×

Automatic searching film reader

  • US 3,290,987 A
  • Filed: 01/16/1964
  • Issued: 12/13/1966
  • Est. Priority Date: 01/16/1964
  • Status: Expired due to Term
First Claim
Patent Images

1. AN AUTOMATIC SEARCHING FILM READER FOR USE WITH A FILM BEARING DOCUMENT IMAGES, DISTINCTIVE OPTICAL CODING BETWEEN ADJACENT SERIES OF IMAGES AND A POSITION MARK ASSOCIATED WITH EACH IMAGE, THE READER COMPRISING:

  • MEANS FOR DRIVING A FILM AT A RELATIVELY HIGH VELOCITY DURING A SEARCHING OPERATION;

    MEANS FOR ILLUMINATING THE CODING AND POSITION MARKS ON THE DRIVEN FILM;

    FIRST PHOTOCELL MEANS RECEPTIVE OF LIGHT FLUX FROM THE ILLUMINATED CODING FOR GENERATING SIGNALS IN RESPONSE THERETO;

    COMPARISON CIRCUITRY RECEPTIVE OF THE SIGNALS FROM SAID FIRST PHOTOCELL MEANS;

    MEANS FOR ENCODING SAID COMPARISON CIRCUITRY TO BE SELECTIVELY RESPONSIVE TO THE SIGNALS GENERATED IN RESPONSE TO A PRESELECTED CODING ON THE FILM AND TO DEVELOP A HIT SIGNAL WHEN SUCH PRESELETED CODING IS DETECTED;

    CONTROL MEANS RESPONSIVE TO A HIT SIGNAL FOR DE-ENERGIZING SAID DRIVING MEANS;

    OTHER PHOTOCELL MEANS RECEPTIVE OF LIGHT FLUX FROM THE ILLUMINATED POSITION MARKS FOR DETECTING THE POSITION MARKS AS THE FILM OVERRUNS THE POSITION OF THE HIT SIGNAL;

    MEANS FOR COUNTING THE POSITION MARKS DETECTED;

    AND MEANS FOR DRIVING THE FILM AT A RELATIVELY LOW VELOCITY IN A REVERSE DIRECTION UNTIL THE POSITION MARKS ARE RECOUNTED.

View all claims
  • 0 Assignments
Timeline View
Assignment View
    ×
    ×