Dynamic magnetic information storage or retrieval – Miscellaneous
Patent
1980-03-28
1982-06-22
Canney, Vincent P.
Dynamic magnetic information storage or retrieval
Miscellaneous
360 61, G11B 1500
Patent
active
043365604
ABSTRACT:
A pulse-operated mode switching mechanism for tape recorders comprises a single solenoid operated in response to a pulse of different periods depending on the function of the operating key. A rotary wheel is driven by a motor to provide a 360.degree. revolution in response to the energization of the solenoid. Electromagnetic transducer heads are mounted on a carrier plate which is movable between a first position in which the heads are remote from the tape and a second position in which the tape is in contact with the heads. The carrier plate is moved from the first to second position by the rotation of the rotary wheel when the solenoid is energized for an interval greater than a first predetermined interval and returned to the first position in response to the energization of the solenoid. During playback or recording mode the solenoid is energized for an interval greater than the first predetermined interval so that the transducer heads are brought into contact with the tape. With the transducer heads in their tape contact positions, cueing control or the like is effected by energizing the solenoid for an interval smaller than the first predetermined interval but greater than a second predetermined interval. The pulse of this interval causes the carrier member to be locked in an intermediate position between its first and second positions during its return movement. The mechanism is restored to a stop position in response to a pulse with a duration smaller than the second predetermined interval.
REFERENCES:
patent: 4225894 (1980-09-01), Fulukawa
patent: 4232349 (1980-11-01), Kobayoshi
Canney Vincent P.
Faber Alan
Victor Company of Japan , Limited
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