Multi-function tape recorder having automatic timing and signalling system for training purpose

Claim 1

Recording and reproducing apparatus, comprising drive means for transporting a recording member having first and second recording tracks past a recording and reproducing location, first and second audio signal input devices, recording and reproducing head means at said recording and reproducing location for recording on said first and second recording tracks audio signals provided respectively by said first and second audio signal input devices and for reproducing an audio signal recorded on at least one of said first and second tracks, and a timing and signalling circuit connected to the first audio signal input device to produce, after termination of an audio signal provided by said first audio signal input device, a visible signal for a duration substantially equal to the interval between commencement of said audio signal and commencement of said visible signal, said timing and signalling circuit comprising a first storage device which is charged during recording of an audio signal on the first recording track, trigger means connected to the first storage device and generating an output signal of a first voltage while the first storage device is in a charged condition and an output signal of a second voltage while the first storage device is in a discharged condition, a second storage device connected to receive the output signal of the trigger means to be charged when the trigger means generates said first voltage and to discharge when the trigger means generates said second voltage, the discharge time constant of the second storage device being substantially equal to the charge time constant thereof, and output means connected to the trigger means and to the second storage device and effective to cause production of said visible signal when, but only when, the output signal of the trigger means is at said second voltage and the second storage device is discharging.