Dynamic magnetic information storage or retrieval – General recording or reproducing – Recording-or erasing-prevention
Patent
1979-09-19
1981-04-21
Canney, Vincent P.
Dynamic magnetic information storage or retrieval
General recording or reproducing
Recording-or erasing-prevention
360 61, 360 75, G11B 1504, G11B 1512
Patent
active
042636264
ABSTRACT:
This invention relates to a control system for a tape recorder wherein magnetic head means is selectively moved relative to a magnetic tape. A recording and reproducing circuit including a recording amplifier and a reproducing amplifier is connected to the magnetic head means. Control means driven by a control electric motor moves the magnetic head means from a stopping mode to an operating mode including at least recording mode and reproducing mode. Mode selecting switches are provided to operate the control electric motor. The control system of the invention comprises means provided in the recording and reproducing circuit to energize it when instruction signals are received. The control system also comprises comparator means at its output connected to the means energizing the recording and reproducing circuit and at its input connected to muting reference signal generating means and to variable signal generating means to generate a variable signal varying in accordance with movement of the magnetic head means relative to the magnetic tape. The comparator means is constructed to generate the instruction signals during the period after the magnetic head means contacts the magnetic tape and before the magnetic head means reaches the position where the recording and reproducing mode is to be effected.
REFERENCES:
patent: 3810237 (1974-05-01), Nozawa
patent: 3947884 (1976-03-01), Yokoto et al.
patent: 4071861 (1978-01-01), Hirose
patent: 4129889 (1978-12-01), Ban et al.
patent: 4159492 (1979-06-01), Ban et al.
Canney Vincent P.
Nakamichi Corporation
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