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Audio visual device

  • US 3,874,787 A
  • Filed: 04/24/1973
  • Issued: 04/01/1975
  • Est. Priority Date: 04/24/1973
  • Status: Expired due to Term
First Claim
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1. An audio visual device for viewing pictures, symbols, reading material and like material synchronized with sound comprising:

  • a housing having audio and viewing passageways therein;

    a lens system in the housing aligned with the material to be viewed;

    support means and a gravity feed advance mechanism in said housing positioned to engage with visual material introduced to said housing and to advance said visual material automatically in a predetermined manner;

    audio means in said housing adapted to receive and transmit an audio program;

    a power source associated with said housing;

    audio control means in said housing responsive to said power source to operate said audio receiving means;

    visual control means responsive to predetermined audio signals from the audio means to automatically activate said advance mechanism to advance the visual material under the force of gravity in synchronization with the audio program;

    a drive motor being in the housing connected to the power source;

    a tape containing an audio program and a number of spaced audio signals thereon;

    drive means connected to the drive motor to receive an audio programmed tape and drive said tape;

    an audio pick-up head in said housing and adapted to be brought into engagement with the tape so that the audio program and the audio signals can be picked up by said head;

    a first two-stage amplifier system connected to said pick-up head to amplify the audio program and the audio signals;

    filter means in said first two-stage amplifier to separate the audio signals from the audio program;

    a speaker connected to the first two-stage audio amplifier to receive the audio program therefrom and transmit the program to the listener;

    a rectifier connected to the first two-stage amplifier to receive the filtered audio signals and to rectify the signals;

    a second two-stage amplifier connected to the rectifier to amplify the rectifier audio signals;

    a relay connected to the second two-stage amplifier and to a solenoid with the solenoid being connected to the advance mechanism for the visual material so that when an amplified audio signal is received by the relay, the solenoid will be actuated to advance the visual material in a predetermined manner;

    a time delaying amplifier connected to said relay and responsive to an audio signal of predetermined length to receive that signal and activate a second relay which opens a switch between the power source and the motor, stopping operation of the device; and

    the switch adapted to be manually closed to restart the device upon demand.

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