AUDIO-VISUAL PRESENTATION DEVICE

摘要

An audio-visual presentation device including a magnetic cassette tape drive and circuitry adapted in a normal automatic forward mode for reproducing audio signals from one track of the cassette tape and for controlling a remotely controllable slide projector in response to signals from a second track of the cassette tape such that the audio signals and slide projector visual presentation remain in synchronization. The device includes a manual reverse switch to permit the device operator to repeat portions of the audio-visual presentation, the switch when in a first position providing normal automatic forward operation in a first tape drive mode and when in a second position providing in a second tape drive mode reverse operation at a higher speed with the audio output muted and the signals from the second track of the tape controlling the projector to cycle in a reverse direction. Electrical circuitry connected to the manual reverse switch responds to movement of such switch from the second to the first position to provide control for transporting the tape to the visual advance signal immediately preceding the audio signal portion corresponding to the slide being shown by the projector when the switch is changed from the second to the first position whereby the device is returned to normal automatic forward mode prior to the beginning of the audio signal portion corresponding to such slide. The electrical circuitry also prohibits tape drive direction changes when visual advance signals are being detected from the second track of the tape and when the projector is cycling such that synchronization of the audio output and the slide projector display is maintained irrespective of movement of the switch between its first and second positions.