Pinch roller drive mechanism and control circuit in open reel type tape recorder

A circuit for operating a pinch roller drive mechanism having a play plunger actuating coil and a pause plunger actuating coil comprising:

• a first AND gate, a play signal being coupled to a first input of said first AND gate;
• a toggle flip-flop, a pause signal being coupled to a toggle input of said toggle flip-flop;
• a delay circuit and a first diode coupled in series with one another between one output of said toggle flip-flop and a second input of said first AND gate;
• a first transistor switch coupled to actuate said play plunger actuating coil, said first transistor switch operating in response to an output of said first AND gate;
• means for producing a current flow for a predetermined period of time following actuation of said first transistor switch;
• a second transistor switch coupled to actuate said pause plunger actuating coil in response to the flow of current produced by said current producing means;
• a third transistor switch operating in response to a second output of said toggle flip-flop, said third transistor switch being coupled to actuate said second transistor switch independently of said current generating means;
• a second AND gate, said second output of said toggle flip-flop being coupled to a first input of said second AND gate and at least one of a fast-forward, rewind, and stop signals being coupled to a second input of said second AND gate;
• a fourth transistor switch;
• means for actuating said fourth transistor switch for a predetermined period of time following the presence of the high level output signal on the output of said second AND gate, a high level signal at said second output of said toggle flip-flop and a high level output signal at said output of said first AND gate;
• and
• a switching circuit operating in response to an output of said fourth transistor switch for applying a first relatively high potential to said play plunger actuating coil and said pause plunger actuating coil when said fourth transistor switch is actuated and a relatively low potential to said play plunger actuating coil and said pause plunger actuating coil when said fourth transistor switch is inactive.