Signalling and controlling device for magnetic tape apparatus

Claim 1

In a magnetic tape apparatus having a tape take-up reel driven by a motor when connected with a source of power, a control circuit for controlling the motor and for providing an indication of that control, comprising: a first detector responsive to the speed of said take-up reel for developing a first signal corresponding thereto; a second detector responsive to said motor decreasing to zero speed for developing a second signal indicative thereof; indicator means having three different operational modes including a first, nonoscillating operational mode, a second, nonoscillating operational mode, and a third, oscillating operational mode; and control means responsive to said first and second signals for controlling said indicator means and responsive to said first signal for controlling the application of power to said motor, said control means including means for disconnecting said motor from said source of power when said take-up reel speed decreases below a normal speed, and means for causing said indicator means to be in said first operational mode when the take-up reel is at or above said normal speed, to be in said second operational mode when the take-up reel speed is below said normal speed and said motor speed is above zero speed and to be in said third oscillating operational mode when the motor speed is zero.