Dynamic magnetic information storage or retrieval – Automatic control of a recorder mechanism – Controlling the head
Patent
1990-03-26
1993-03-23
Smith, Jerry
Dynamic magnetic information storage or retrieval
Automatic control of a recorder mechanism
Controlling the head
360 7802, G11B 2102, G11B 555
Patent
active
051969696
ABSTRACT:
A serpentine magnetic tape recording/reproducing system includes a combination head (21) having a plurality of magnetic heads (W,R). A head positioning system including a head operating unit (100) in conjunction with a head moving unit (110) changes the position of each head relative to a width of the tape (23) whereby each head can traverse a plurality of tracks (T). A light emitting unit (36) is disposed at a position confronting a first side of the magnetic tape for emitting light across the width of the magnetic tape (23). A light receiving unit (33) comprising a plurality of light receiving elements (34, 35) is disposed at a position confronting a second side of the magnetic tape for receiving the light emitted from the light emitting unit (36). The plurality of light receiving units (34, 35) are so disposed that outputs from the units (34, 35) have a predetermined relation which governs feedback control including at a time when the magnetic heads are changing tracks. The light receiving units (34, 35) are particularly positioned relative to the tracks (T) and with respect to one another.
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H. Uchida et al "Stationary Head Digital Audio Tape Deck", Trans. IECE Japan, EA81-64, published on 1981.
M. Kato et al., "A Study of Stationary Head PCM Tape Recorder", Trans. IECE Japan, EA83-56, published on 1983.
T. Naitoh and H. Kyotani "Precision Machining and Mechanism", Sharp Engineering Report No. 28, pp. 7-13, published on 1984.
Iwamatsu Tadashi
Okuda Tohru
Garland Steven R.
Sharp Kabushiki Kaisha
Smith Jerry
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