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Talking book with an infrared detector used to detect page turning

  • US 4,636,881 A
  • Filed: 09/10/1984
  • Issued: 01/13/1987
  • Est. Priority Date: 09/10/1984
  • Status: Expired due to Fees
First Claim
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1. Apparatus for providing recorded audible messages related to material being observed on sensible sheets comprising,means for detachably securing said sensible sheets,playback means for audibly reproducing sound messages recorded on a recording medium,means for supporting said playback means and said means for detachably securing said sensible sheets in fixed relationship,said means for detachably securing allowing easily turning said sheets as in a book to allow said sheets to exchange places between a left pile of sheets and a right pile of sheets and having means for guiding said sheets over a predetermined turning path when moving between said left and right piles,switching means in fixed relationship to said playback means and said means for detachably securing for providing at least a start signal when a sensible sheet moves from one of said piles to the other,said switching means comprising left and right switching means for being activated in sequence when a sheet moves over said predetermined turning path from one pile of the other.and logical circuit means coupled to said left and right switching means for providing said start signal only when said sheet moves in a predetermined forward direction from one of said piles to the other,said logical circuit means further including means responsive to a sheet moving in a predetermined backward direction from said other of said piles to said one of said piles for providing a stop signal,means responsive to said stop signal for disabling said playback means and interrupting the production of audible sounds,and means responsive to said start signal for activating said playback means to produce audible sound associated with a sheet.

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