Patent
Automatic scan tracking using an additional sensing means on a bimorph
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TLDR
A magnetic head supported for scanning along tracks of a magnetic medium is mounted on a piezoelectric bender element for movement laterally relative to the tracks as they are scanned as mentioned in this paper.Abstract:
A magnetic head supported for scanning along tracks of a magnetic medium is mounted on a piezoelectric bender element for movement laterally relative to the tracks as they are scanned As the head scans a track, the relative position between the track to be reproduced and the head is sensed to determine the tracking position of the heads A bias control signal is generated by a servo circuit and applied to energize the piezoelectric bender element to position the head relative to the track to maintain the head in the desired tracking position as it scans the magnetic mediumread more
Citations
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Patent
Mechanisms for a closed loop head positioner for streaming tape drives
Ashok B. Nayak,Donald Schilling +1 more
TL;DR: In this article, the magnetic tape head is secured between the reed beam and the bender beam at a location generally between their ends, and a voice coil linear motor is used to move the tape head along the path transverse to the tape travel direction.
Patent
Rotary head assembly
TL;DR: In this article, a plurality of rotary magnetic heads are aligned substantially in the scanning direction on a single head base plate to form parallel skewed parallel tracks without guardbands therebetween, and an azimuth recording technique is intro-duced to avoid crosstalk between adjacent channels during reproduction.
Patent
Tracking servo system for disc memory
TL;DR: In this paper, a servo system for positioning a data transducer head relative to a plurality of substantially concentric data tracks on the surface of a magnetic disc including a pair of servo transducers heads for sensing the data tracks and generating output signals representative of a data signal written on the sensed track is presented.
Patent
Fixture and nonrepeatable error compensation system
TL;DR: In this article, a reference disc and a reference sensor are provided for measuring the non-repeatable departure from ideal so that the measured data can be compensated thereby in real time for the error thereby improving the accuracy of measured data.
Patent
System for transmitting signals via a record carrier in the form of a tape
TL;DR: In this article, a helical-scan recorder for two-channel digital video recording comprises two pairs of write-read heads which are situated diametrically opposite each other, and it is proposed to record tracking, signals of different frequencies with one head of each of said pairs of heads and to read said tracking signals during recording via crosstalk, each time using the other head of the other heads of each pair of heads.
References
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Patent
Piezoelectric transducer assembly for positioning a magnetic record/reproduce head
James P Corbett,Giacomo Vargiu +1 more
Patent
Time base error correction system and method
TL;DR: In this paper, a time base error correction system for transducing signals relative to a magnetic record medium is proposed, where a magnetic transducer cooperates with the medium to sense these signals to provide a first train of electric signals.
Patent
Servo for video tape apparatus with editing capabilities
TL;DR: In this article, a system for a video tape recorder produces reliable video tape assemble edits with no significant time base error by employing digital techniques in the phase control of the head drum and capstan servos.