Magnetic-recording and reproducing apparatus which is automatically placed in forward mode after response to a previous control signal

Claim 1

Apparatus for driving a magnetic recording medium having control signals recorded thereon in the intervals between information signals recorded thereon, comprising: means for reproducing said control signals from said recording medium; a drive motor for driving said recording medium selectively in forward and reverse directions; power supply means for supplying motive power to said drive motor; a relay operated switch interposed between said drive motor and said power supply means to control the supply of motive power to said drive motor; a plurality of relay contacts coupled between said power supply means and said drive motor for selectively changing the polarity of voltage supplied to said motor from said power supply means; first holding means for holding said relay operated switch in an open position to disconnect said drive motor from said power supply means in response to the detection of one of said control signals during the movement of said recording medium in a forward direction; first switch means for disengaging said first holding means to thereby close said relay operated switch; second switch means for disengaging said first holding means independently of said first switch means and substantially at the same time shifting said plurality of relay contacts between first and second states; second holding means for holding said plurality of relay contacts in said second state to thereby reverse the polarity of voltage supplied to said motor compared to the first state of said relay contacts; and means coupled to said reproducing means for closing said relayoperated switch in response to the reproduction of said control signals to thereby disengage said second holding means and shift said relay contacts back to said first state.