Dynamic magnetic information storage or retrieval – Monitoring or testing the progress of recording
Patent
1983-12-20
1986-08-19
Cardillo, Raymond F.
Dynamic magnetic information storage or retrieval
Monitoring or testing the progress of recording
360 721, 360 723, 360 741, H04N 5782, G11B 15467
Patent
active
046072942
ABSTRACT:
A magnetic video recording apparatus for intermittent recording comprises a capstan motor (2), a rotation detecting circuit (3), a control circuit (4) and a recording start instructing circuit (5). The control circuit (4) serves to apply driving voltage (V.sub.1 and V.sub.2) to the capstan motor (2) for a time interval corresponding to one frame, whereby a magnetic tape (1) is made to travel approximately for one frame. The travelling distance of the magnetic tape (1) is examined in the control circuit (4) by counting the number of pulse signals (PS) provided from the rotation detecting circuit (3). If the magnetic tape (1) is not made to travel exactly for one frame, the control circuit (4) applies driving voltage (V.sub.3 and V.sub.4) in the form of pulses to the capstan motor (2) till it travels exactly for one frame. Thus, the magnetic tape (1) is made to travel exactly for one frame.
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Nishitani Yoshihisa
Osafune Yukio
Cardillo Raymond F.
Mitsubishi Denki & Kabushiki Kaisha
Young Wayne R.
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