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TEACHING DEVICE

  • US 3,648,388 A
  • Filed: 11/20/1969
  • Issued: 03/14/1972
  • Est. Priority Date: 11/20/1969
  • Status: Expired due to Term
First Claim
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1. A teaching device for use with a projector having a remote control unit and adapted to project images from a series of film frames, comprising:

  • circuit means operably connected to the remote control unit;

    a predetermined plurality of select switches associated with each image projected;

    advance means operably connected to said circuit means and adapted to actuate the remote control unit and tHereby advance each frame;

    means adapted to connect said circuit means to a power source;

    said circuit means adapted to prevent operation of said advance means until the correct select switch of said predetermined plurality of select switches for each image has been selected and operated; and

    program means physically separate from said film frames and electrically interconnecting said circuit means with said predetermined plurality of select switches to program said circuit means and thereby determine an electrically changeable sequence of correct select switches for the images.

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