43, G11B 1300, G11B 2110
Patent
active
046399062
ABSTRACT:
The lateral position of a magnetic head is controlled in response to tracking information derived from an adjacent guide track formed by a series of minute pits on a grooveless recording medium having ferromagnetic and dielectric properties. Microwave energy is applied to an electrode mounted for movement with the magnetic head to sense the variations in capacitance resulting from the geometrical variations of the minute pits. The recording medium comprises an underlying layer of ferromagnetic material in which the minute pits are formed in spiral or concentric pattern and an overlying layer of a dielectric material which conforms to the pit contours of the underlying layer.
REFERENCES:
patent: 3886052 (1975-05-01), Smith
patent: 4160268 (1979-07-01), Goto et al.
patent: 4190859 (1980-02-01), Kinjo
patent: 4322836 (1982-03-01), Kinjo et al.
patent: 4420827 (1983-12-01), Wada et al.
patent: 4448843 (1984-05-01), Yamada et al.
IBM TDB, vol. 21, No. 10, Floppy Disc Embossing For Servo Applications, Acosta et al., Mar. 1979, pp. 4259-4260.
IBM TDB, vol. 19, No. 9, Optical or Capacitive Digital Servos for Record Members, Cannon, Feb. 1977, pp. 3303-3304.
IBM TDB, vol. 21, No. 6, Nov. 1978, R. I. Potter, "Capacitive Servoing on Topographic Variations".
IBM TDB, vol. 21, No. 3, Aug. 1980, Handen et al., "Improvement in the Position Error Signal Detector Channel for a Buried Servo Recording System".
RCA TN 1210, Jul. 1978, "Microwave Apparatus to Detect Small Capacitance Changes at 2.45 GHz".
Cardillo Raymond F.
Garland Steven R.
Victor Company of Japan , Limited
LandOfFree
Magnetic recording on tracking controlled grooveless medium havi does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Magnetic recording on tracking controlled grooveless medium havi, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Magnetic recording on tracking controlled grooveless medium havi will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-862915