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    Farthest advance circuit for a remote station dictating system
    51.
    发明授权
    Farthest advance circuit for a remote station dictating system 失效
    用于远程站点系统的前沿电路

    公开(公告)号：US3823274A

    公开(公告)日：1974-07-09

    申请号：US32237373

    申请日：1973-01-10

    申请人： DICTAPHONE CORP

    发明人： MATZ B

    IPC分类号： G11B15/02 ,  G11B15/56 ,  G11B25/06 ,  G11B31/00 ,  H04M11/10

    摘要： An electronic farthest advance switch in the central record/playback unit of an endless tape recording system is biased to become conductive through a mechanical switch which is closed when a loop of recorded tape has been backspaced past the magnetic record/playback head. The conductive farthest advance electronic switch provides a bias voltage to the electronic seizure, dictate and motor driver switches in the record/playback unit to activate the motor and to energize a solenoid connected to a capstan pressure roller mechanism to thereby engage and advance the loop of recorded tape past the record/playback head so that the loop of tape is ready for transcribing. Simultaneously, a reverse bias voltage is supplied to each remote dictating station connected to the central record/playback unit to prevent the remote dictating stations from seizing control of the record/playback unit during the farthest advance operation.